UK Property & Construction Calculators
Property costs in the UK are confusing enough without trying to work out if you need planning permission on top. Every builder we have spoken to has the same complaint -- nobody tells you the real cost upfront. You get a rough quote, then the Party Wall notice adds £1,500, building regs adds another £1,000, and suddenly your straightforward extension is £10k over budget before anyone has picked up a trowel.
In 2025, construction costs are still elevated -- materials have come down slightly from the post-Covid peak, but labour is as tight as ever, especially in the South East. New building regulations around energy efficiency (Part L) and fire safety keep raising the bar. And if you are dealing with a listed building, permitted development, or a tricky Party Wall situation, the rules are genuinely difficult to unpick without spending £300 an hour on a surveyor.
We built these tools because we got tired of the guesswork. Plug in your postcode and get a realistic build cost per square metre for your area. Check whether your extension actually needs planning permission or falls under permitted development. Generate a properly formatted Party Wall notice. Build a professional snagging list for your new build. Everything is based on current UK regs and real regional pricing -- whether you are in Bristol or Barnsley.
All Property & Construction Tools (33 live)
Construction Cost Benchmarker
Benchmark construction costs per square metre for UK residential and commercial projects by region.
Planning Permission Checker
Check whether your home improvement project needs planning permission under permitted development rules.
Scaffold Cost Estimator
Estimate scaffolding hire costs for your project based on dimensions, duration, and access requirements.
Listed Building Checker
Check if a property is listed and understand what restrictions apply to alterations and extensions.
New Build Completion Planner
Plan your new build timeline from foundations to handover with estimated costs and key milestones.
Building Regs Checklist Generator
Generate a building regulations compliance checklist tailored to your project type using AI.
Snagging List Generator
Create a professional snagging list for your new build with room-by-room checklists and photo placeholders.
UK Business Rates Estimator
Estimate your business rates liability based on rateable value, location, and available reliefs.
Trade Insurance Benchmarker
Compare trade insurance quotes and see benchmark premiums for your trade, turnover, and employee count.
Party Wall Letter Generator
Generate a legally formatted Party Wall Act notice letter with AI, ready to serve on your neighbour.
UK Stamp Duty Calculator
Calculate SDLT, LTT, and LBTT with first-time buyer relief and additional property surcharges.
Help to Buy Equity Loan Calculator
Calculate your Help to Buy equity loan value, annual fees, and repayment costs.
Mortgage Affordability Calculator
Calculate how much mortgage you can afford based on income, debts, and deposit.
Landlord Profit Calculator
Calculate rental profit, yields, and Section 24 tax impact for UK landlords.
EPC Rating Estimator
Estimate your property EPC rating and get improvement recommendations.
SDLT Refund Checker
Check if you overpaid stamp duty and may be eligible for an SDLT refund.
Conveyancing Fee Estimator
Estimate solicitor fees, searches, and disbursements for property transactions.
Build-to-Rent Yield Calculator
Development appraisal for BTR — gross/net yield, GDV, profit on cost.
Mortgage Overpayment Calculator
See how lump-sum or regular overpayments reduce your mortgage term and total interest paid.
Remortgage Comparison Calculator
Compare your current mortgage deal against remortgage offers including fees, ERCs, and monthly savings.
Bricklaying Calculator
Calculate bricks, blocks, and mortar needed for walls. Covers stretcher, Flemish, and English bond patterns.
Concrete Calculator
Calculate concrete volume, pre-mix bags, ready-mix loads, and raw material quantities for slabs, footings, columns, and steps.
Council Tax Calculator
Calculate your council tax bill by band and local authority with discounts.
Boiler Replacement Cost Estimator
Estimate new boiler replacement costs including installation and BUS grant eligibility.
House Extension Cost Estimator
Estimate house extension costs per m² — single, two-storey, side, and wrap-around.
Loft Conversion Cost Estimator
Estimate loft conversion costs — Velux, dormer, hip-to-gable, and mansard.
Lease Extension Premium Calculator
Calculate lease extension premium with marriage value for flats under 80 years.
