See local extension builders rates for 2024

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Extension builder cost per hour

Extension builder cost per hour

Builders that specialise in extensions work with loft conversions, extensions and basement conversions, so generally charge more per hour than other general builders. Hourly rates depend on where you live and often the type of renovation or conversion work you’re looking for. The average cost per hour for a renovation specialist is £29, but it can range from £16 - £39.

See our extension builder rates table for more hourly rates broken down by location. Or, post your job on HaMuch and get a more accurate quote for free.

Builder cost per day

Most builders will give you a day rate, since a house extension, garage conversion or loft conversion will take at least a few weeks! The average day rate for a builder doing large works is £208, but again, depending on where you live and the type of project it could range between £134 - £249. 

It’s also worth remembering that small, family-owned businesses will generally charge less than larger construction companies as they will have fewer overheads.

Check our rates table for builder day rates in your area.

How to get the cheapest quotes when looking for a builder that does extensions

When seeking the cheapest quotes from builders that specialise in extensions, it's important to keep in mind that the lowest price doesn’t always guarantee the best quality or value. However, if cost is a significant factor for you, here are some tips to help you get competitive quotes:

Research and compare: Take the time to research and identify multiple renovation specialists in your area. Look for builders who have experience in the type of project you're undertaking. It’s also worth asking for recommendations from friends, family, or trusted sources. Request quotes from several builders and carefully compare them to understand the scope of work, materials included, and any additional services offered. You can also use HaMuch to get a free, no obligation quote – simply post your job to get in touch with local renovation specialists.

Provide detailed information: When requesting quotes, provide clear and detailed information about your project. Include relevant plans and any specific requirements or preferences you have. The more precise and comprehensive your information, the more accurate and competitive the quotes are likely to be – and it will reduce any surprise added costs further down the line.

Request itemised quotes: Ask builders to provide itemised quotes that break down the costs for different aspects of the project, such as labour, materials, permits, and any additional services. This transparency allows you to assess each quote's components and identify any potential areas for negotiation or cost savings.

Ask how you can reduce the cost: During the quote process, ask the builders for suggestions on how to reduce costs without compromising quality. Experienced builders may provide alternative construction methods, materials, or design tweaks that can help you achieve your goals within a tighter budget.

Negotiate: Once you have received quotes, don't be afraid to negotiate with builders. Seek clarification on any ambiguous or unclear elements and discuss potential cost reductions or value-added services. However, be cautious about excessively low quotes, as that might show that the builder hasn’t got the relevant skills they need or will hike up the price later on.

Check references and reviews: Before making a final decision based on cost alone, thoroughly research each builder's reputation. Request references from their previous clients and inquire about their experience, reliability and workmanship. Read online reviews and check their certifications to ensure they meet the necessary standards.

Choosing a builder that does large works

Choosing the right builder for your renovation project is crucial to ensure you get the best finish yo can. Here are some essential steps to guide you in the selection process:

Check credentials and experience: Verify the credentials and qualifications of potential builders. Ensure they hold the necessary certifications, trade body memberships and insurance coverage. Additionally, assess their experience by reviewing their portfolio of completed projects, as well as any testimonials or references from previous clients.

Conduct interviews: Narrow down your list of potential builders and arrange informal interviews with them. Use this opportunity to discuss your project, ask questions about their experience and approach, and gauge their communication skills and professionalism. Pay attention to their responsiveness, willingness to answer your questions, and their ability to understand and accommodate your requirements.

Trust your instincts: Consider your overall impression and gut feeling about the specialist. Building a positive working relationship is important, as the renovation project may span several weeks or months. Choose a builder you feel comfortable with, who communicates effectively and understands your vision.

Remember, selecting the right specialist builder is not solely about cost but also about their experience, reputation, and ability to deliver quality work. Take the time to conduct thorough research to choose a builder who best aligns with your renovation goals and values.

Extension and conversion ideas and costs

Loft conversion cost

A loft conversion is a fantastic way to add extra space to your home – whether it’s for an extra bedroom, office or playroom. Loft conversion costs typically range between £30,000 to £50,000, but can be higher for more extensive or luxurious conversions. Other factors that impact the cost include:

  • The size of the loft
  • The complexity of the project, including structural modifications, plumbing, electrical work, and insulation
  • Whether you want additional features such as en-suite bathroom
  • Where you live

The best thing to do is to get detailed quotes from builders who specialise in loft conversions that are specific to your project to get a more accurate understanding of the costs involved.

