Home builders in Thirroul
Wollongong City Council · Wollongong Local Environmental Plan 2009 · Wollongong & Illawarra Coastal
- Council
- Wollongong City Council
- Planning scheme
- Wollongong Local Environmental Plan 2009
- Overlays mapped here
- Heritage — Item - General · Heritage — Item - Landscape · Heritage — Conservation Area - Landscape
- Residential zones mapped
- R2 Low Density Residential
R3 Medium Density Residential - Heritage items mapped
- 31
- Minimum lot size
- 400-449 m² minimum (most common of 2 minimum-lot-size bands mapped in the suburb)
- Floor space ratio
- 0.5:1
- Land reserved for acquisition
- Infrastructure
- Acid sulfate soils
- Mapped in this suburb
Planning data from NSW ePlanning Spatial Viewer (CC BY 4.0), read 2026-09-14. Suburb-level, not a report on your block — check your address on the NSW Planning Portal.
Worth knowing before you budget
- Floor space ratio
A floor space ratio of 0.5:1 applies to most of the mapped parcels here (10 of 25). On an 800 m² block that is about 400 m² of floor area, every level counted.
- Land reserved for acquisition
Parts of Thirroul are reserved for future public acquisition — infrastructure. A reservation is mapped to specific land, so whether it touches your block has to be checked at the address.
Builders serving Thirroul
None yet — tell us what you're building and we'll go and find one.
What building in Thirroul actually involves
Thirroul is a narrow coastal strip between the Illawarra escarpment and the sea, mapped R2 Low Density and R3 Medium Density, with a 0.5:1 floor space ratio and a landscape conservation area.
Squeezed between escarpment and ocean
That geography is the constraint. Blocks against the escarpment carry slope, vegetation and drainage from above; blocks near the beach carry salt exposure and, in eight mapped places, acid sulfate soils. Very few streets in Thirroul are simply flat and unremarkable.
The conservation area protects the setting
Like Figtree, Thirroul's conservation area is a landscape one — it covers the setting and vegetation rather than a built streetscape. On a suburb this constrained it bears directly on where a house can sit and what can be removed to make room for it.
Eight acid sulfate features
They follow the low ground and the creek lines running off the escarpment. Where they apply, disturbing the soil brings a management requirement and an earthworks cost worth pricing properly.
What to ask a builder
Ask whether the block is escarpment-side or beach-side, because the cost drivers differ completely. Ask what 0.5:1 gives on the block. And ask what corrosion category the external hardware is specified to.
Local landmarks in Thirroul
- Robinsville Reserve
- Thomas Gibson Park
- Robert Rankin Park
- Armagh Reserve
- Woodward Memorial Park
- W F Jackson Park
- Tingara Park
- Thirroul Reserve
Questions about building in Thirroul
What zone is Thirroul?
R2 Low Density Residential and R3 Medium Density Residential. The zone matters, but on a strip this narrow the geography is what decides the cost.
How much house can I build?
The mapped floor space ratio is 0.5:1 — half the site area across every level. The minimum lot size band is 400–449 m², the most common of two mapped.
What is the landscape conservation area?
A heritage conservation area protecting the setting and vegetation rather than a built streetscape. On a constrained suburb it bears directly on siting and what can be removed.
Are acid sulfate soils an issue?
Eight features are mapped, following the low ground and the creek lines running off the escarpment. Where they apply, disturbing the soil brings a management requirement.
Escarpment side or beach side — which is harder to build on?
They are hard in different ways. Escarpment blocks bring slope, vegetation and drainage from above; beach blocks bring salt exposure and acid sulfate soil. Neither is a flat suburban lot.