The question people ask is “do I need council approval”. The better question is “which of three pathways am I on”, because in New South Wales the answer is almost never a straight yes or no. There is a category of work you can do with no approval at all, a category you can do through a private certifier in a fortnight, and a category that goes to Wollongong City Council and takes months. The difference between the second and third pathway is often worth $15,000 in consultant fees and half a year of holding costs.
What makes Wollongong distinctive is not the pathways themselves — they are the same statewide framework that applies in Sydney or Newcastle — but how often the fast pathway is closed off here. The escarpment, the region’s flooding and overland flow, its bushfire-prone land and its nine heritage conservation areas between them remove the complying development option from a very large share of the local housing stock. Plenty of people design a project on the assumption of a ten-day certificate and find out at lodgement that they are looking at a development application with three specialist referrals attached.
The way to avoid that is to establish which pathway you are on before you spend money on design. In Wollongong that takes one cheap document and about twenty minutes.
For more detail on this part of the project, see Heritage and Character Controls in Wollongong: Renovating Without Getting Stuck.
Start with a section 10.7 planning certificate
A section 10.7 planning certificate from Wollongong City Council is the cheapest risk check available anywhere in the renovation process, and it should be the first thing you buy — before an architect, before a builder, and ideally before you buy the house.
It tells you, for that specific parcel of land:
- The zoning and what development is permissible with and without consent.
- Whether the property is a heritage item or sits within a heritage conservation area.
- Whether the land is flood-affected, and how.
- Whether it is bushfire prone land.
- Whether it is affected by acid sulfate soils — relevant around Lake Illawarra.
- Whether Council holds any record of contamination.
- Whether the land is subject to slope instability, recorded in Council’s property database.
- Which development control plan chapters apply.
Every one of those items can close off the complying development pathway or add a consultant to your project. Buying the certificate first costs a nominal fee and saves people thousands with dull regularity.
Alongside it, check the NSW Planning Portal Spatial Viewer, which maps the same constraints, and — if you want certainty on ground conditions — contact Subsidence Advisory NSW on 02 4908 4300.
The three pathways
Pathway one: exempt development
Work that needs no approval at all, provided it meets every one of the standards in the state exempt and complying development policy. If it fails even one standard, it is not exempt — the criteria are not a guide, they are a gate.
Typically exempt in Wollongong:
- Internal alterations that are not structural and do not change the building’s use or fire safety provisions — new kitchen joinery in the same footprint, new floor coverings, painting.
- A like-for-like bathroom refit where no walls move and no structural work occurs.
- Replacing a roof with the same material and profile, on a non-heritage building.
- Small decks and balconies within height and area limits, meeting setback requirements.
- Garden sheds, carports, pergolas and fences within the specified dimensions.
- Replacement windows and doors in existing openings, on a non-heritage building.
- Air conditioning units, solar panels, water tanks and rainwater re-use systems within the standards.
Worked example. A 1990s brick-veneer house in Unanderra, on flat ground, no heritage listing, no bushfire mapping. The owners are replacing the kitchen in the same footprint, retiling two bathrooms without moving fixtures, replacing the floors and repainting. That is exempt development from end to end. No certificate, no application, no fee. They still need a licensed builder, HBCF cover and compliant waterproofing — exempt from planning approval does not mean exempt from the Building Code or from consumer protection law.
Pathway two: complying development (CDC)
A complying development certificate is issued by a private certifier or by Council against a fixed set of state-wide standards. It is fast — realistically 10 to 20 working days — and it is certain, because if you meet the standards it must be issued. That certainty is why people design to it.
Typically available for:
- Single-storey rear extensions within floor area, height and setback limits on a compliant lot.
- Internal alterations involving structural change — removing a load-bearing wall, for instance.
- Attached and detached secondary dwellings (granny flats) on lots of at least 450m², capped at 60m² of floor area.
- Larger decks and carports exceeding the exempt thresholds.
- New dwellings on standard lots meeting all the relevant development standards.
Worked example. A brick house in Figtree on a level 700m² block, no overlays. The owners want a 42m² open-plan rear extension with a new bathroom. The design fits the setback, height and site coverage standards. A private certifier issues a CDC in about a fortnight, the certifier carries out inspections through construction, and issues the occupation certificate at the end. Total approval cost is a few thousand dollars against a DA process that would have run three to five months.
Pathway three: development application (DA)
Where the work does not meet complying development standards, or where a constraint removes the pathway, the project goes to Wollongong City Council as a development application. Council assesses it on merit against the LEP and the relevant DCP chapters, notifies neighbours, and may refer it internally or externally.
Realistic timeframes: 8 to 20 weeks for a straightforward residential DA, and materially longer where escarpment, heritage or geotechnical referrals are involved. Then you still need a construction certificate before work can start.
