Block Checker Block Checker

What can you build on your block?

Type your address and we'll tell you what the block can carry today — a duplex, terraces, a manor house, a garden studio — under your council's plan and the state housing policies such as LMR.

All of Greater Sydney, the Blue Mountains, Central Coast, the Hunter (Newcastle, Lake Macquarie, Maitland, Cessnock, Port Stephens), the Illawarra and South Coast to Batemans Bay, Port Macquarie, Coffs Harbour, Byron and Tweed, and Lithgow, Bathurst, Orange, Dubbo and Parkes.
Free, no obligation. Then find a planner, architect, builder or agent who works in your suburb.
A new two-storey duplex on the Northern Beaches, timber screens and surfboards at the gateOne lot, two homes — a Northern Beaches duplex

How it works

  1. Enter the addressThe NSW address service finds your lot — no account, nothing to fill in.
  2. We read the mapsZone and lot-size map, bushfire, flood, heritage, landslip, and the Low and Mid-Rise catchments.
  3. See what it can carryHouse, granny flat, duplex, terraces, manor house — and the pathway for each: DA, CDC or Pattern Book.

Usually 10 to 20 seconds. Free, no account.

What you get back

4 Alexander Street Collaroy (Lot 1//DP1292665)

1,198 m²Area
19.8 mStreet frontage
60 mAverage depth
R2Low density residential

Warringah Local Environmental Plan 2011 · Northern Beaches Council · LEP minimum lot size on the map: 600 m² · outside the state Low and Mid-Rise areas — the LEP controls apply

Constraints on the map

Bushfire: none mapped Heritage: none mapped Flood: none mapped Slope / landslip: Area D · Area A

What your block can take today

✓ One dwelling house permissible in R2
DA-viableCDC-viable
✓ Dual occupancy (two homes) 800 m² / 18 m under the LEP — your lot clears both
DA-viableCDC-viablenot Pattern Book — landslip

2 homes is the most this block can carry on its own — dual occupancy.

Example only — every block is different. This is a real result, run on a real lot.

Try your own address

Who it's for

Owners Is my house worth more as a duplex site than as a home? Check a block
Buyers Check what it can carry before you bid, not after. Check a block
Agents & builders Qualify a listing in one search, with the clause behind it. Check a block
New · Cost Checker

What would it cost to build?

Once you know what your block can carry, see what it costs to build — a new house, a duplex, terraces or a small apartment building — at standard, mid or luxury finish. Indicative Sydney ranges, free, no email needed.

Open Cost Checker

Then find the people for the next step — a planner, an architect, a builder or an agent who works in your suburb.

Reading your block…
Usually 10 to 20 seconds.