Mixed Use dominant. Median sale $1.83M over the last 24 months. 84% of decided DAs approved.
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Zoning
Illawong is dominated by C4 — Mixed Use. Land use rules, height, FSR, and permitted developments are set per zone in the Local Environmental Plan and refined by the Development Control Plan.
Limit varies by lot — check your address for the exact figure.
Floor Space Ratio — total floor area as a multiple of lot area.
Location
Illawong 2234 covers an undefined area within Sutherland Shire Council.
Drill into any lot in Illawong
Open the interactive map — click any address to see its zone, height, FSR, overlays, and approval likelihood.
Development potential
We score every lot for development signal — under-built relative to the controls, eligible for a granny flat, or sized for subdivision.
lots with remaining GFA capacity
under SEPP (Housing) 2021
lots that may support subdivision
show at least one development signal
average uplift signal across the suburb
Theoretical capacity if every lot built to its limit: 18,618 dwellings, with 1,370,865 m² of unused GFA across the suburb.
Own a property in Illawong?
Check your lot's exact development potential — height, FSR, granny flat, subdivision, dual-occ.
Constraints & risks
54% of lots are bushfire-prone — a bushfire assessment is likely required; also: 1% of lots carry heritage controls; 0.9% of lots intersect a Threatened Ecological Community.
Suburb-wide percentages — your specific lot may have all, some, or none of these.
Mapped flood-prone land
RFS bushfire-prone land mapping
Heritage item or Conservation Area
Within 100 m of EPA-listed site
Mapped TEC vegetation
Coastal hazard mapping
ANEF / aircraft noise
Electrician · serves Illawong, NSW
730 Old Illawarra Rd, Illawong NSW 2234
Market
Sales, rent, and yield data drawn from NSW Property Sales Information and rental bond data over the past 24 months.
DA activity
63 development applications for Illawong addresses were decided by Sutherland Shire Council over the past 24 months. 53 approved — a 84% approval rate. Average processing time: 102 days.
Demographics & lifestyle
ABS Census 2021 population data combined with lot-level amenity, healthcare, lifestyle, and crime indices.
Walkable amenity within 1 km
GP / hospital / pharmacy proximity
Cafés, parks, schools, transport
ZoneDSS Marketplace
13 businesses serving Illawong and nearby.
Electrician
730 Old Illawarra Rd, Illawong NSW 2234
Landscaper
Burley Cl, Illawong NSW 2234
Pest control service
2/273 Fowler Rd, Illawong NSW 2234
Home builder
28 Old Ferry Rd, Illawong NSW 2234
Cleaning service
17 Cygnet Pl, Illawong NSW 2234
Gardener
44 Mariner Rd, Illawong NSW 2234
Run a local business? Get found by property owners researching Illawong.
List your business — freeFAQs
Illawong is dominated by the C4 (Mixed Use) zone, which covers 1,871 of 2,491 lots (76%). The full mix is: C4 Mixed Use (76%), C3 Commercial Core (13%), C2 Centre Support (6%), R2 Low Density Residential (5%), RE1 Public Recreation (1%).
Across Illawong, the average maximum building height is 8.0 m and the average maximum Floor Space Ratio (FSR) is 0.53:1. Individual lots can vary materially — height and FSR are set per zone in the Local Environmental Plan (LEP) and can be modified by overlays. For an exact figure on a specific address, generate a planning report.
Yes — 117 lots in Illawong appear eligible for a granny flat under SEPP (Housing) 2021, based on lot size, zoning, and frontage. Eligibility is lot-specific: get a planning report on your address to confirm.
The median sale price in Illawong over the past 24 months is $1,825,500, across 148 sales. Median unimproved land value is $995,000.
Median weekly rent for a house in Illawong is $923. Gross rental yield works out to 2.4%.
Sutherland Shire Council decided 63 development applications for Illawong addresses over the past 24 months, with 53 approved (84% approval rate). Average processing time is 102 days. Processing time depends heavily on application complexity, council backlog, and whether the application requires referral to other agencies.
Across Illawong, 1% with heritage controls, 53.9% bushfire-prone. These are suburb-wide percentages — every lot has its own combination. A planning report on a specific address shows exactly which controls apply.
2,351 of 2,491 lots in Illawong show identifiable development potential — under-developed for the planning controls, eligible for a granny flat, or capable of subdivision. Average rezoning signal score: 15.9 / 100.
Continue exploring
Compare zoning, development potential, and DA activity across other suburbs in Sutherland Shire Council and nearby postcodes.
Landscaper · serves Illawong, NSW
Burley Cl, Illawong NSW 2234
Suburb-wide stats are useful for context. For a buy-or-walk decision on a specific lot, you need every control, every constraint, and every clause cited to source.
Run a report — from A$2914-section report · LEP + SEPP + DCP cross-referenced · cited to source
Verify with official sources
Don't take our word for it. Every figure on this page is computed from authoritative New South Wales Government data — and you can verify any of it directly with the source.
Official zoning, height, FSR, and overlay maps for any NSW address. The primary source for everything on this page.
planningportal.nsw.gov.au
Cadastral lot boundaries, aerial imagery, easements, and environmental overlays from NSW Spatial Services.
maps.six.nsw.gov.au
State-listed heritage items and Heritage Conservation Areas. Search by suburb to see what's listed in Illawong.
hms.heritage.nsw.gov.au
Sites notified to the EPA under the Contaminated Land Management Act. Critical for due diligence on any address.
apps.epa.nsw.gov.au
Rural Fire Service map of bushfire-prone land categories. Triggers BAL assessment requirements for new builds.
rfs.nsw.gov.au
Australian Bureau of Statistics QuickStats for postcode 2234 — population, age, household composition, income, tenure.
abs.gov.au
Zoning, height, FSR, and overlays parsed from the Sutherland Shire Council Local Environmental Plan, applicable State Environmental Planning Policies, and the Development Control Plan. Property sales drawn from NSW Property Sales Information. DA history aggregated from the NSW Planning Portal. Heritage, flood, bushfire, contaminated land, TEC, sea-level rise, and aircraft noise overlays from the NSW Spatial Services and EPA registers. Population, age, income, and tenure from ABS Census 2021. Aggregated by ZoneDSS · last updated 2026-04-27.
Suburb-wide statistics — your specific lot may vary. Always run a planning report on the actual address before making a decision. How ZoneDSS works →