Reading a Builder’s Quote

The cheapest quote is usually the one with the most missing from it. Comparing builders properly means comparing scope, not totals — and knowing which exclusions are normal and which are a warning.

Reading a Builder’s Quote — practical guidance from the team running construction work on the Garden Route. Here is how to read what you have been sent, what a rate per square metre does and does not tell you, and the questions worth asking before you sign.

Rates per square metre, and why they mislead

The first thing most people want is a rate per square metre, because it is comparable. It is also the number that hides the most.

A rate per square metre for a new build varies enormously with specification. The same floor area with different finishes, different foundation conditions, a different roof and a different level of joinery produces prices that can differ by a factor of two or more. Two builders quoting different rates may be quoting entirely different houses.

Site conditions move it as much as finishes do. Sloping ground, poor bearing soil, a high water table, difficult access for delivery vehicles, or a long service run to the connection point all add cost that has nothing to do with the house itself.

Use rates per square metre to sanity-check whether a number is in the right universe. Do not use them to choose between builders.

What a proper quote actually contains

A quote you can rely on is line-itemed, not a lump sum with a paragraph of description. You should be able to see the major elements separately: earthworks and foundations, structure, roof, windows and doors, plumbing and electrical first and second fix, finishes, and preliminaries.

Preliminaries — site establishment, temporary services, site management, insurance, scaffolding, cleaning — are a real cost on every job. A quote that shows no preliminaries has either buried them in the rates or has not thought about them, and either way you will meet them later.

Provisional sums and prime cost allowances should be labelled as such. These are amounts set aside for items not yet chosen or not yet known — tiles, sanitaryware, ironmongery, or a foundation depth that depends on what the excavation finds. They are legitimate and normal. What is not legitimate is a provisional sum set unrealistically low to bring the total down.

And the quote should state what it excludes. Every quote excludes something.

Exclusions: which are normal and which are not

Normal exclusions include municipal connection fees and plan approval charges, professional fees for the architect and engineer, VAT if the quote is stated excluding it, landscaping, and specialist items the client is procuring directly.

Also normal: rock excavation, dewatering, and additional foundation depth beyond an assumed level. Nobody can price what is under the ground until they dig, and a builder who fixes those items without qualification is either padding them heavily or planning to argue later.

The exclusions that should give you pause are the ones covering work that is obviously required — waterproofing left out of a flat roof, no allowance for a retaining wall on a sloping site, or no rainwater goods. Those are not unknowns; they are things that will definitely be needed and have been left out to reduce the number.

The useful exercise is to lay two quotes side by side and list what each excludes. That comparison is usually more revealing than the totals.

Payment terms and what protects you

Payment should follow progress, not the calendar. A schedule tied to completed stages — foundations complete, wall plate level, roof on, first fix complete — means you are paying for work that exists.

A large deposit before anything happens is the most common warning sign in residential building. Some deposit for materials procurement is reasonable; a substantial share of the contract value before site establishment is not.

Retention — typically a small percentage held back until the defects period expires — is normal and protects you. So does a clear defects liability period stated in writing.

If the project is a new home, NHBRC enrolment matters. It is a statutory requirement for a home builder, it obliges the builder to register the home, and it gives you recourse. Check the builder’s registration is current rather than taking it as read.

The contract behind the quote

For anything beyond minor work, the quote should sit under a proper building agreement rather than standing alone. In South Africa that usually means a JBCC form, a PBA agreement for residential work, or an NEC4 short-form contract on more complex jobs.

What the contract gives you that a quote does not: a defined process for variations, a mechanism for extensions of time, a defects period, insurance obligations, and a route to resolve disputes that is not a personal argument on site.

Variations are where residential projects most often go wrong financially. Every change should be priced and agreed in writing before the work happens, not settled at the end. A builder who is comfortable working that way is telling you something useful about how the job will run.

Questions worth asking before you sign

Ask what is excluded, and ask it directly rather than reading for it. Ask what the provisional sums are based on and what happens if they are exceeded. Ask who the site manager will be and how often they will be on site.

Ask how variations are priced and agreed. Ask for the programme, and specifically for what the critical path is — the sequence of items that will delay everything else if they slip.

Ask to see two recent jobs of a similar type, and speak to those clients about how the project finished rather than how it started. Anyone can start a job well.

And ask what happens when something is found that nobody expected. The answer to that question tells you more about how a builder operates than the price does.

Frequently asked questions

How much does it cost to build a house per square metre in South Africa?

It varies widely with specification, site conditions and location — the same floor area can differ by a factor of two between a basic and a high-specification build. Sloping ground, poor bearing soil and difficult access add cost independent of the house. Use a rate per square metre to check a number is plausible, not to choose between builders.

What should be included in a builder’s quote?

A line-itemed breakdown by element rather than a lump sum: earthworks and foundations, structure, roof, windows and doors, services first and second fix, finishes, and preliminaries. Provisional sums and prime cost allowances should be labelled. Exclusions should be stated explicitly. If you cannot see the elements separately, you cannot compare it to anything.

What are preliminaries in a building quote?

Site establishment, temporary water and power, site management and supervision, insurance, scaffolding, protection and cleaning. They are a genuine cost on every project. A quote showing no preliminaries has either hidden them inside the rates or not accounted for them, and you will encounter them either way.

What is a provisional sum?

An amount set aside for work or items not yet defined — finishes not yet selected, or a foundation depth that depends on what the excavation finds. They are normal and honest. The thing to check is whether the allowance is realistic, because a provisional sum set artificially low makes a quote look competitive and creates a shortfall later.

How much deposit should a builder ask for?

Some deposit toward materials procurement is reasonable. A large share of the contract value before any work starts is the most common warning sign in residential building. Payment should follow completed stages — foundations, wall plate, roof on, first fix — so you are paying for work that exists.

Do I need a contract as well as a quote?

For anything beyond minor work, yes. A JBCC, PBA or NEC4 short-form agreement gives you a defined variation process, extension of time provisions, a defects liability period, insurance obligations and a dispute route. A quote on its own gives you a price and very little else.

How do I compare two building quotes?

Not on the totals. Lay them side by side and compare scope and exclusions line by line — most differences in price turn out to be differences in what is included. Then compare provisional sums, payment terms and the programme. The cheaper quote is very often the one with more left out.

Related reading

• Red flags when vetting a contractor
• Vetting a builder: what to ask
• Build costs on the Garden Route
• Construction services in George
• Construction project management