What is a normal markup for a builder in the UK?

A general builder typically adds 15–25% for overheads and profit on top of the raw cost of labour and materials, plus a separate 10–20% markup on materials they buy and supply. These are normal, fair bands. They cover the real cost of running a building business and a reasonable profit. A markup meaningfully above these bands is not automatically unfair, but it should be explained by something concrete.

How much do builders mark up materials?

Usually 10–20%. This is fair, because the builder sources the materials, transports and stores them, carries the cost until you pay, handles returns of surplus, and stands behind them if something is faulty. A materials markup well above 20%, or a materials figure far above what the same items cost at a builders’ merchant, is the kind of line worth questioning.

What does “overheads and profit” actually cover?

Overheads are the costs of being in business whether or not any single job is profitable: van, fuel, public liability insurance, tools and plant, office and admin, accountancy, and tax. Profit is what is left for the builder after all of that. Together they typically run 15–25%. It is a legitimate and necessary part of the price, not a hidden charge bolted on.

Is a higher markup ever justified?

Yes. A higher margin can be justified by a premium specification, an insurance-backed guarantee, a longer warranty, employed (rather than cash-in-hand) labour, genuinely difficult access, or simply a busy, established builder who does not need the work. The test is not the size of the markup on its own, but whether you can point to something real that it buys.

What is a fair builder’s markup?

What UK builders actually add for overheads, profit, and materials, the normal 15–25% and 10–20% bands, when a higher markup is justified, and how to tell a fair margin from one that is quietly inflating your quote.

A calculator and building plans on a desk. — Photo by Sven Mieke on Unsplash

"Markup" sounds like the part of the price you are being overcharged. It is not. A builder who adds nothing to the raw cost of labour and materials is a builder who is not running a viable business, and a business that is not viable is one that will not be there to honour a warranty. The right question is not whether a builder marks up, but whether the markup is in the normal range and buys you something real.

This guide explains the two markups on a typical UK quote, what is normal, and how to spot a margin that has quietly become an inflated price.

The two markups#

There are two separate things people mean by "markup," and a fair quote contains both.

Overheads and profit (O&P): typically 15–25%. This is added to the whole job and covers the cost of being in business, plus profit. Overheads are the costs that exist whether or not a given job makes money: van, fuel, public liability insurance, tools and plant, office, admin, accountancy, and tax. Profit is what is left after all of it.

Materials markup: typically 10–20%. This is added to the materials the builder buys and supplies. It is fair because the builder sources them, collects and stores them, carries the cost until you pay, returns the surplus, and stands behind them if they are faulty. Buying everything yourself to avoid this markup often costs more in delays, wrong orders, and lost warranty cover. See can I supply my own materials for the trade-offs.

What the overheads actually pay for#

It is easy to look at a 20% O&P line and see pure profit. Most of it is not. A legitimate building business is carrying:

Public liability insurance (commonly £2m–£5m of cover)
Employer’s liability insurance if they have staff
Vehicles, fuel, tools, and plant hire
Office, admin, software, and accountancy
Tax, and time spent quoting jobs that do not convert

The profit that remains after all of that is the builder’s actual income. A quote with a healthy O&P line is usually a quote from a business that will still exist when you need it.

When a higher markup is fair#

A margin above the normal band is not automatically a problem. Rule these in before you object:

Premium specification. Better materials and finishes cost more, and a builder pricing them carries more risk.
Insurance-backed guarantee or longer warranty. Real protection that costs the builder money to provide.
Employed labour rather than cash-in-hand. Properly employed, insured trades cost more and protect you more.
Difficult access or an awkward site. Genuinely raises the fair price.
A busy, established builder. Trades in demand price higher because they do not need the work. That is a high price, not an unfair one.

When a markup has become an inflated price#

The warning sign is margin with nothing to show for it. If an itemised quote shows a gap between raw cost and total that is well above 25%, and the builder cannot point to a premium spec, better insurance, or a real warranty, the markup is doing the work of an inflated price. The other warning sign is a lump-sum quote with no breakdown at all, which hides the margin so you cannot judge it. The fix for that is to ask for an itemised version. See how to read a builder’s quote.

How to check the margin yourself#

On an itemised quote:

Add up the raw labour (days times a normal regional day rate).
Add the materials at roughly trade price (spot-check the big items).
Compare that subtotal to the quoted total. The gap is roughly the O&P.
Express the gap as a percentage of the subtotal.
If it is in the 15–25% band, the margin is normal. If it is well above with no justification, that is your line to question.

The bottom line#

A fair builder’s markup is the price of a builder who will turn up, be insured, finish the job, and still be trading when a warranty claim comes in. The aim is not to drive the margin to zero. It is to confirm the margin is in the normal range and buys you something real.

If you would rather not reverse-engineer the maths, Check the Quote does it for you: paste or upload your quote and we check the labour, materials, and total against current UK market rates for your postcode, and flag where the margin sits above the fair range. Your first check is free. See also how to tell if a quote is too high.

Got a quote you want checked?

Paste any UK contractor quote and Check the Quote compares every line item against current market rates, flags missing scope, and runs a Companies House check on the contractor. Free on your first project.

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Frequently asked questions

What is a normal markup for a builder in the UK?: A general builder typically adds 15–25% for overheads and profit on top of the raw cost of labour and materials, plus a separate 10–20% markup on materials they buy and supply. These are normal, fair bands. They cover the real cost of running a building business and a reasonable profit. A markup meaningfully above these bands is not automatically unfair, but it should be explained by something concrete.
How much do builders mark up materials?: Usually 10–20%. This is fair, because the builder sources the materials, transports and stores them, carries the cost until you pay, handles returns of surplus, and stands behind them if something is faulty. A materials markup well above 20%, or a materials figure far above what the same items cost at a builders’ merchant, is the kind of line worth questioning.
What does “overheads and profit” actually cover?: Overheads are the costs of being in business whether or not any single job is profitable: van, fuel, public liability insurance, tools and plant, office and admin, accountancy, and tax. Profit is what is left for the builder after all of that. Together they typically run 15–25%. It is a legitimate and necessary part of the price, not a hidden charge bolted on.
Is a higher markup ever justified?: Yes. A higher margin can be justified by a premium specification, an insurance-backed guarantee, a longer warranty, employed (rather than cash-in-hand) labour, genuinely difficult access, or simply a busy, established builder who does not need the work. The test is not the size of the markup on its own, but whether you can point to something real that it buys.
How can I tell if a builder’s margin is too high?: Work it out from an itemised quote: the gap between the raw labour-and-materials cost and the total is roughly the overheads and profit. If that gap is far above 25% and the builder cannot point to a premium spec, better insurance, or a real warranty to justify it, the margin is doing the work of an inflated price. A lump-sum quote with no breakdown hides the margin entirely, which is its own reason for caution.

Last updated: 22 May 2026

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