How to save money when Building a House

6 Feb

Written By Build Together Project Management

Everyone thinks the secret to saving money on a build is finding a good builder and sticking to the plan.

But here's what actually happens:

You sign your contract. Construction starts. Then three months in, your builder says the timber you picked isn't available anymore. Or the window supplier can't deliver on time. Or there's unexpected site costs because of soil conditions.

Each time, you're hit with a variation. Each one feels small. But they add up fast.

By the time you're holding the keys, you've spent $40,000 more than you budgeted.

And you thought you were being careful.

The real problem isn't bad luck, it's your building contract

Most people think cost blowouts happen because of poor planning or builders. But in my time reviewing building contracts, I've learned something different.

The real issue is this: your contract doesn't protect you from the things that actually go wrong during a build.

Here's what I mean.

A client came to me last year, about to sign with a well-known builder. The contract looked fine on the surface. Industry standard, the builder said.

But when I dug into it, I found clauses that would let the builder pass almost any price increase onto her. Material delays? Her problem. Supplier issues? Her problem. Site conditions that "should have been anticipated"? Also her problem.

She would have been on the hook for every single variation, with no way to challenge them.

We renegotiated five key clauses before she signed. During the build, when her builder tried to charge her $8,000 for timber price increases, we pointed to the contract. It clearly stated that material fluctuations did not incur variation costs.

She didn't pay a cent.

The hidden places your contract lets money slip away

After reviewing hundreds of building contracts, I've noticed the same gaps show up over and over:

Vague definitions of what's included in the fixed price, leaving room for surprise charges
Weak protections around provisional sums, so any increase gets passed straight to you
No clear process for approving variations, meaning you find out about costs after the work is done
Extension of time clauses that don't cap builder costs during delays
No requirement for evidence when the builder claims something wasn't included in the original scope

These aren't obvious when you first read the contract. They're buried in language that sounds reasonable until something goes wrong.

And by then, it's too late.

What a quality contract actually looks like

A quality build doesn't come from luck. It comes from a quality contract.

When I review a contract, I'm not just checking that it's "industry standard". I'm looking for the clauses that will protect you when things don't go to plan.

Because things will not go to plan. They never do.

Here's what changes when you have the right protections in place:

Clear definitions of included work mean fewer surprise costs
Fixed provisional sums with caps prevent price escalation getting out of control
Documented variation processes mean no work starts without your written approval
Fair extension of time clauses mean delays don't automatically cost you thousands
Quality control checkpoints give you leverage to fix problems before final payment

One of my clients saved $23,000 during her build simply because we added a clause requiring the builder to provide three quotes for any variation over $5,000. Suddenly, those vague "unforeseen works" charges disappeared.

The contract gave her the power to say no.

What to do next

If you're about to sign a building contract, or you've already received one from your builder, the single best investment you can make is getting it checked before you sign.

Not by a friend who's built before. Not by googling the clauses yourself.

By someone who reviews these contracts every single day and knows exactly what to look for.

A Building Contract Health Check will show you: