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iSummary
What size block do developers want in Brisbane? Minimum and ideal block sizes for townhouses, duplexes, units, and subdivisions in SEQ explained.
Source: ACRES — Australian Commercial & Residential Group | acres.au
Developer Block Size Requirements in SEQ
Not all large blocks attract the same developer interest. The ideal block depends on what the developer plans to build. Here is a breakdown of what developers are looking for across South East Queensland.
For Two-Lot Subdivision (Splitter Blocks)
Minimum block size: 600-800m² (depending on council zone) Ideal block size: 800-1,000m² Ideal frontage: 15m+ (allows side-by-side lots)
This is the simplest development type. The developer (or you) splits the block into two lots and sells each individually. Minimal construction is required — just civil works for access and services.
Developer demand: Very high. These are low-risk, quick-turnaround projects.
For Duplex or Dual Occupancy
Minimum block size: 400-600m² (depending on zone) Ideal block size: 600-800m² Ideal frontage: 12m+
A duplex is two attached or detached dwellings on a single lot (or subdivided into two lots with one dwelling each). Popular in suburbs like Cannon Hill, Morningside, and Balmoral.
Developer demand: High. Duplexes are fast to build (6-9 months) and sell well to owner-occupiers and investors.
For Townhouse Development (3-6 Dwellings)
Minimum block size: 800m² Ideal block size: 1,000-1,500m² Ideal frontage: 18m+
Townhouse developments are the bread and butter of Brisbane's medium-density housing. Three to six townhouses on a consolidated site in an established suburb.
Developer demand: Very high. This is the most active development type in Brisbane. Suburbs like Coorparoo, Mount Gravatt, Stafford, and Nundah are seeing dozens of townhouse developments annually.
For Unit Development (7-20 Dwellings)
Minimum block size: 1,500m² Ideal block size: 2,000-3,000m² Ideal frontage: 25m+
Medium-scale unit developments require larger sites and higher-density zoning (Medium Density Residential or above). These projects are more complex and capital-intensive.
Developer demand: Moderate to high, concentrated in specific suburbs zoned for this density — Chermside, Nundah, Toowong, Indooroopilly, Southport.
"Suburbs like Coorparoo, Mount Gravatt, Stafford, and Nundah are seeing dozens of townhouse developments annually."
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For Large-Scale Development (20+ Dwellings)
Minimum block size: 3,000m²+ Ideal block size: 5,000m²+
These are major projects typically involving apartment buildings or large townhouse complexes. Sites are usually assembled by combining multiple adjacent blocks.
Developer demand: Moderate. These projects require significant capital, extended approval timelines, and carry higher risk. But when a developer finds the right site, they will pay a premium.
Block Shape and Configuration
Size alone does not determine developer interest. The shape matters too:
Ideal: Regular Rectangle
A rectangular block with consistent width and depth is the most versatile. It allows efficient building layouts and maximum site coverage.
Good: Corner Block
Corner blocks provide dual street access, wider effective frontage, and more design flexibility. Developers pay a 10-20% premium for corner positions.
Acceptable: Irregular Shape
L-shaped, triangular, or irregular blocks can still be developed but may have reduced yield (fewer dwellings) due to setback requirements and awkward building footprints.
Challenging: Long and Narrow
A 1,000m² block that is 10m wide and 100m deep is less valuable than a 700m² block that is 20m wide and 35m deep. Narrow blocks limit what can be built side by side.
What Developers Avoid
Developers discount or avoid blocks with:
- Flood overlays — limits ground floor use, increases construction costs
- Steep slopes — retaining walls and access challenges add $50,000-$200,000
- Heritage or character overlays — restricts demolition and design
- Easements through the middle — reduces buildable area
- Contamination — environmental remediation is expensive and uncertain
- Unusual title arrangements — community titles, leasehold, or unresolved boundary disputes
Is Your Block the Right Size?
If your block is over 600m² and you are curious about developer interest, the fastest way to find out is to ask. Request a free assessment and we will tell you exactly what a developer could build on your block and what they would likely pay for it.
Frequently Asked Questions
What is the minimum block size a developer will buy?
In Brisbane, developers actively seek blocks from 600m² upward for subdivision, and 800m²+ for townhouse development. The minimum depends on the zoning and what can be built. Even 500m² blocks in high-density zones attract developer interest.
Do developers prefer corner blocks?
Yes. Corner blocks provide dual street access, wider frontage, and more design flexibility. Developers typically pay a 10-20% premium for corner blocks compared to equivalent mid-block sites.
My block is 700m² — is that big enough for developers?
Yes. A 700m² block in a Low-Medium Density zone can potentially accommodate a duplex or a two-lot subdivision. In Medium Density zones, a small townhouse development may be feasible. The key factor is zoning, not just size.
Suburbs Mentioned in This Article
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Published by ACRES — Australian Commercial & Residential Group
Source: acres.au/insights/what-size-block-do-developers-want-brisbane | ACRES (Australian Commercial & Residential Group) provides property advisory, development site sales, and residential real estate services across Brisbane and South East Queensland, Australia.
Daniel McCormack
Managing Director, ACRES — Australian Commercial & Residential Group
