How to Quote a Building Job UK: A Builder's Pricing Guide (2026)

Why Building Quotes Go Wrong

Most building disputes are not caused by dishonesty. They are caused by avoidable errors at the quoting stage. Understanding the most common failure points is the first step to building a quoting process that holds up.

Building Labour Rates UK 2026

Labour is typically the largest single component of a building quote. These are the current market day rates for building trades across the UK in 2026. Rates reflect direct employment; self-employed subcontractor rates are broadly similar but may carry a small premium for short-duration engagements.

The London premium is typically 20–30% above provincial rates, reflecting higher costs of living, travel time, and the competitive labour market in the capital. If your work spans both London and non-London sites, price each job individually based on location rather than applying a blanket rate.

Builder Day Rates by Region (2026)

Day rates vary by up to 40% between London and the North. Factor in your local market when pricing jobs.

What to Include in a Building Quote

A complete building quote covers every cost category that the project will generate. Missing any of these at the quote stage means you absorb the cost later, or create a dispute trying to recover it.

• Labour— your team's time by phase, with day rates clearly stated
• Materials — itemised or by allowance, plus your markup
• Plant hire — scaffolding, mixers, access equipment, compactors
• Skip hire and waste disposal — priced per skip, number of skips estimated
• Subcontractor costs — electrician (first and second fix), plumber, plasterer, structural engineer
• Contingency — 10% on extensions, 15% on full refurbishments, shown as a visible line

Plant hire and skip hire are the items most commonly forgotten on smaller building quotes. A single-storey extension can easily generate two or three skips of waste, costing £700–£1,200 in disposal alone. Scaffolding for the same job runs £1,500–£3,000 for a four-week hire. These are not small amounts, and they come directly off your margin if you forget to include them.

Exclusions are equally important. State clearly what your quote does not cover: building regulations fees, structural engineer fees (if the customer is obtaining these separately), party wall surveyors, making good decoration after works, and any unforeseen work concealed within the existing structure.

Materials Markup: What to Charge and Why

A markup of 15–25% on materials is standard and entirely legitimate. Builders who do not mark up materials are effectively working for free on a significant part of their cost base. The markup covers real costs:

• Time spent specifying, ordering, and chasing deliveries
• Transport costs to collect materials or take delivery
• Storage risk — materials left on site can be damaged or stolen
• Returns and defects — you bear the cost of sorting problems with suppliers
• Account management time with builders merchants

For large projects, your account at a builders merchant will typically give you a trade discount of 10–20% off list price. Your sell price to the customer should be at or above the list price — your discount is part of your commercial return for account management and volume purchasing, not something you are obliged to pass on.

The main builders merchants for UK building materials are Travis Perkins, Buildbase, and Jewson, all of which offer trade accounts with monthly invoicing. Having an account also means you can order on account and pay after the stage payment arrives from the customer, which is important for cashflow on larger jobs.

For a detailed breakdown of how materials markup works across different scenarios, see the material markup guide for UK tradesmen.

Building Job Prices UK 2026: Reference Rates

These figures give a market reference for common building job types in 2026. They are all-in prices including labour, materials, and plant hire, but excluding VAT and structural or planning fees. Use them to sense-check your own figures, not as a substitute for a proper itemised quote.

London rates typically run 20–30% above these figures. Prices can also vary significantly based on the specification of finishes, the complexity of the structure, and ground conditions. The reference above assumes standard residential spec.

Worked Example: Quoting a Single-Storey Kitchen Extension (30m²)

This is a real-world example of how to build up a quote for a single-storey rear extension measuring 30m², with a flat roof and bi-fold doors, on a standard semi-detached house. Prices assume a non-London location.

This comes out at approximately £1,420/m², which sits within the typical £1,500–£2,000/m² range for a single-storey extension (the lower end reflects a non-London location and a straightforward flat roof spec). Customers in London should add 20–30% throughout.

How to Handle Variations

Variations are changes to the agreed scope of work. They are normal on building jobs — specifications change, customers change their minds, and hidden problems are discovered. The question is not whether variations will arise, but how you handle them when they do.

The cardinal rule is: never do additional work without written agreement from the customer first. Verbal agreements about variations are nearly impossible to enforce. The moment you identify that something is outside the original scope, stop, tell the customer, and issue a variation order. A variation order does not need to be a complex document — a brief email stating what the additional work is, why it is necessary, and what it will cost is entirely sufficient.

Define the scope of your original quote as tightly as possible to reduce ambiguity about what does and does not constitute a variation. The more specific your original quote, the easier it is to demonstrate that something new falls outside it.

If the customer refuses to pay for a genuine variation, you are not obliged to do the work. It is better to have an uncomfortable conversation about this at the start of a variation than to complete it unpaid and try to recover the money later. Builders who absorb variations silently tend to end up resentful and short-changed. Those who handle variations professionally, in writing and upfront, have fewer disputes overall.

Sending the Quote: Format, Timing, and Payment Terms

Send your quote as a PDF within 24 hours of the site visit. For jobs above £5,000, attach a one-page summary of your payment schedule. Builders who send a same-day quote consistently win a disproportionate share of jobs: customers interpret speed as competence and enthusiasm.

State a 30-day validity period clearly at the top of the document. This protects you from being asked to honour a six-month-old price and creates a natural prompt for the customer to commit within a reasonable timeframe.

For any job over £5,000, use a stage payment schedule. The standard structure for building work is:

• 20% deposit on acceptance of the quote, before materials are ordered
• 30% at frame stage — once groundworks and structure are watertight
• 30% at fit-out stage — once first fix, insulation, and boarding are complete
• 20% on completion — snagging signed off

This structure means you are never significantly out of pocket at any stage of the job. Never start a job without a deposit on a new customer. For existing customers with a good payment history, a smaller deposit or a different structure may be appropriate — but the principle of being paid at clear milestones rather than at the very end remains sound.

Frequently Asked Questions