One block, two homes. A duplex is the most common way a Sydney house block pays for its own rebuild: keep one, sell one, or sell both. Coast Build builds the pair from your architect's or designer's drawings, through to the occupation certificate.
Most Sydney councils need 450 to 800 m2 and 12 to 18 m of frontage for a duplex; inside the Low and Mid-Rise area the state standard is 450 m2 and 12 m. Block Checker reads your block's controls in a few seconds.
Pick what you are building, the size and the finish and get a Sydney range in ten seconds. No email needed to see the result.
All levels, garages and balconies excluded. Filled in for the type you pick; change it to suit.
Run the address through Block Checker. It tells you what the block can carry under your council's plan and the state housing policies, before anyone draws a line.
Our calculator gives a Sydney range for the type of home, the size and the finish. If the numbers work, we visit the block.
Your architect or designer draws it. We take the drawings through complying development or a development application, with the planner, surveyor and consultants it needs.
One fixed price, one site manager, weekly photo reports, and the occupation certificate on the date we agreed.
Run your address through Block Checker (blockchecker.com.au). It tells you whether a dual occupancy is permitted on your block today.
Both are duplexes. Attached pairs share a wall and suit narrower blocks; a detached pair needs more width and reads as two houses. The block decides, and we draw it both ways if it is close.
The calculator on this page gives a Sydney range for your floor area and finish in ten seconds. A fixed price needs the drawings and a site visit.
Send us the block and what you have in mind. We check what it can carry and what it will cost before you brief an architect.
Also: Terraces and manor houses · Garden studios · New homes and knock-down rebuilds · Renovations and additions