Worked example. A miner’s cottage in Bulli within the Old Bulli — Princes Highway conservation area. The owners want a rear extension and a new carport. Because the property sits in a conservation area, complying development is unavailable regardless of how modest the design is. The application needs a heritage impact statement, a design that is visually recessive with a lower roofline than the original, and materials that are complementary but not imitative. Timeframe from lodgement to consent, realistically four to six months.
What removes the CDC pathway in Wollongong
This is the part worth memorising, because it is where local conditions bite hardest.
Heritage conservation areas
Being in a conservation area removes the complying development pathway entirely. Wollongong LEP 2009 identifies nine conservation areas, managed under DCP Chapter E11:
- North Beach Precinct and Belmore Basin — State significance.
- Kembla Heights Mining Village — local.
- Austinmer — Moore Street and The Grove — local.
- Old Bulli — Princes Highway — local.
- Bulli — commercial centre and railway precinct — local.
- Market Street, Wollongong — local.
- Brownsville — Hore Street area — local.
- Garrawarra Hospital, Helensburgh — local.
- Illawarra Escarpment Landscape Area.
Within these areas, consent is required for demolition or relocation of items, alterations affecting exterior detail, fabric or appearance, structural interior changes, new buildings and subdivision. Some minor works remain exempt: internal painting, tightening fixtures, re-hinging doors and gates, replacing broken windows, minor repairs to brickwork, metalwork and roofing, and repainting previously painted external surfaces.
The design controls that most often catch people out:
- Additions must be visually recessive — lower rooflines, setbacks and recesses, and never dominating the original building.
- Materials should be complementary but not imitative. A convincing fake Federation addition is a problem, not a solution.
- Previously unpainted external surfaces should not be painted or rendered except in exceptional circumstances. Rendering a face-brick cottage is generally out.
- Original roofing is retained; replacements must match colour, texture and profile, with corrugated galvanised steel preferred where iron is being replaced.
- Metal-framed windows should be avoided; traditional timber windows are encouraged.
- High solid concrete or masonry front fences are not permitted — low traditional styles matching the building’s period are expected.
- Demolition is a last resort, requiring detailed assessment and a demonstration that adaptive reuse is not feasible.
Bushfire prone land
Complying development is constrained on bushfire prone land, and in Wollongong that covers a long list of escarpment-backed suburbs: Mount Keira, Mount Pleasant, Mount Ousley, Figtree, Austinmer, Thirroul, Coledale, Stanwell Park, Otford and Helensburgh. A bushfire attack level assessment is required, and BAL-29 and above adds materially to cost through shutters, ember screening, upgraded glazing, non-combustible decking and roof sarking.
Flood-affected land
Flood affectation constrains or removes the complying development pathway depending on the classification. Wollongong’s flooding is not only riverine — the escarpment produces significant overland flow, and DCP Chapter E14 governs stormwater management. Adding roof and paved area can trigger on-site detention requirements that were never in the budget.
Escarpment and slope instability
Land recorded in Council’s property database as subject to slope instability, or identified as such by inspection, site review or geological analysis, brings DCP Chapter E12 into play. It is the most consequential local control there is.
Chapter E12 — the geotechnical trigger
Chapter E12 applies to land known or suspected to be subject to slope instability. On that land, a geotechnical impact assessment report is required for most development.
The exemptions matter as much as the trigger:
- Exempt development.
- Complying development.
- Minor building alterations.
- Articulated verandahs and decks.
- Minor earthworks not exceeding 600mm vertical height.
- Minor construction certified as low-risk by a suitably qualified professional.
That 600mm threshold is the single most useful number in the chapter. Designing a terrace, a level pad or a driveway cut to stay under it can be the difference between a project with a geotechnical report and one without. Cutting 560mm is a very different application from cutting 720mm.
Where a report is required, the standards are strict:
- It must be prepared or verified by a geotechnical engineer or engineering geologist with chartered status — CPEng, CPGeo or RPGeo.
- Minimum five years’ experience in Sydney Basin geology.
- Professional indemnity insurance with retroactive cover.
- Reports older than two years require fresh verification before Council will accept them — which catches out buyers who inherit a report with the property.
- Risk to loss of life must be an order of magnitude lower than the tolerable risk for the person most at risk, following the AGS 2007 guidelines.
- Risk to loss of property must be low or very low on the risk matrix; moderate is permissible only with approved mitigation measures.
- Cost: $3,500–$12,000, higher on complex escarpment sites.
The report’s recommendations then drive the engineering — bored piers at $1,200 to $3,000 each, engineered retaining at $600 to $1,600 per square metre of wall face, and specific drainage requirements. It is not a box-ticking document; it sets the structural design.
Chapter B6 — development in the Illawarra Escarpment
If the site sits within the escarpment area, a second layer of control applies through DCP Chapter B6, and it is about how the development looks from the surrounding landscape rather than how it stands up.
- New dwellings and subdivisions generally require a Visual Impact Assessment. For alterations and additions it depends on the nature and location of the work, and Council recommends a pre-lodgement meeting to establish what is needed. Take that recommendation — it is the cheapest way to find out what you are facing.
