Specialists In Swimming Pools & Landscape Designs On Slopes & Large Acreage Blocks
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Outdoor Features That Require Approval and How They Affect Design
Understanding how landscape decisions affect approvals, cost and buildability from the outset.
Outdoor features such as pools, retaining walls, structures and access areas are not assessed in isolation. In most residential projects, these elements are typically classified as Class 10a or 10b structures, forming part of the broader site works rather than the main building.
Each element interacts with site conditions, planning controls and construction requirements, and once certain thresholds are reached, these decisions can significantly affect how a project is designed, approved and built.
Across the Newcastle, Hunter Region and Central Coast, these factors are rarely straightforward. Changes in level, size, location and site constraints often introduce additional requirements — influencing feasibility, cost, coordination and how the landscape ultimately functions.
This page outlines common points where those shifts occur, helping you understand when design decisions begin to carry broader implications — and why it is important to resolve them early.
Landscape Features That Change the Design
Landscape features may appear straightforward at concept stage, but they are not all treated equally once thresholds are reached. Structural elements such as decks, pergolas and retaining walls are assessed against defined limits, while hard surfaces are typically assessed based on their impact on drainage, site coverage and neighbouring properties.
From experience, these are the points where projects start to shift — not because the design is wrong, but because additional requirements, constraints and coordination begin to apply. The table below highlights common triggers where those changes typically occur.
Landscape Feature | When It Starts to Change the Design |
|---|---|
Fencing & Boundary Elements | Front fencing above ~1.2 m generally requires approval, while side/rear fencing up to ~1.8 m may be exempt, subject to location, visibility and site constraints. Pool fencing must comply with strict safety barrier requirements, and modifications or integrated designs (e.g. glass fencing, retaining integration) may also trigger approval and certification. |
Swimming Pools & Swim Spas | Pools generally require approval, registration and compliance certification in NSW. Design complexity is usually driven by safety barriers, drainage, setbacks and surrounding works, including paving, retaining and level changes. Larger pools over 40,000 litres may also trigger BASIX. |
Retaining Walls & Landform | Walls up to around 600mm are generally exempt, subject to conditions. Above this, approval may be required — especially where close to boundaries, affecting drainage or on sloping sites. |
Outdoor Structures (Balconies, Decks, Patios, Pergolas, Verandahs, Cabanas, Gazebos) | Structures exceeding 25 m², 1 m above ground, or 3 m in height generally move beyond exempt development and may require approval depending on zoning, attachment and site constraints. |
Outdoor Kitchens & Fireplaces | When permanently installed (plumbed, wired or fixed), these elements are treated as structures rather than landscaping. This contributes to site coverage and servicing constraints, affecting layout and compliance. |
Driveways & Vehicle Hardstand | Changes to access, width or parking areas can trigger drainage, crossover and street interface requirements. These are assessed based on function rather than a single fixed size threshold. |
Recreational Courts & Hard Paved Areas | Large paved areas — including sports courts, courtyards and extensive hardstand — are typically assessed based on drainage, runoff, site coverage and visual impact, rather than a fixed size threshold. As these areas increase, they can significantly influence stormwater management, layout and how the site is assessed. |
Structural landscape elements such as decks, pergolas and retaining walls are assessed using fixed thresholds — typically based on size, height and location — while hard paving is generally assessed on performance, particularly how it affects drainage, runoff, site coverage and adjoining properties.
Landform + structure
Retaining walls and landform changes are often the point where landscape work becomes structural construction. While smaller walls (around 600 mm or less) may be exempt in some cases, larger walls or those close to boundaries often trigger structural design, setbacks and drainage requirements. On sloping sites, geotechnical conditions, engineering design and — in some areas — mine subsidence constraints can significantly influence feasibility, wall type and cost. What appears to be a simple level change can quickly reshape the entire layout of the site.
Built features
Unlike other outdoor features, pools are regulated structures that require approval and ongoing compliance as a baseline in NSW.
Pool owners must register the pool, comply with safety barrier and fencing laws, and display CPR signage. When constructing a new pool or substantially modifying an existing one, a principal certifier must be appointed, temporary fencing is required during construction, and the permanent barrier must comply before an occupation certificate is issued.
From a design perspective, whether new or existing, the pool itself is rarely the issue. Approval is primarily driven by how the pool integrates with the site — whether as a new installation or as part of a renovation — particularly safety barriers (including pool fencing), drainage, setbacks and surrounding works such as paving, retaining and level changes.
