How to Choose a Builder in the UK: The Complete Guide

Whether you're building an extension, converting a loft, or renovating your kitchen, choosing the right builder can make or break your project.

Get it right, and you'll have a smooth, stress-free build. Get it wrong, and you could face delays, cost overruns, and shoddy workmanship.

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Before You Start: Define Your Project

Before contacting any builder, be clear about:

• What you want done (detailed as possible)
• Your budget (including a 10-15% contingency)
• Your timeline (when you want to start and finish)
• Planning permission requirements (check with your local council)

The more prepared you are, the better quotes you'll get.

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How to Find Good Builders

1. Personal Recommendations

The best builders are busy because they're good. Ask neighbours who've had work done, check local community groups, or use TaapCraft's verified builder directory.

2. Check Their Portfolio

A good builder will have photos of previous work and be happy to provide references. On TaapCraft, you can see verified reviews and photos from completed projects.

3. Verify Credentials

Look for:

• Federation of Master Builders (FMB) membership
• NHBC registration (for new builds)
• Construction Skills Certification Scheme (CSCS) cards
• Public liability insurance (minimum £2 million)
• Employer's liability insurance (if they have staff)

4. Get Three Quotes Minimum

Always compare at least three detailed quotes. Beware of:

• Quotes that are significantly lower than others
• Vague line items
• No mention of materials specification

5. Check Their Financial Stability

Builders who go bust mid-project are more common than you'd think. Check Companies House for limited companies, and be wary of anyone asking for large upfront payments.

Red Flags to Watch For

🚩 No written contract - always get everything in writing

🚩 Demands full payment upfront - standard is staged payments

🚩 Can start immediately - good builders are usually booked weeks ahead

🚩 No insurance - this exposes you to massive liability

🚩 Won't provide references - what are they hiding?

🚩 Pressure to decide quickly - a sign of desperation

Typical Building Costs in the UK (2026)

| Project | Average Cost |

|---------|-------------| | Single-storey extension | £30,000 - £60,000 | | Two-storey extension | £50,000 - £90,000 | | Loft conversion | £25,000 - £55,000 | | Garage conversion | £10,000 - £20,000 | | Full kitchen renovation | £10,000 - £25,000 | | New build (per sqm) | £1,800 - £3,000 |

Prices vary significantly by region. London and South East typically 20-40% higher.

The Contract Checklist

Your building contract should include:

• ✅ Detailed scope of work
• ✅ Total cost with breakdown
• ✅ Payment schedule (staged payments)
• ✅ Start and completion dates
• ✅ Materials specification
• ✅ What happens if things change (variations)
• ✅ Defects/snagging period
• ✅ Dispute resolution process

Why TaapCraft for Finding Builders

• ✅ Verified builders with checked credentials
• ✅ Real project reviews with photos
• ✅ Price Estimator for your area
• ✅ Secure payment protection
• ✅ Direct messaging with builders

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TaapCraft - Your Local Talent, One Tap Away.

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Compare TaapCraft to other UK trade platforms

See exactly how TaapCraft stacks up on price, lead fees, commission, escrow and insurance:

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• TaapCraft comparison hub - every competitor, side by side