If you’re planning a secondary dwelling (a granny flat) where an old pool currently sits, the pool itself is rarely the hard part of the approval. The two things that actually decide whether your plan works are setbacks, how far the new structure must sit from your boundaries, and site coverage, the maximum proportion of your lot that can be built on. A pool positioned close to a rear or side boundary, which is common on older Hunter region blocks, can leave less usable space for a compliant secondary dwelling than the pool’s footprint alone suggests.
This guide focuses specifically on the setback and site coverage math that applies once the pool comes out, complementing our broader guide on granny flats and pool removal, which covers the geotechnical and footing side of building on a former pool site.
Why the Pool’s Old Footprint Isn’t the Whole Story
It’s tempting to assume that once a pool is removed, its footprint becomes buildable space. In practice, the pool’s position relative to your boundaries, not just its size, determines what can go there. A pool built hard against a rear boundary, common where older Hunter region blocks were laid out with generous street setbacks and tight rear yards, may sit entirely within a zone where a secondary dwelling can’t legally be placed, regardless of how much the pool removal opens up.
Before committing to pool removal as the enabling step for a granny flat, it’s worth having a planner, draftsperson or your certifier check the actual buildable envelope on your lot, factoring in setbacks, site coverage and any existing structures, rather than assuming the old pool location is automatically the right spot.
Setback Requirements for Secondary Dwellings in NSW
Secondary dwellings built under the complying development pathway are primarily governed by the State Environmental Planning Policy (Housing) 2021 and your local council’s Development Control Plan. Typical setback requirements across Newcastle, Lake Macquarie and Maitland local government areas include:
| Boundary | Typical minimum setback | Notes |
|---|---|---|
| Rear boundary | 3m | Some councils allow reduced setbacks for single-storey secondary dwellings under specific DCP provisions |
| Side boundary | 0.9m-1.5m | Varies by council and whether the dwelling is single or double storey |
| Setback from primary dwelling | Often none specified, but separation for privacy and fire safety commonly applies | Check your council’s DCP |
These figures are typical, not universal. Each council sets its own DCP provisions, and figures can change, so confirm current setback requirements with your local council or a private certifier before finalising any design based on the former pool location. Where a pool sits closer to a boundary than the applicable setback allows, the secondary dwelling has to be positioned elsewhere on the lot, even after the pool is gone, which can mean the pool removal and the granny flat end up in genuinely different parts of the yard.
Site Coverage: The Other Constraint That Catches People Out
Site coverage limits the total proportion of your lot that can be covered by buildings, typically expressed as a percentage, commonly somewhere between 50-60% depending on the zone and council, though this varies and should always be confirmed locally. This calculation includes the existing house, garage, carport, sheds, and the proposed secondary dwelling, combined.
Where this catches owners out: removing a pool doesn’t change your site coverage number, a pool isn’t a “building” for site coverage purposes in most NSW planning schemes, so its removal doesn’t free up coverage capacity the way demolishing a shed would. What actually matters is whether your total existing building footprint, plus the proposed secondary dwelling’s floor area, fits within your site coverage cap. If your existing house and other structures already use most of your available coverage, a secondary dwelling may need to be smaller than the maximum 60sqm allowed under the Housing SEPP, regardless of how much clear ground the pool removal has created.
Private open space is a related, separate requirement: most councils require a minimum area of usable private open space (often per dwelling, per resident, or as a flat minimum), and a large area of cleared, compacted ex-pool ground can help satisfy this even where it can’t be built on due to setback constraints.
Practical Sequence: Checking Feasibility Before Committing to Removal
- Get your lot’s setback and site coverage figures from council or a planning consultant, based on your specific zone and DCP, before assuming the pool site works for a secondary dwelling.
- Overlay the secondary dwelling’s minimum footprint (a one-bedroom unit is commonly 40-55sqm) against the buildable envelope, factoring in setbacks from all boundaries and from the existing house.
- Confirm the pool’s removal method matches your build plan. A full pool removal with engineered, certified backfill is required if the secondary dwelling’s footings will be anywhere near the former pool location; a partial fill-in is not suitable ground to build on. See our granny flat and pool removal guide for the geotechnical and footing detail.
- Check the approval pathway. Complying development (CDC) is faster where your lot meets all standard criteria; a development application is required where it doesn’t, commonly triggered by heritage overlays, flood-prone land, or a lot that falls short of minimum size or setback compliance.
- Sequence the works. Pool removal and backfill, then compaction certification and geotechnical investigation, then footing design, then the secondary dwelling application, in that order. Trying to fast-track by designing before the ground is properly characterised risks a redesign later.
This same setback and site coverage logic applies at a larger scale if the end goal is a duplex, dual occupancy or subdivision rather than a granny flat; see our guides on pool removal before subdivision and pool removal before a knock-down rebuild for how the sequencing and ground-condition requirements scale up.
What This Means for Your Pool Removal Quote
If setbacks and site coverage rule out building directly on the old pool footprint, but you still want the ground usable as open space, garden or a smaller structure like a shed within the applicable exempt-development limits, that’s a genuinely different (and usually simpler) removal brief than “engineer this ground for a habitable building.” Tell us your actual plan when requesting a quote, including whether a secondary dwelling might sit on or near the former pool location, so the removal and backfill method, and the compaction standard, are specified correctly from the outset rather than assumed.
Pool Removal for Secondary Dwelling FAQs
Does removing a pool automatically free up site coverage for a granny flat?
No. A pool generally isn’t counted as a building for site coverage purposes, so removing it doesn’t change your available coverage percentage. What matters is your total existing building footprint plus the proposed secondary dwelling’s floor area against your council’s site coverage cap.
Our pool is close to the rear boundary. Can we still build a secondary dwelling there?
Only if the location satisfies your council’s setback requirements, typically around 3m from a rear boundary, though this varies by council and dwelling type. If the pool sits within that setback zone, the secondary dwelling needs to be positioned elsewhere on the lot, even after the pool is removed.
Can a partial pool fill-in support a secondary dwelling’s footings?
Not appropriately. A partial fill-in leaves the pool shell in the ground, an irregular buried structure that makes reliable footing design very difficult. Full pool removal with engineered, certified backfill is the standard requirement wherever a secondary dwelling’s footings might be nearby.
Do we need a development application or can we use complying development?
It depends on whether your lot and proposal meet all CDC criteria under the Housing SEPP, lot size, setbacks, site coverage and any overlays like heritage or flood mapping. Where your site doesn’t meet every CDC criterion, a full development application is required instead. Confirm with council or a private certifier.
How much usable space does a typical secondary dwelling need, including setbacks?
A one-bedroom secondary dwelling is commonly 40-55sqm of floor area, but the actual land footprint needed is larger once setbacks from all boundaries and the existing dwelling are factored in. A planner or draftsperson can confirm whether your specific lot, and the former pool location within it, provides enough compliant buildable area.
Talk to Us About Your Site
If a secondary dwelling is part of your plan, tell us at quoting stage so the pool removal and backfill are specified for that outcome from day one. Get a free quote through the form, and we’ll refer your enquiry to an independent local contractor to inspect your site. Licence details are provided before you accept a quotation.