Suburb guide · 2487
Can I build a duplex or granny flat in Casuarina?
Casuarina sits in Tweed Shire Council's area under Tweed Local Environmental Plan 2014. We ran 25 real Casuarina addresses through the checker: the typical block is 660 m² with 17.2 m of frontage, 22 of the 25 could add a granny flat, and 1 could carry two separate homes today.
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The typical Casuarina block
The middle block of the 25 we checked is 660 m² with 17.2 m of street frontage. The smallest was 530 m² and the largest 1,191 m². Zones in the sample: R2 (20), R1 (5).
The 25 blocks we checked, by land size.
What homes sell for in postcode 2487
Median sale prices for the whole of postcode 2487, January to March 2026. These cover every suburb sharing the postcode, not Casuarina alone, and they are not a value for any one block.
- Houses: $2.19m (36 sales)
- Units and apartments: $1.14m (60 sales)
Source: NSW Government Rent and Sales Report (Department of Communities and Justice), sales tables by postcode, NSW Government. Updated each quarter.
A granny flat
22 of the 25 blocks we checked could take one. Tweed LEP cl 5.4(9) — the greater of 60 m² or 20% of the house’s total floor area, parking excluded. Separately, the state Housing SEPP allows a granny flat of up to 60 m² through the ten-day complying-development route on a lot of 450 m² or more with a 12 m frontage, where the land is not flood, bushfire or heritage constrained.
Dual occupancy (duplex) rules in Casuarina
1 of the 25 blocks we checked could carry two or more separate homes today.
Under Tweed Local Environmental Plan 2014 a dual occupancy needs 900 m² — this LEP sets no frontage minimum, so Council's DCP governs width.
Of the 20 ordinary R2 blocks in our sample sitting outside the Low and Mid-Rise area, 1 had the 900 m². There is no LEP frontage test to pass here, but Council's DCP still judges width, setbacks and private open space, so clearing the area alone does not settle it.
What else turned up
6 of 25 were on bushfire-prone land. Any of those takes a block out of the fast-track routes and into a full DA, so it changes the answer more than the lot size does.
How we got these numbers
We took 25 real Casuarina street addresses from the NSW geocoder and ran every one through the same engine this site runs for you, reading the planning controls live. Nothing here is modelled or estimated.
It is a sample, not a census. The addresses are a spread across what the geocoder returns, so treat these as "of the 25 blocks we checked" rather than a figure for every block in Casuarina. Your own block is the only one that answers for itself — that is what the box on the right is for.
Enter the address — lot, frontage, zone, constraints and what it can carry.