How to Write a Quote for Building Work

Writing a proper quote for building work is one of the most important skills a builder can develop. Get it right, and you win profitable work from customers who trust you before you have even started. Get it wrong, and you either lose the job to someone who presented better, or win it at a price that leaves you out of pocket.

The problem is that most builders were never taught how to quote. You learned your trade on site, not in a classroom. So quoting becomes a rushed job - a quick text message, a scribbled number on the back of a business card, or a verbal figure thrown out at the end of a site visit. None of these approaches serve you well.

This guide walks you through exactly how to write a professional building quote, step by step. It covers what to include, how to format it, how to break down your pricing, and common mistakes that cost builders work. If you want to see what a professional building proposal looks like before you start, have a look at our demo proposal.

Step 1: Survey the Job Properly

A good quote starts long before you sit down to write it. It starts on site. Every building quote should be based on a thorough survey of the property and a proper conversation with the customer about what they want.

During the site visit, take photos of the existing space, measure up, check for anything that could cause complications (damp, structural issues, access problems, asbestos in older properties), and ask the customer detailed questions about their expectations. Do they have drawings or plans? Do they need planning permission? Have they had other quotes?

The more information you gather now, the more accurate your quote will be. Inaccurate quotes lead to disputes, additional costs the customer was not expecting, and damaged relationships.

Step 2: Calculate Your Costs Accurately

Before you can write a quote, you need to know what the job will actually cost you. Break your costs into three categories.

Labour

Work out how many days the job will take and what labour you need. If you are a one-man band, this is straightforward. If you use subcontractors or labourers, factor in their day rates. Be realistic about timescales. Builders who underestimate how long a job will take end up working for less than minimum wage on the final days. Use our job pricing guide to benchmark your day rates against the market.

Materials

Price up every material you will need for the job. Get actual quotes from your merchants rather than guessing. Include delivery costs. Add a waste factor of ten to fifteen per cent for bricks, blocks, timber, and plasterboard. Add your markup - typically fifteen to twenty-five per cent on materials, which covers your time sourcing, collecting, and taking responsibility for them. Our material cost estimator can help you total these up quickly.

Overheads and Profit

Your quote needs to cover more than just the direct costs of this job. It needs to contribute to your van costs, insurance, tools, accountancy fees, and all the other costs of running a building business. And it needs to include a profit margin. Many builders forget this and end up just covering costs. A healthy net profit margin for building work is ten to twenty per cent after all costs.

Step 3: Structure Your Quote Clearly

A professional building quote should contain the following sections, in order.

Your business details. Trading name, address, phone number, email. Include your company registration number if applicable, your public liability insurance details, and any trade accreditations such as Federation of Master Builders membership or NHBC registration.

Customer details. The customer's name, the property address where the work will be carried out, and their contact details.

Date and reference number. Every quote should have a unique reference number and the date it was issued. This makes it easy to track and reference later.

Scope of work. This is the most important part of your quote. Describe exactly what you will do, in plain English that the customer can understand. Do not use trade jargon. Break the work into phases or sections if it is a larger project. For example, for an extension you might break it into foundations, brickwork, roof, windows and doors, first fix, second fix, and finishing.

Pricing breakdown. Show the customer where their money is going. At a minimum, separate labour from materials. Ideally, break the costs down by phase or section so the customer can see the cost of each element. This builds trust and makes your quote easier to compare with others.

Total price and VAT. State your total clearly. If you are VAT registered, show the net amount, the VAT amount, and the gross total. If you are not VAT registered, state this clearly so the customer does not assume your prices exclude VAT.

Timeline. Give a realistic start date and estimated duration. For a single-storey extension, this might be ten to fourteen weeks. For a loft conversion, eight to twelve weeks. Always include a note that timescales are estimates and may be affected by weather, supply delays, or unforeseen complications.

Payment terms. State your deposit requirement, your staged payment schedule, and your payment methods. For projects over five thousand pounds, staged payments are standard - see our guide on how to price a job for typical payment structures.

Exclusions. List everything that is not included. This is crucial for building work. Common exclusions include planning and building regulations fees, architectural drawings, Party Wall Act surveyor fees, decoration, landscaping, and furniture or kitchen fitting. If it is not in your quote, list it as an exclusion so there are no surprises.

Terms and conditions. Include your guarantee on workmanship (typically two to five years for building work), your procedure for variations and additional work, and your cancellation policy. See our guide on how to write terms and conditions for more detail.

Validity period. State that the quote is valid for thirty days. This protects you against material price increases.

Step 4: Present It Professionally

How you present your quote matters just as much as what is in it. A typed, well-formatted PDF sent by email the same day as your site visit creates a completely different impression from a handwritten note sent a week later.

Think about it from the customer's perspective. They are about to spend ten, twenty, or fifty thousand pounds on building work. They want to feel confident that the person doing the work is organised, professional, and reliable. Your quote is the first evidence they have of how you run your business.

The builders who consistently win the best work are the ones who treat their quotes as professional documents. They use their branding, they format them neatly, and they deliver them promptly. If you want to see what this looks like in practice, see what a professional building proposal looks like.

Step 5: Avoid These Common Mistakes

Quoting too quickly without a proper survey. Rushing out a number based on a phone conversation or a few photos leads to inaccurate pricing. Always visit the property before committing to a price for any job over a few hundred pounds.

Not itemising your costs. A single lump sum with no breakdown looks unprofessional and makes customers suspicious. It also makes it harder to justify your price if the customer queries it.

Forgetting exclusions. If your extension quote does not mention decoration, the customer will assume it is included. Then you have a dispute on your hands. Be explicit about what is and is not included.

Not following up. Sending a quote and then waiting passively for the customer to respond is one of the biggest mistakes builders make. Follow up within forty-eight hours to check they received it and ask if they have any questions. Read our guide on how to follow up on a quote for tips on doing this well.

Underpricing to win work. Winning a job at a price that barely covers your costs is worse than not winning it at all. You will resent the work, cut corners to save time, and damage your reputation. Price fairly and let the quality of your work and your professionalism justify the cost.

Frequently Asked Questions

What should a building quote include?

A professional building quote should include your business details and accreditations, the customer's name and property address, a detailed scope of work, an itemised breakdown of labour and materials costs, the total price with clear VAT status, estimated start date and project duration, payment terms including deposit and staged payment schedule, a list of exclusions, your workmanship guarantee, and a validity period of typically thirty days.

How long should a building quote be valid for?

Most builders set a validity period of thirty days. This is reasonable because material prices, particularly timber, steel, and concrete, can fluctuate. For larger projects requiring planning permission or involving longer decision timelines, some builders extend validity to sixty days but include a clause allowing for material price adjustments. Never leave a quote open-ended.

Should I give a fixed price or an estimate for building work?

For clearly defined work where you can accurately predict time and materials, a fixed price is better. It gives customers certainty and makes it easier to win the job. For work where the scope is uncertain, such as structural repairs with potential hidden damage, an estimate with a clearly stated range is more appropriate. Always label your document clearly as either a quotation or an estimate to avoid disputes.

How much deposit should a builder ask for?

For most building work, a deposit of ten to twenty-five per cent is standard and reasonable. The deposit covers initial material purchases and demonstrates customer commitment. For larger projects over ten thousand pounds, staged payments work better than a single large deposit. A typical structure is ten to fifteen per cent on acceptance, then monthly or milestone-based payments throughout, with five to ten per cent retention until completion and snagging.