These elements form the broader pool area and are assessed as a coordinated system rather than in isolation. Changes to levels, fencing alignment, hard surfaces or retaining near the pool can introduce additional requirements, affecting how the design is resolved and approved. This extends to surrounding conditions, where elements such as planting near pool fencing can also influence how compliance is maintained over time.
Similar considerations apply to pool renovations, where changes to fencing, levels, drainage, finishes or surrounding structures can trigger new compliance requirements, even when the existing pool remains in place.
Larger pools (typically over 40,000 litres) or heated pools may also trigger additional requirements such as BASIX, which can introduce measures like pool covers or energy efficiency controls depending on water use and heating demand.
Decks and outdoor structures move from landscaping into built form once key thresholds are exceeded. For example, structures over 25 m², elevated above 1 m, or above 3 m in height generally fall outside exempt development limits. Permanently installed elements such as outdoor kitchens and fireplaces introduce additional servicing, ventilation and safety requirements. In bushfire-prone areas, construction materials and planting must also respond to BAL requirements, which can further constrain how these features are designed and located.
For a design-led approach to new pools, see our Custom Pool Design page. For upgrades to existing pools and surrounding areas, see our Pool Renovation Design page.
Site function
Driveways, access and hard paved areas are typically not defined by a single size limit, but by how they perform within the site. As these areas expand, they begin to influence drainage, runoff and site coverage, often triggering stormwater design requirements.
On flood‑affected sites, even relatively small changes in levels or paving can alter how water moves across the site, requiring additional coordination with civil and hydraulic inputs. These elements often determine how the site functions overall and can constrain the placement of other features.
Boundaries, neighbours & planning context
Boundary elements and larger external features shape how the site relates to its surroundings. For example, front fencing above around 1.2 m is generally subject to approval, while taller fencing or structures near boundaries can introduce additional scrutiny around setbacks, privacy and visual impact.
Larger hard‑surfaced elements such as courts can amplify these effects. In some locations, broader planning constraints — including heritage controls, streetscape requirements or estate design guidelines — may further influence what is appropriate or achievable at the site boundary.
Supporting Reports That Can Change the Design
Once certain landscape features cross structural, planning or site thresholds, the issue is not just approval. Additional surveys, consultant input and specialist reports may be required, which can change the design, increase scope and affect overall cost. Understanding these early helps clients make better decisions before documentation begins.
From experience, these are often the points where projects change direction — not at the approval stage itself, but when underlying site constraints, easements or specialist input begin to affect what is realistically achievable.
Engineering input is often the point where design intent is translated into build reality. It brings together survey data, geotechnical advice and site constraints, and formalises how the work must be constructed. From experience, this is also where costs can shift significantly — not because of the approval pathway itself, but due to the construction methods, detailing and structural requirements introduced at this stage. This also applies where existing structural issues or failures are involved.
In many cases, it is not the approval pathway that drives cost, but the engineering, services constraints and site-specific requirements that follow once these reports are triggered.
Supporting Report | Why It Can Change the Design |
|---|---|
Site Survey (AHD) & EGL | Confirms existing levels, boundaries and site fall. This can materially affect pool placement, retaining wall heights, drainage strategy, vehicle access and the extent of cut and fill. |
Geotechnical & Structural Engineering | May be required where retaining walls, structural elements, unstable ground or significant excavation are involved. Ground conditions and engineering advice can change footing design, wall type, buildability and overall feasibility. |
Water Authority Approval / Build-Over Requirements | Existing water, sewer or stormwater infrastructure and easements can restrict the location of pools, retaining walls and structural landscape elements. Where build-over is required, additional engineering and construction controls may apply, which can significantly increase complexity and cost. |
Mine Subsidence / Subsidence Advisory | In identified subsidence areas, ground movement risk may require specialist assessment and structural design controls. This can affect excavation methods, retaining wall design, and the feasibility of certain landscape features, particularly on sloping sites. |
Engineering Design & Structural Specification | Defines how the final works must be constructed, often introducing specific detailing and construction requirements that can significantly increase complexity and cost. Also applies where existing structural issues or failures need to be resolved. |
Arborist & Tree Protection Plans (AS 4970) | Existing trees and Tree Protection Zones can restrict excavation, pool location, retaining wall alignment, driveway layout and hardscape extent. In some cases, they force redesign rather than minor adjustment. |
Bushfire Attack Level (BAL) Plans (AS 3959) | On bush fire prone land, additional bushfire requirements can affect setbacks, defendable space, planting selection, material choice and how certain site features are positioned relative to structures and vegetation. |
Flood Assessment / Flood Impact Information | On flood-prone land, flood controls can affect how site works are laid out and interpreted. Pools, retaining conditions, driveways, open space and ground-level decisions may need to respond differently where flooding is a live constraint. |
BASIX-Compliant Plans | Large residential pools and spas can trigger BASIX requirements. In NSW, a BASIX certificate is required for pools or spas of more than 40,000 litres, which can affect pool sizing, water and energy design considerations, and overall project cost. |
When Landscape Features Are Not Resolved Properly
When landscape features are not properly resolved early, the consequences usually extend well beyond the approval itself. In practice, poorly planned retaining walls, drainage, planting, pools, access or boundary treatments can delay approvals, trigger redesign, complicate construction and create friction with neighbours, certifiers and council.