Kitchen Renovation Cost Estimator
Estimate kitchen renovation costs by size, quality, layout, and materials.
Bathroom Renovation Cost Estimator
Estimate bathroom renovation costs including wet rooms, tiling, and underfloor heating.
Driveway Cost Estimator
Estimate driveway costs per m² — gravel, tarmac, block paving, resin, and stone.
Roofing Cost Estimator
Estimate re-roofing costs — tiles, slate, flat felt, EPDM, and fascias.
Paint Calculator
Calculate how much paint you need for walls and ceilings with door and window deductions.
Tile Calculator
Calculate how many tiles, adhesive, and grout you need with wastage allowance.
Frequently Asked Questions
How much does it cost to build a house in the UK in 2025?
The average cost to build a house in the UK in 2025 ranges from £1,500 to £3,000 per square metre, depending on location, specification, and build method. A typical three-bedroom detached house of 120 sqm would cost between £180,000 and £360,000 for the build alone, excluding land. London and the South East are significantly more expensive than the North. Timber frame and modular construction can reduce costs by 10-15% compared to traditional masonry.
Do I need planning permission for a house extension in the UK?
Many house extensions fall under Permitted Development rights and do not require planning permission. For a single-storey rear extension, you can extend up to 6 metres (detached) or 4 metres (semi/terraced) under prior approval. However, you will need planning permission if you live in a conservation area, if the extension covers more than half the garden, if it faces a highway, or if it exceeds height limits. Always check with your local planning authority before starting work.
What is a Party Wall Act notice and when do I need one?
The Party Wall etc. Act 1996 requires you to serve a notice on your neighbours before carrying out certain works. You need a Party Wall notice if you are building on or at the boundary, cutting into a party wall, or excavating within 3 or 6 metres of a neighbour’s structure depending on depth. The notice must be served at least two months before work begins for building on the boundary, or one month for other works. If your neighbour dissents, you will need to appoint a party wall surveyor.
How much does scaffolding cost in the UK?
Scaffolding hire in the UK typically costs between £500 and £2,500 for a standard domestic project. A basic scaffold for a two-storey semi-detached house costs around £800-£1,200 for the first week, with weekly hire charges of £50-£100 thereafter. Prices vary by region, height, access requirements, and whether you need special configurations like chimney scaffolds or roof access towers. Always get at least three quotes and ensure the contractor is NASC-accredited.
What building regulations apply to UK home improvements?
Building regulations in England and Wales (Part A through Part S) cover structural safety, fire safety, moisture resistance, ventilation, energy efficiency, electrical safety, and accessibility. Most structural work, electrical work in kitchens and bathrooms, plumbing changes, and energy upgrades require building regulations approval. You can apply through your local authority building control or use an approved inspector. Non-compliance can cause problems when selling your property.
What is a snagging list and why do I need one?
A snagging list is a record of defects and unfinished work in a new build property that need to be fixed by the developer. Common snagging issues include poorly fitted doors, cracked plaster, paint imperfections, gaps in sealant, uneven flooring, and drainage problems. You should compile your snagging list before or shortly after completion, ideally with the help of a professional snagging inspector who typically charges £300-£600. Under NHBC warranty, the developer must fix defects reported within two years.
How are business rates calculated for commercial property?
Business rates are calculated by multiplying the rateable value of your property by the applicable multiplier. For 2025/26, the standard multiplier is approximately 51.2p and the small business multiplier is approximately 49.9p. The rateable value is set by the Valuation Office Agency based on the estimated open market rental value. Small businesses with a rateable value below £12,000 may qualify for 100% relief. Transitional relief may limit annual increases.
Do I need listed building consent for work on a listed property?
Yes, you need listed building consent for any work that affects the character of a listed building, whether internal or external. This includes structural changes, installing new windows, altering original features, re-pointing brickwork, and even redecorating in some cases. Listed building consent is separate from planning permission -- you may need both. Work without consent is a criminal offence carrying unlimited fines. Grade I, II*, and II buildings all require consent, though the level of scrutiny varies.