- Buildings must be restricted to legally cleared areas and contained within a Development Opportunity Envelope.
- Structures must sit to the rear of any landform bench and behind foreground screening vegetation.
- Two-storey buildings are only permitted where screened by foreground remnant vegetation or located on a valley floor. This kills a lot of view-driven designs.
- Removal of remnant vegetation is generally not permitted except in exceptional circumstances. Foreground screening trees and ridge vegetation cannot be cleared.
- Asset Protection Zones for bushfire cannot be achieved through remnant vegetation removal. This is a genuine conflict between two sets of controls, and it has to be resolved at design stage through construction standards rather than clearing.
Anyone planning an escarpment project should treat B6 and E12 as design inputs from the first sketch, not as compliance documents at the end. Designs that ignore them get redesigned.
Mine subsidence — check, but do not panic
People moving from the Hunter often assume Wollongong works the same way on mining. It does not. Most of the Wollongong local government area is not within a declared Mine Subsidence District. The Southern Coalfield’s declared districts sit further inland and north — Picton, Wilton and South Campbelltown.
A related guide to consider while planning this work is Home Extensions in Wollongong: Costs, Approvals and What Works.
- Confirm rather than assume. Check the NSW Planning Portal Spatial Viewer, or contact Subsidence Advisory NSW on 02 4908 4300.
- Where a property is in a declared district, Subsidence Advisory approval is needed in addition to planning approval, and it constrains footing and structural design.
- For the great majority of Wollongong properties this does not apply. The dominant ground hazard in this city is landslip, not subsidence — which is why Chapter E12 exists and why geotechnical reports matter here far more than mining clearances.
BASIX and the $50,000 threshold
BASIX applies to renovation work valued at $50,000 or more. That is a low bar — a kitchen and two bathrooms will cross it — and it applies regardless of pathway.
- A BASIX certificate must accompany the application, setting water, thermal comfort and energy targets.
- The commitments become conditions of consent, so they are enforceable, not aspirational.
- Practical consequences include specified glazing performance, insulation levels, water-efficient fixtures, and often a rainwater tank or a specified hot water system.
- Budget for it early. Discovering at documentation stage that you need double-glazed thermally broken windows at $1,200–$2,200 per m² is an unwelcome surprise.
What to lodge
For a residential DA at Wollongong City Council, expect to prepare:
- Architectural drawings — site plan, floor plans, elevations, sections, and a demolition plan.
- A statement of environmental effects addressing the LEP and each relevant DCP chapter.
- A survey plan prepared by a registered surveyor, showing levels and boundaries.
- A shadow diagram for anything two storeys or affecting neighbouring solar access.
- A BASIX certificate where the $50,000 threshold is crossed.
- A stormwater management plan under DCP Chapter E14.
- A waste management plan.
- Cost of works estimate, which drives fees and the long service levy at 0.35 per cent.
- Specialist reports as triggered — geotechnical impact assessment under E12, Visual Impact Assessment under B6, heritage impact statement under E11, bushfire assessment, flood assessment, or an acid sulfate soils management plan around Lake Illawarra.
Once consent is granted you still need a construction certificate, an appointed principal certifier, and Home Building Compensation Fund cover for any residential building work over $20,000 including GST — issued before work starts or any deposit is paid, providing $340,000 of cover with six years’ structural and two years’ non-structural warranty.
If you are working through costs at the same time, the 2026 Wollongong price guide puts consultant and approval fees in context. Conservation-area owners should read the heritage and character controls guide before drawing anything, and anyone planning to build outwards will find the approval detail in home extensions in Wollongong. Secondary dwellings have their own rules, set out in granny flats: rules, costs and returns, and if the schedule is what worries you, a realistic Wollongong timeline is worth reading before you commit to a completion date.
Working with the system rather than against it
The most useful mental shift is to stop thinking of approvals as an obstacle placed at the end of design and start treating them as the boundary conditions design happens inside. Wollongong’s controls are unusually specific — a 600mm earthworks threshold, a Development Opportunity Envelope, a two-storey restriction tied to screening vegetation, a rule against painting previously unpainted brickwork. Those are not vague planning aspirations. They are numbers and prohibitions you can design to, and designs that respect them go through comfortably.
The projects that get stuck are almost always the ones where someone drew the house they wanted and then went looking for a pathway. On escarpment land in particular, that sequence produces expensive redesigns and long assessment periods. Buying the section 10.7, taking the pre-lodgement meeting, and letting the constraints shape the first sketch rather than the fifth costs very little and routinely saves six figures in wasted design fees and holding costs.
And be honest with yourself about the pathway you are actually on. A complying development certificate is a wonderful thing when it is available. Designing as though it is available when a conservation area, a bushfire mapping or a slope instability record says otherwise is not optimism — it is a delay you have chosen to pay for later.