From experience, the real cost is often not the application outcome itself, but the loss of time, the redesign of works that were assumed to be settled, and the way unresolved landscape issues can affect how the property functions day to day. Outdoor areas may become less usable, privacy may be compromised, and relationships with adjoining neighbours can become strained where drainage, levels or boundary treatments are not handled carefully.
These issues are far easier — and far less expensive — to resolve in design than after approval or during construction.
Common Reasons Projects Stall, Change or Cost More
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Canopy or planting outcomes are not resolved properly
If the proposed planting does not convincingly demonstrate how canopy, screening or deep soil expectations will be met over time, the landscape can be treated as under-designed rather than complete. That often leads to redesign, added planting cost, or a weaker long-term outcome for privacy, shade and visual value.
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Structural landscape elements are shown without enough clarity
Retaining walls, cut and fill, stairs, drainage and level transitions frequently look manageable at concept stage but become far more complex once engineering and site data are applied. Where these details are unresolved, projects can stall, construction costs can rise, and the finished outdoor space may feel more dominated by compliance than good design.
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Outdoor space is technically provided, but not genuinely usable
On multi-dwelling and more constrained residential sites, private open space can fail not only on dimensions but on amenity. A courtyard or yard that is overshadowed, steep, disconnected or over-constrained may satisfy very little in practical use, even before formal assessment issues arise. That affects both lifestyle and long-term market appeal.
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Bushfire, flood or site constraints conflict with the intended landscape outcome
Features that seem simple on paper — planting beds, mulch, fencing, pools, retaining or screening — can become far more restricted on bushfire-prone or flood-affected sites. When those constraints are not addressed early, the project often starts to move backwards, with redesign replacing what was initially assumed to be fixed.
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Boundary and neighbour impacts are underestimated
Screening, runoff, retaining height, planting location and level changes all affect how the site sits with adjoining land. Where those relationships are not handled carefully, landscape issues can become neighbour issues very quickly — and those are rarely inexpensive to unwind once construction is underway.
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Approval conditions are treated as paperwork rather than build requirements
Some of the most avoidable problems occur when approval-stage landscape requirements are not carried through into what is actually built. Where the finished outcome no longer aligns with the approved intent, final certification can become more difficult and project closure can be delayed. In NSW, an Occupation Certificate is tied to whether the completed work is suitable to occupy and consistent with the approved plans and conditions.
The best landscape outcomes are rarely the result of pushing a feature through approval at any cost. They come from resolving compliance, buildability and site relationships early, so the finished space performs properly, adds value, and supports the way the property is actually used.
When Problems Are Left Until After Construction
This is something we see regularly in practice. Features such as pools, retaining walls, pergolas and built outdoor areas are often treated as straightforward additions, and in some cases constructed before approvals or constraints are fully resolved.
In reality, this approach often leads to significantly higher costs, not lower. Once engineering, services constraints or compliance requirements are triggered after construction, the work may need to be modified, partially removed or completely rebuilt. What was intended to improve the property can instead reduce usability, create ongoing compliance issues and complicate the path to final certification.
In these situations, the issue is no longer just design or approval — it becomes a matter of rectification, certification and, in some cases, retrospective approvals or compliance pathways such as Building Information Certificates.
The Building Information Certificate (BIC)
A Building Information Certificate (BIC) is typically required where a structure has been built without the appropriate approvals in place. This often arises with landscape elements such as retaining walls, decks, pools or other built features that were assumed to be straightforward at the time of construction.
In practice, needing a BIC is rarely planned. It is usually a response to a situation where something has already been built and does not align with approval requirements, documented conditions or accepted construction standards.