Garage conversion cost

A garage conversion is a great way to make use of the space rather than filling it with unwanted belongings – most people don’t even use them for their cars any more! You could convert your garage into a home gym, office space or even a granny annexe for your elderly parents. A garage conversion typically costs between £10,000 to £30,000, but can be higher for larger or more complex conversions. Other considerations to take into account include:

  • The size of the garage, as a bigger one will increase the amount of materials used and labour time
  • The purpose of the conversion will impact the cost – converting the garage into a living space with plumbing and electrical work will generally be more expensive than converting it into a simple home office or gym.
  • Your location

Rates for other trades

Extension Builder hourly rate and daily rate
Extension Builder: Average Hourly and Daily Rates in the UK for 2024 (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Extension Builder near Aberdeen£26£249
Extension Builder near Amber Valley£28£211
Extension Builder near Angus£28£216
Extension Builder near Arun£31£218
Extension Builder near Ashfield£28£214
Extension Builder near Aylesbury Vale£34£230
Extension Builder near Barnsley£28£226
Extension Builder near Basildon£35£223
Extension Builder near Basingstoke & Deane£35£230
Extension Builder near Bassetlaw£27£216
Extension Builder near Bath & North East Somerset£29£223
Extension Builder near Bedford£37£240
Extension Builder near Belfast£20£134
Extension Builder near Birmingham£25£199
Extension Builder near Blackburn£31£196
Extension Builder near Blackpool£26£184
Extension Builder near Bolton£27£197
Extension Builder near Bournemouth£34£225
Extension Builder near Bracknell Forest£36£237
Extension Builder near Bradford£26£201
Extension Builder near Braintree£32£218
Extension Builder near Breckland£23£187
Extension Builder near Bridgend£28£188
Extension Builder near Brighton£30£219
Extension Builder near Bristol£29£221
Extension Builder near Broadland£22£176
Extension Builder near Broxtowe£28£211
Extension Builder near Bury£28£199
Extension Builder near Caerphilly£30£187
Extension Builder near Calderdale£25£194
Extension Builder near Cambridge£33£234
Extension Builder near Canterbury£27£198
Extension Builder near Cardiff£31£189
Extension Builder near Carmarthenshire£23£188
Extension Builder near Charnwood£26£193
Extension Builder near Chelmsford£34£224
Extension Builder near Cheltenham£28£220
Extension Builder near Cherwell£31£226
Extension Builder near Chester£28£198
Extension Builder near Colchester£29£203
Extension Builder near Conway£23£179
Extension Builder near Coventry£24£191
Extension Builder near Crewe & Nantwich£26£198
Extension Builder near Dacorum£39£236
Extension Builder near Derby£28£209
Extension Builder near Doncaster£26£213
Extension Builder near Dover£26£194
Extension Builder near Dudley£25£197
Extension Builder near Dumfries & Galloway£20£158
Extension Builder near Dundee£30£222
Extension Builder near East Ayrshire£23£179
Extension Builder near East Devon£23£186
Extension Builder near East Dunbartonshire£29£211
Extension Builder near East Hampshire£33£224
Extension Builder near East Hertfordshire£38£240
Extension Builder near East Lindsey£25£184
Extension Builder near East Riding£26£198
Extension Builder near Eastleigh£30£213
Extension Builder near Edinburgh£33£235
Extension Builder near Elmbridge£39£237
Extension Builder near Epping Forest£38£235
Extension Builder near Erewash£28£209
Extension Builder near Exeter£22£186
Extension Builder near Falkirk£29£203
Extension Builder near Fife£34£238
Extension Builder near Flintshire£28£195
Extension Builder near Gateshead£30£208
Extension Builder near Gedling£28£211
Extension Builder near Glasgow£30£224
Extension Builder near Gloucester£27£210
Extension Builder near Guildford£38£241
Extension Builder near Gwynedd£19£153
Extension Builder near Halton£27£193
Extension Builder near Harrogate£26£195
Extension Builder near Havant & Waterloo£31£215
Extension Builder near Highland£19£190
Extension Builder near Horsham£33£227
Extension Builder near Huntingdonshire£38£240
Extension Builder near Ipswich£27£195
Extension Builder near Isle of Wight£30£214
Extension Builder near Kings Lynn & West Norfolk£26£204
Extension Builder near Kingston-upon-Hull£25£194
Extension Builder near Kirklees£26£200
Extension Builder near Knowsley£27£192
Extension Builder near Lancaster£23£190
Extension Builder near Leeds£26£199
Extension Builder near Leicester£25£187
Extension Builder near Lisburn£20£136
Extension Builder near Liverpool£28£192
