Extensions & additions
Single- or two-storey extensions, side returns, porches and other additions, including structural work and coordination with the wider project team where required.
Builder London
Find a builder in London
Planning an extension, renovation, structural alteration, conversion or general building project? Post the project once and suitable builders covering your London postcode can get in touch. Compare experience, scope, programme and price before deciding who feels right for the work.
- Post your building project once
- Compare up to 3 quotes
- No obligation to hire
Identity-verified partner profiles
Compare up to 3 local quotes
You choose who to hire
Looking for a builder near you in London?
Use the postcode where the work will happen and describe the property, project size and stage you are at. London projects can be heavily affected by access, parking, neighbours, scaffolding, deliveries and waste removal, so those practical details help builders judge the job before they price it.
Building projects large and small
What can a London builder help with?
A general builder may take on anything from masonry repairs to a multi-trade renovation. Larger projects are easier to compare when each builder receives the same drawings, specification, structural information and clear statement of who is responsible for approvals and specialist trades.
Renovations & refurbishments
Whole-room, flat or house improvement projects involving strip-out, repair, reconfiguration, making good and coordination between several trades.
Structural alterations
New openings, wall alterations and structural supports where the work follows appropriate design, calculations and the required approval route.
Brickwork & masonry
New walls, repairs, repointing, steps, blockwork and other masonry where a general builder or brickwork specialist is appropriate for the scope.
Conversions & reconfiguration
Garage, loft-adjacent or internal reconfiguration projects that change how existing space is used, subject to the design, permissions and Building Regulations that apply.
General building repairs
Local masonry, structural and fabric repairs, making good after other trades and building work that goes beyond a typical handyman visit.
How much does a builder cost in London?
Building projects vary too much for one London price to be meaningful. A day of repair work and a multi-month extension need completely different budgets. Current 2026 labour guidance still gives a useful sense-check before you compare full project quotes:
~£400/daycurrent UK builder day-rate benchmark
Project-pricedtypical approach for larger London building work
Indicative guidance checked August 2026. Checkatrade’s 2026 builder guide puts a typical builder at around £400 per day and notes that rates are often higher in London and the South East. Larger London projects are normally priced from drawings, scope, labour, materials, access, scaffolding, waste, specialist trades and programme rather than by multiplying a day rate.
Comparable quotes start with a comparable brief
Give every builder the same project information
A low headline figure is hard to judge if one builder has included scaffolding, skips, structural steel, specialist trades and making good while another has not. Standardise the brief before comparing totals.
- Share drawings, dimensions, structural information and specifications you already have.
- State which approvals have been obtained or are still being investigated, and who is expected to manage inspections or paperwork.
- Explain access for deliveries, skips, scaffolding and materials, including shared passages or parking restrictions.
- Ask each builder to state exclusions, VAT where applicable, payment stages, proposed start date, programme and how variations will be agreed.
Across London
Search for builders by London postcode
The postcode helps builders understand both travel and the practical context of the project. A rear extension in Wandsworth, renovation in Ealing or structural alteration in Hackney can involve very different access and site logistics even when the building work itself is similar.
WandsworthEalingBarnetCroydonGreenwichLewishamHaringeyHackney
London access can affect the programme as much as the build
Tight streets, controlled parking, shared entrances, neighbouring properties and limited storage can all shape how materials arrive and waste leaves site. Explain these constraints before final quotes so they are priced rather than discovered after work starts.
Check planning and Building Regulations separately. Planning permission and Building Regulations are different systems. For London projects, check the requirements with the relevant borough planning authority and building-control route before assuming an extension or alteration is ready to build.
How it works
Post the London building project once. Then compare suitable builders.
Describe the project once, share the information you already have and let builders who cover the postcode decide whether the scope fits their team and programme.
Post the building project
Enter the London postcode, describe the work, project stage, drawings or approvals you have and your preferred timing.
Hear from suitable local builders
Your requirements can be matched through our partner network, and up to 3 local tradespeople can contact you about the project.
Compare and choose
Compare relevant project experience, scope, exclusions, programme, communication and price before deciding who to hire.
Choose with confidence
What should you check before hiring a builder?
For substantial work, compare more than the total price. Look at relevant experience, the clarity of the written scope, how the project will be managed and what happens when the design or site conditions change.
Comparable project experience
Ask for recent examples and references from work similar in scale and complexity. Extensions, structural alterations and full renovations demand different planning from small general repairs.
Contract, insurance & payment stages
For larger work, agree the scope, insurance, programme, variation process and staged payments in writing. Avoid vague arrangements that make it difficult to tell what is included or when money is due.
Approvals and responsibilities
Clarify who is responsible for drawings, structural design, planning matters, Building Regulations, inspections and completion paperwork before work begins.
Builder plus specialist trades
Make sure the right specialists are included in the project
A builder may coordinate an extension or renovation, but electrical, plumbing, roofing and finishing work still needs the right trade and, where relevant, the right qualifications. Ask who will carry out each part and who remains responsible for coordination and handover.
Useful answers
Builder London FAQs
Quick answers before posting a building project in London.
How do I find a builder near me in London?
Enter the project postcode and describe the work, scale and current stage clearly. Your request can then be matched with suitable builders who cover that part of London, allowing you to compare up to 3 responses before deciding who to hire.
How much does a builder cost in London?
There is no single useful London project price. Checkatrade’s current 2026 guide puts a typical UK builder at around £400 per day and notes London and South East rates are often higher. Extensions and renovations are normally priced as projects because materials, structural work, access and specialist trades dominate the total.
Do I need planning permission for an extension in London?
Not every extension needs a full planning application because some work can fall within permitted development rights, but the answer depends on the property and proposal. Check with the relevant London borough planning authority before assuming permission is not required.
Is Building Regulations approval the same as planning permission?
No. They are separate systems. Many structural alterations and extensions need Building Regulations approval even where planning permission is not required. Clarify the approval route and inspection responsibilities before work starts.
Should I get drawings before asking builders for quotes?
For larger or structural projects, drawings and specifications usually make quotes easier to compare because every builder is pricing the same information. Structural calculations or a schedule of works may also be needed depending on the project.
What should a builder quote include?
For substantial work, ask for a written breakdown covering scope, labour, materials, exclusions, waste, access equipment, specialist trades, VAT where applicable, start timing, programme, payment stages and how variations will be approved.
Are the builders verified?
Tradespeople using our partner service are verified with official identification, email and phone details. Public liability insurance and qualifications are checked where provided. You should still review profiles, feedback, comparable project experience, insurance and the full quote before deciding who to hire.
Do I have to accept a builder quote?
No. Posting the project does not oblige you to hire anyone. Compare the scope, experience, programme, contract terms and price and choose only if you are comfortable with the builder and proposed approach.
Need a builder in London?
Post the building project once, let suitable local builders come to you and compare your options before deciding who to hire.