How does ResiQuote generate cost estimates?

ResiQuote uses AI combined with real UK construction cost data to generate itemised estimates. We cross-reference your postcode, project type, dimensions, and specification against thousands of data points to provide accurate low, average, and high cost ranges.

Yes, generating an AI cost estimate is completely free. You can get a detailed, itemised breakdown of expected costs for your home extension project with no obligation. We also offer paid Design Packs and Support Packs for homeowners who want to take their project further.

How accurate are the AI estimates?

Our estimates include a Confidence Score that tells you how reliable the estimate is based on available data for your area and project type. Typically, our estimates are accurate within 10-20% of final build costs. The more detail you provide, the more accurate the estimate.

Do I need planning permission for my extension?

It depends on the type and size of extension. Many single storey extensions and loft conversions fall under Permitted Development rights and don't require planning permission. Our AI assistant can help you understand the rules for your specific project.

What areas of the UK do you cover?

ResiQuote covers all of England, Scotland, Wales, and Northern Ireland. Our cost data is localised by region, so estimates reflect the real price differences between areas like London, the South East, and other parts of the UK.

Can I save my quote and come back to it later?

Yes! Create a free account to save your quotes, track your project progress, and access your personalised dashboard. You can generate as many quotes as you need and compare different options.

How is ResiQuote different from other quote services?

Unlike traditional quote comparison sites, ResiQuote provides instant, transparent cost breakdowns powered by AI and real market data. We show you exactly what each element of your project should cost, so you can make informed decisions and spot overcharges.

What is the Confidence Score?

The Confidence Score (shown as a percentage) indicates how reliable our estimate is for your specific project. It's calculated based on the amount and recency of cost data available for your area and project type, the level of detail you've provided, and current market conditions.

Built on real UK construction expertise

Honest quotes for your home improvement

Get transparent, data-backed cost estimates for UK home extensions and repairs. Our estimates draw on insights from builders, developers, and engineers - combined with real market data - so you know exactly what a fair price looks like.

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Transparent Pricing

No hidden costs or surprises

Real Market Data

Localised UK cost data

Instant Results

Results in seconds

Modern UK kitchen-diner rear extension with bifold doors opening onto a landscaped garden - the kind of project ResiQuote helps you price transparently

No obligation

Get your quote completely free with no strings attached.

Real UK data

Cost estimates based on actual UK construction and material prices.

Full transparency

Every line item broken down so you can see exactly where costs come from.

Instant results

Informed by UK construction professionals and delivered in under 60 seconds.

AI-powered home extension cost estimate plans showing detailed project breakdown

Itemised cost breakdown

Low, average, and high ranges - for every line item

How ResiQuote works

Get an accurate cost estimate in under 2 minutes

Enter Your Postcode

Tell us where you live so we can provide localised cost data for your area.

Describe Your Project

Choose your project type (extension or repair), enter relevant details, and select your finish level or urgency.

AI Generates Your Quote

Our AI analyses your inputs against real UK market data to produce an itemised estimate.

Review & Compare

See a transparent breakdown of costs with low, average, and high ranges.

What are you planning?

Get instant cost estimates for the most popular UK home improvement projects

Home Extensions

Single storey rear extension on a UK semi-detached home with large glazed doors

Single Storey Extension

A single storey rear or side extension is one of the most popular home improvements in the UK, adding valuable living space without the complexity of multi-level construction.

£28,000 – £44,000 typical cost

Double storey side and rear extension adding significant living space to a UK family home

Double Storey Extension

A double storey extension adds significant space on two levels, making it cost-effective per square metre compared to two separate single storey extensions.

£48,000 – £76,000 typical cost

Loft Conversion

A loft conversion transforms unused attic space into a habitable room, offering one of the best returns on investment of any home improvement project.

£27,500 – £43,750 typical cost

Kitchen Extension

A kitchen extension creates a modern, open-plan living and dining space, typically extending the rear of the property to accommodate a larger kitchen area.

£27,900 – £45,000 typical cost

Garage Conversion

A garage conversion transforms an existing garage into a habitable room, offering one of the most affordable ways to add living space without building an extension.

£9,750 – £18,750 typical cost

Home Repairs

Roofer replacing slate tiles on a UK terraced house

Roofing

£300 – £3,500 typical

Plumber repairing copper pipes under a kitchen sink

Plumbing

£150 – £1,500 typical

Electrician inspecting a UK consumer unit fuse box

Electrical

£150 – £2,500 typical

Damp

£300 – £4,000 typical

Structural

£800 – £10,000 typical

Glazier fitting a new uPVC window on a UK terraced house

Windows & Doors

£100 – £1,500 typical

Floor fitter laying engineered oak hardwood in a UK living room

Flooring

£150 – £2,000 typical

Painting

£200 – £2,500 typical

Tradesperson clearing and repairing gutters on a UK semi-detached house

Guttering

£80 – £1,200 typical

Handyman fixing a door hinge in a bright UK home interior

Maintenance

£100 – £1,500 typical

500+

Location pages

Project types covered

85%

Average confidence score

Free

AI cost estimates

Trusted by UK homeowners

See what others are saying about ResiQuote

“ResiQuote gave us a clear idea of what our loft conversion would cost before we spoke to a single builder. It saved us weeks of guesswork.”

Sarah M.

Bristol · Loft Conversion

“The itemised breakdown was incredibly helpful. When our builder's quote came in, we could compare line by line and negotiate with confidence.”

James T.

Manchester · Rear Extension

“I was quoted 40% over the ResiQuote estimate by one builder. Thanks to the benchmark, I knew to keep looking and saved thousands.”

Priya K.

London · Kitchen Extension

Frequently asked questions

Everything you need to know about ResiQuote

UK homeowners reviewing home extension quotes

Ready to find out what your project should cost?

Get a free cost estimate in under 2 minutes - for extensions or repairs - built on real builder, developer, and engineer insights. No obligation, no hidden fees, just honest pricing.

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Built on real UK construction expertise