How to use the planning permission cost estimator
- Choose What are you applying for? (a householder application, an outbuilding or fence, a lawful development certificate, prior approval for a larger home extension, or a new house) and Where is the property? (England or Wales).
- Switch Apply through the Planning Portal? on or off. Most people apply through it, and it adds a service charge.
- Pick Who draws the plans? An architect can be a fixed fee or a percentage of the build cost. If you pick a percentage, enter the build cost it applies to.
- Switch on Include the building regulations (building control) fee? and Include a party wall surveyor? if they apply to you. Add the number of adjoining owners for the surveyor.
- Choose Where do you live? and check the range. Tap Copy result to keep it, or Share link to send it to your builder.
Why use this calculator
It separates the fee set by law from the fees you can shop around for. The council fee is the same everywhere in each country. Drawings, architect and surveyor fees are not, so only those change with your region.
It shows where the sources disagree. The Planning Portal service charge is given as one figure in one place and as bands in another. We show the range and tell you, rather than pick one quietly.
It covers the costs people forget. Building regulations approval is separate from planning, and you may need drawings, a party wall surveyor or other reports.
It shows its working. Under How we worked it out you can see every line with your own numbers.
How we worked it out
Your numbers, step by step. This updates as you change the calculator.
- Council fee for a householder application in England: £548.
- Planning Portal service charge: about £91 to £149 including VAT (charged on fees over £100).
- Architect or designer, fixed fee: £1,500 to £6,000, × 1 for UK average = £1,500 to £6,000.
- Building control (extension up to 60 m², local authority fees): £595 to £1,320. Council fees vary, so no regional multiplier.
- Total: £2,734 to £8,017; typical about £5,247.
How we estimate the cost
We add up five parts, each with a low and a high figure:
Total = council fee + Planning Portal service charge + drawings or architect + building control + party wall surveyor
- Council fee. Set by law and the same in every council in a country. We use the figure for your application type.
- Planning Portal service charge. Added when you apply through the Portal and the council fee is over £100.
- Drawings or architect. Drawings only: £350 to £950 (typical £650, the midpoint). Architect or designer, fixed fee: £1,500 to £6,000 (typical £3,500). Architect as a percentage: 3% to 15% of the build cost you enter (typical 10%).
- Building control. £595 to £1,320 (typical £1,100) for an extension of up to 60 m², from the two council fee schedules we found.
- Party wall surveyor. £700 to £2,000 per adjoining owner (typical £1,000), times the number of owners.
An example: a householder application in England, applying through the Portal, with a fixed-fee architect and building control, costs about £2,734 to £8,017, typically about £5,247 (UK average, no party wall surveyor).
What’s included
| Application | England | Wales |
|---|---|---|
| Householder (one dwelling) | £548 | £585 |
| Outbuilding, fence, wall or gate | £272 | £283 |
| Lawful development certificate, planned work | £274 | about £293 |
| Lawful development certificate, existing work | £548 | £585 |
| Prior approval, larger home extension | £249 | not a Welsh scheme |
| New house, per house | £610 (fewer than 10) | £667 (up to 25) |
The lawful development certificate fees follow the rules: half the application fee for planned work, and the full fee for existing work. The Wales figure for planned work is our arithmetic (£585 ÷ 2).
The Planning Portal service charge is shown as a range, £91 to £149 including VAT, because the sources differ. A blog post gives £75.83 plus VAT per submission. The Portal’s “What it costs” page gives bands of £99 and £149 including VAT and doesn’t say which applications go in which band.
Not included: the build itself, a structural engineer, surveys or reports for a new house, and the Community Infrastructure Levy. A rise in the England householder fee to £575, and in prior approval to £310, from 8 December 2026 has been proposed in draft regulations but isn’t confirmed.
What changes the price
- Your application type and country. England and Wales set different fees. We don’t cover Scotland or Northern Ireland.
- Who draws the plans. This is usually the biggest part of the bill. A fixed-fee architect costs far more than a draughtsperson.
- Your region. The multiplier only changes fixed-fee architect, drawings and surveyor fees. A percentage-based architect fee follows your build cost instead. For example, London is about 25% higher than the UK average. Council fees and building control are not changed.
- Building control. Council schedules vary, and some cost guides quote less than the council schedules we found, so ask your council or a private approver.
- Your neighbours. Each adjoining owner who doesn’t agree in writing can mean another surveyor fee. It roughly doubles if each side has their own surveyor.
- Your project. These are the national rules and fees for houses in England and Wales. Flats, listed buildings and designated land have different rules, and your council has the final say.
Tips
- Check whether you need to apply at all. Many projects are permitted development. Our planning permission checker uses the national rules for houses in England. Your council has the final say.
- A lawful development certificate costs half the application fee for planned work. It is worth it if you want written proof before you build, or later when you sell.
- Prior approval for a larger home extension costs less than a full application (£249 against £548 in England). You don't pay it if you apply for planning permission (with a fee) for the same site on the same day.
- Get at least three quotes for drawings or an architect, and ask what the fee includes. Some cover planning drawings only, and some also cover building regulations drawings.
- If you share a wall with a neighbour, ask them to agree in writing first. If they do, you don't need to pay a party wall surveyor. See our party wall notice guide.
- Planning is only one part of an extension budget. Add the build cost with the house extension cost calculator.
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