Extension Builder near London£38£236
Extension Builder near Luton£36£232
Extension Builder near Macclesfield£29£202
Extension Builder near Maidstone£34£230
Extension Builder near Manchester£28£198
Extension Builder near Mid Bedfordshire£37£239
Extension Builder near Mid Sussex£31£222
Extension Builder near Middlesbrough£39£208
Extension Builder near Milton Keynes£35£232
Extension Builder near Neath Port Talbot£26£193
Extension Builder near New Forest£32£223
Extension Builder near Newbury£32£227
Extension Builder near Newcastle-under-Lyme£25£197
Extension Builder near Newcastle-upon-Tyne£30£208
Extension Builder near Newport£31£193
Extension Builder near North Ayrshire£26£203
Extension Builder near North East Lincolnshire£26£202
Extension Builder near North Hertfordshire£37£238
Extension Builder near North Lanarkshire£28£208
Extension Builder near North Lincolnshire£24£187
Extension Builder near North Somerset£29£221
Extension Builder near North Tyneside£30£212
Extension Builder near North Wiltshire£28£212
Extension Builder near Northampton£35£223
Extension Builder near Norwich£22£178
Extension Builder near Nottingham£28£211
Extension Builder near Nuneaton & Bedworth£25£195
Extension Builder near Oldham£28£199
Extension Builder near Oxford£31£230
Extension Builder near Pembrokeshire£16£137
Extension Builder near Perth & Kinross£32£237
Extension Builder near Peterborough£36£232
Extension Builder near Plymouth£29£207
Extension Builder near Poole£34£225
Extension Builder near Portsmouth£30£214
Extension Builder near Powys£20£173
Extension Builder near Preston£32£193
Extension Builder near Reading£35£235
Extension Builder near Redcar & Cleveland£35£211
Extension Builder near Reigate & Banstead£38£237
Extension Builder near Renfrewshire£31£233
Extension Builder near Rhondda, Cynon, Taff£29£189
Extension Builder near Rochdale£28£198
Extension Builder near Rotherham£29£231
Extension Builder near Salford£28£198
Extension Builder near Salisbury£37£245
Extension Builder near Sandwell£25£196
Extension Builder near Scarborough£24£195
Extension Builder near Scottish Borders£31£245
Extension Builder near Sefton£27£191
Extension Builder near Sevenoaks£38£233
Extension Builder near Sheffield£29£235
Extension Builder near Slough£39£238
Extension Builder near Solihull£24£193
Extension Builder near South Ayrshire£25£193
Extension Builder near South Bedfordshire£37£240
Extension Builder near South Cambridgeshire£34£238
Extension Builder near South Gloucestershire£29£221
Extension Builder near South Kesteven£27£193
Extension Builder near South Lanarkshire£27£203
Extension Builder near South Oxfordshire£33£232
Extension Builder near South Somerset£29£224
Extension Builder near South Tyneside£30£210
Extension Builder near Southampton£30£214
Extension Builder near Southend-on-Sea£33£217
Extension Builder near St Albans£37£237
Extension Builder near St Helens£27£192
Extension Builder near Stafford£26£203
Extension Builder near Stockport£28£200
Extension Builder near Stockton-on-Tees£39£211
Extension Builder near Stoke-on-Trent£25£196
Extension Builder near Stratford-on-Avon£25£196
Extension Builder near Stroud£27£210
Extension Builder near Suffolk Coastal£25£193
Extension Builder near Sunderland£30£208
Extension Builder near Swale£32£214
Extension Builder near Swansea£25£200
Extension Builder near Tameside£28£199
Extension Builder near Teignbridge£24£196
Extension Builder near Tendring£27£198
Extension Builder near Test Valley£30£212
Extension Builder near Thamesdown£27£208
Extension Builder near Thanet£24£183
Extension Builder near The Wrekin£26£207
Extension Builder near Thurrock£36£229
Extension Builder near Torbay£24£202
Extension Builder near Trafford£28£198
Extension Builder near Vale of Glamorgan£30£193
Extension Builder near Vale of White Horse£30£222
Extension Builder near Vale Royal£28£198
Extension Builder near Wakefield£26£201
Extension Builder near Walsall£25£199
Extension Builder near Warrington£27£196
Extension Builder near Warwick£24£192
Extension Builder near Waveney£22£184
Extension Builder near Waverley£38£240
Extension Builder near Wealden£29£218
Extension Builder near West Lancashire£27£191
Extension Builder near West Lothian£31£223
Extension Builder near West Wiltshire£28£212
Extension Builder near Wigan£27£196
Extension Builder near Windsor & Maidenhead£39£238
Extension Builder near Wirral£28£192
Extension Builder near Wokingham£36£236
Extension Builder near Wolverhampton£25£198
Extension Builder near Wrexham Maelor£27£201
Extension Builder near Wychavon£25£200
Extension Builder near Wycombe£35£237
Extension Builder near York£25£191