From experience, this is often one of the most difficult positions for a client to be in. What began as an intended improvement can turn into a prolonged process of review, engineering assessment and negotiation, with no straightforward path back to a compliant outcome. In many cases, the cost and complexity involved are significantly higher than if the issue had been addressed during the original design stage.
Why BIC situations are difficult in practice
particularly where the design has not fully considered approvals, site constraints or construction implications
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Impact on resale and conveyancing
Unapproved structures often need to be disclosed during sale. This introduces uncertainty for buyers, which can lead to renegotiation, delays or reduced sale price, particularly where further work may be required.
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Reduced market confidence
Where compliance is unclear, buyers and financiers may be more cautious. Even if a structure is ultimately accepted, the presence of retrospective approvals can affect how the property is assessed.
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Ongoing cost and uncertainty
In some cases, certification or compliance issues do not resolve permanently. Additional reporting, reassessment or documentation may be required over time, particularly where conditions or structural performance are involved.
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Rectification rather than design
Once construction is complete, the focus shifts from designing the best outcome to finding a way to make an existing outcome acceptable. This often limits what can be done and can result in compromises to usability, layout or visual quality.
A more reliable approach
The most effective landscape outcomes come from resolving constraints, approvals and construction requirements early — before features are fixed in place. This allows the design to respond properly to the site, reduces the risk of rework, and avoids situations where completed work must be revisited or amended under pressure.
Resolving Landscape Design with Approvals in Mind
Site‑Responsive Design from the Start
We don’t begin with features — we begin with how the site works. Levels, drainage, access, constraints and surrounding context are considered early, so decisions about pools, retaining, structures and boundaries are made with a clear understanding of what is achievable.
Coordinated for Buildability and Cost
Many issues only become visible once engineering, servicing and construction requirements are introduced. By aligning design with these factors early — including inputs such as geotechnical conditions, drainage, services and structural design — we help avoid unnecessary escalation in complexity and cost.
Design Aligned with Approval Pathways
Rather than treating approvals as a separate step, we consider them as part of the design process. Thresholds, site constraints and relevant requirements are addressed early, reducing the risk of redesign, delays or unexpected complications later.
Resolved as Part of a Complete Landscape
Landscape elements are not treated in isolation. Retaining, structures, access and planting are resolved together, ensuring the site functions coherently and the final outcome feels intentional, buildable and consistent with the approved design.
Start with a Clear Understanding of What’s Possible
If you’re considering landscape features such as pools, retaining walls, outdoor structures or boundary works, the most effective next step is understanding how your site responds to them.
This forms part of our broader Landscape Design service, where site conditions, constraints and design intent are resolved together before key decisions are locked in.
DA & CDC Landscape Plans FAQ
These questions address the point where outdoor features stop being simple design additions and begin to affect approval pathways, site constraints, costs and construction decisions.
Do Outdoor Features Need DA or CDC Approval?
Many outdoor features begin to require approval once they affect how the site is assessed as a whole. This commonly includes Swimming pools, Retaining walls over 600mm, Driveways and hardstand areas, and Decks or patios contributing to floor space ratio.
Approval is rarely triggered by a single element. It is usually driven by the combined impact on drainage, runoff, site coverage, private open space, setbacks, tree protection or streetscape presentation.
Where these factors become relevant, features typically move into DA, CDC or, in limited cases, Exempt development.
Which Outdoor Features Typically Require Approval?
Approval is generally required once features influence built form, levels, drainage, setbacks or overall site function.
This commonly includes:
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Swimming pools
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Retaining walls over 600mm
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Driveways and hardstand areas
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Decks or patios contributing to floor space ratio
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Front Fencing above common exempt limits
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Larger Pergolas, Verandahs, Cabanas, Gazebos or outdoor structures
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Features on sites with Flood, Bushfire, Heritage or estate controls
Even where features seem minor, councils often assess their cumulative impact, particularly on runoff, permeability, trees and boundary relationships.
DA vs CDC vs Exempt Development — What’s the Difference?
The pathway depends on the level of impact on the site.
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Exempt development applies to minor works meeting strict criteria
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CDC applies where designs meet defined standards
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DA applies to more complex or site-specific scenarios
As feature scale and complexity increase, projects typically move from Exempt → CDC → DA.
When Do Outdoor Features Stop Being Exempt Development?
Features stop being exempt once they exceed limits relating to size, height, location or site conditions.
This commonly occurs where features:
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exceed common size or height limits
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sit too close to boundaries
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alter drainage or runoff
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affect Flood- or Bushfire-prone land
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involve Heritage or conservation controls
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are attached to the dwelling or contribute to built form
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interfere with services, easements or Water authority assets
At that point, the feature usually moves into CDC or DA territory.
