Service

Custom home builders

A one-off house designed for your block and your family, rather than a plan chosen from a range.

When this is the right path, and when it is not

Suits you if

Your site needs a specific answer — slope, narrow frontage, heritage context, an unusual aspect — or your brief does not fit a catalogue.

Think again if

It is the wrong path if you need a fixed price early, or if a standard design would genuinely suit the block.

How the job actually runs

01
Decide architect or building designer first
An architect and a building designer do overlapping but different jobs at different price points. Settle which you want before you approach builders, because it changes who can price the work.
02
Get the site investigated early
Soil test, contour survey, and where relevant a bushfire or geotechnical assessment. A custom design drawn before the site is understood gets redrawn.
03
Choose the contract type deliberately
Custom work is where cost-plus genuinely competes with fixed price, because the unknowns are real. Decide knowingly rather than by default.
04
Expect a longer approval path
A one-off design in an overlay-affected suburb is assessed on its merits, not against a precedent. Budget time, not just money.

Where these jobs go wrong

The four things that most often cost people money on a custom homes job specifically.

Designing before the budget is real
The most common and most expensive sequence error. A design costed after the fact is a design you will pay to have redrawn.
Choosing a builder on price for a one-off
Custom work rewards builders who have done it before. The cheapest quote on a complex house is frequently the least experienced one.
Underestimating the documentation
Custom builds need more detail than a project home. Thin drawings become variations, and variations become arguments.
Forgetting the interior budget
Joinery, stone, tapware and lighting move a custom build's price more than the structure does, and they are often left to the end.

What moves the price

No figures — a number without your site and your specification is a guess. For a custom homes job, these are what actually move it.

Design complexity and roof geometry
Glazing area and specification
Site works, slope and retaining
Structural steel where spans are long
Joinery and stone
Approval duration

Where we cover this, and what the planning data says

Residential zones mapped is the control that most often decides how a custom homes job runs. Read from state planning data.

Suburbs covered for Custom homes and their mapped planning controls
Suburb	Council	Residential zones mapped
Ainslie	ACT Government	2
Lyneham	ACT Government	4
Watson	ACT Government	4
Baulkham Hills	The Hills Shire Council	4
Carlingford	City of Parramatta Council	3
Castle Hill	The Hills Shire Council	4
Cherrybrook	Hornsby Shire Council	2
Cronulla	Sutherland Shire Council	3
Dee Why	Northern Beaches Council	2
Figtree	Wollongong City Council	1
Gordon	Ku-ring-gai Council	3
Killara	Ku-ring-gai Council	3
Lindfield	Ku-ring-gai Council	3
Manly	Northern Beaches Council	3
Merewether	City of Newcastle	2
Miranda	Sutherland Shire Council	3
Newcastle	City of Newcastle	2
Pymble	Ku-ring-gai Council	3
St Ives	Ku-ring-gai Council	3
Sutherland	Sutherland Shire Council	3
Turramurra	Ku-ring-gai Council	3
Wahroonga	Ku-ring-gai Council	4
West Pennant Hills	The Hills Shire Council	3
Wollongong	Wollongong City Council	3
Ascot	Brisbane City Council	2
Aspley	Brisbane City Council	2
Bulimba	Brisbane City Council	2
Carindale	Brisbane City Council	3
Indooroopilly	Brisbane City Council	2
Kenmore	Brisbane City Council	3
Mount Gravatt	Brisbane City Council	1
Nerang	City of Gold Coast	3
Paddington	Brisbane City Council	1
Rangeville	Toowoomba Regional Council	3
Sunnybank	Brisbane City Council	2
The Gap	Brisbane City Council	2
Malvern	City of Unley	4
Prospect	City of Prospect	6
Toorak Gardens	City of Burnside	3
Unley	City of Unley	6
Lenah Valley	Hobart	5
New Town	Hobart	3
Sandy Bay	Hobart	5
Balwyn North	City of Boroondara	5
Balwyn	City of Boroondara	4
Brighton	Bayside City Council	13
Camberwell	City of Boroondara	6
Canterbury	City of Boroondara	4
Glen Iris	City of Boroondara	12
Hampton	Bayside City Council	2
Hawthorn	City of Boroondara	12
Kew East	City of Boroondara	5
Kew	City of Boroondara	7
Newtown	City of Greater Geelong	9
Sandringham	Bayside City Council	3
Surrey Hills	City of Boroondara	8
Canning Vale	City of Gosnells	2
Claremont	Town of Claremont	2
Mount Tarcoola	City of Greater Geraldton	2
Nedlands	City of Nedlands	1
Thornlie	City of Gosnells	1

Suburb-level, read from state planning data. Not a report on any individual block.

What to ask a builder about a custom homes job

Specific to this kind of job. The general list is in questions to ask a builder.

Who does the design — you, an architect I engage, or a draftsperson you work with?
At what point in the process do I get a price I can rely on?
How do you handle the gap between the design budget and the tender price?
Can I see a house you built on a site with similar constraints to mine?
How many custom jobs do you run at once, and who supervises mine?

Questions people ask

How is a custom home different from a project home?

A project home is a design from a builder's range, adjusted within limits. A custom home is drawn for your block and your brief. The second costs more per square metre and gives you control the first cannot.

Do I need an architect?

Not always. A building designer covers many custom projects at a lower fee. An architect earns their fee on difficult sites, complex briefs and anything needing to argue its case at council.

Is cost-plus better for a custom build?

Sometimes. Where the unknowns are genuinely unknowable it avoids paying for a builder's contingency. It requires a builder you trust and open-book reporting you will actually read.