A living room, a study or fifth bedroom, an ensuite and a laundry — joined to the back of the house by a link. Built in Ngunnawal on a 407m² block, which is small, and that is rather the point.

Walk through the finished extension. This one is built — everything you are looking at exists.

What it does to the house

The house you havebefore

→

+50.2 m² living room · study/bedroom · ensuite · laundry

This is the difference between an extension and a second dwelling. You are not building another home on your block — you are making the one you live in bigger. Same address, same title, same front door.

What it costs

$306,029build

$34,150planning & approvals

$21,866utility connections

$362,044total, including GST

The price of the design as it was built. Your block will move it — access, slope, what is already there — which is what the first conversation is for.

✓ No Lease Variation Charge on an extension

An extension adds floor area. It does not add a dwelling, so there is nothing to vary in your Crown lease and no charge to pay.

Put a second dwelling on the same block instead and the Lease Variation Charge can be $49,000 for every home the lease ends up allowing. On a two-home block that is $98,000 before you have built anything. Work out the charge on your block — it is free, and it is the number most people find out about far too late.

The finished extension

Design 1134 extension in Ngunnawal, view 1

Design 1134 extension in Ngunnawal, view 2

Design 1134 extension in Ngunnawal, view 3

Design 1134 extension in Ngunnawal, view 4

The floor plan

Floor plan showing the existing residence, the link and the new rooms

The plan names the existing residence and the link separately, so you can see exactly which part is new.

Will it fit on your block?

Floor area added	50.2 m²
Footprint	10,180 mm × 5,480 mm
Shape	L-shaped
Built on a block of	407 m²
Plot ratio it used	35.21 %
Private open space left	205 m² against 194 m² required ✓ 11.4 m² over, a 6% margin
Ceiling	Raked
Shower	No bath - 1100 x 1200 shower

These are the measurements from the approved plans for the block it was built on. Yours will be different — Check my block works out what your own block allows.

Is this the one?

Tell us your address and we will say what this extension would look like on your block, what it would cost there, and whether it needs approval.

Ask about this extension Check my block first

Design 1134. Built in Ngunnawal and photographed as finished. Price approved in the Design Engine and shown as built; it is not a quote for your block. Floor areas and measurements are taken from the approved plans. Canberra-wide, 1300 979 658.