What Do I Need for a Pool Approval in NSW?
Pools require approval, registration and compliance certification in NSW, regardless of whether they are inground, above‑ground or swim spa-based.
The primary requirement is pool safety compliance, including fencing, gates and barrier regulations. Approval also considers how the pool affects drainage, setbacks and surrounding site conditions.
From experience, the pool itself is rarely the issue — it is the surrounding works such as paving, drainage, fencing and level changes that most often drive approval complexity.
Larger pools (typically over 40,000 L) may also trigger additional requirements such as BASIX.
What Needs to Be Resolved for Council Approval?
Approval focuses on whether the design can be clearly assessed and built as intended.
Councils and certifiers usually need to understand:
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where features sit in relation to boundaries, access and existing site levels
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how runoff and drainage will be managed
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whether trees, services, easements or site constraints are affected
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how hard and soft landscape areas are balanced
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whether structures, paving and retaining work together coherently
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how the design responds to conditions such as Flood, Bushfire, Heritage or estate controls
Approval issues often arise not because one feature is too large, but because the overall site response has not been resolved clearly enough.
What Information Is Typically Needed Once Features Trigger Approval?
Accurate approval documentation relies on coordinated site information.
This commonly includes:
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Registered land survey showing boundaries and levels
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Architectural plans where features relate to the dwelling or built form
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estate or developer guidelines where applicable
Depending on the site, further inputs may also be needed, such as:
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Geotechnical report or soil classification
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Flood report if the site is located within a flood planning area
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Bushfire assessment (BAL report) for bushfire prone land
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Heritage report or heritage impact statement where the property is heritage‑listed or within a conservation area
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water authority information where Stormwater, Sewer, Water main or Build over constraints apply
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structural engineering input for larger [Retaining walls], pools or attached structures
These inputs often change the design itself — not just the paperwork.
Why Do Well‑Resolved Landscape Details Matter for Approval?
Clear, coordinated design reduces RFIs, redesign and delays during assessment.
Resolving drainage, levels, structures and planting early ensures features work together before construction begins.
Most issues occur not because a feature is too large, but because its relationship to the rest of the site hasn’t been resolved — leading to costly changes later.
How Long Does Approval Documentation Usually Take Once Features Trigger It?
Timeframes depend on complexity and site constraints.
For straightforward projects:
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draft typically issued within 5–10 business days
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final documentation often completed within 2–3 weeks
Projects involving retaining walls, pools, steep sites or flood, bushfire or heritage constraints usually require additional coordination.
How Much Can Approval Requirements Add to Cost?
Cost is driven by what the feature triggers, not just the feature itself.
Common cost drivers include:
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Retaining walls and level changes
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larger Swimming pools
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Driveways and hardstand areas requiring drainage upgrades
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Bushfire, Flood or Heritage constraints
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water authority or easement issues such as Build over approvals
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engineering design and structural specification
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estate or DRC controls
In many cases, the cost comes from coordination, drainage and buildability, not the approval pathway alone.
Can I Change the Design After DA or CDC Approval?
Changes are possible where they do not affect the basis of approval.
Adjustments that impact levels, drainage, structure size, setbacks or site coverage may trigger non-compliance.
Under CDC, variations can invalidate approval.
Under DA, changes often require formal modification.
This reflects how tightly approval is tied to the resolved design.
Can My Builder or Architect Prepare Approval Drawings for These Features?
Basic drawings may be possible, but approval-ready documentation often requires specialist coordination once features affect drainage, levels, planting or site constraints.
This is particularly important for:
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Swimming pools
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Retaining walls
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sloping or constrained sites
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Driveways and hardstand areas
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environmental overlays such as Bushfire, Flood or Heritage
The issue is not just drawing the feature — it is resolving how the feature works within the site as a whole.
What’s the Difference Between Early Design Advice and Approval Documentation?
Early design explores what is possible.
Approval documentation demonstrates how the design can be assessed and built in line with planning controls.
In simple terms:
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early design asks “Can this work?”
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approval asks “Can this be approved and built?”
Aligning these early helps avoid redesign and delays.
Do I Need a Section 10.7 Certificate Before Starting?
Yes — a Section 10.7 Planning Certificate identifies constraints that directly influence design and approvals, including:
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Bushfire
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Flood
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Heritage
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zoning and overlays
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other conditions that may restrict CDC or Exempt development pathways
Without this, features can easily be designed outside the appropriate approval pathway.