Building Control Fees Explained: What You Pay and Why (2026)
Building control is the process of checking that your construction work meets Building Regulations. You pay a fee for plan checking and site inspections. This guide explains the costs and options.
Cost breakdown
Who provides building control?
You have two options: your local authority building control (LABC) or an approved inspector (a private company). Both check the same regulations. Approved inspectors are often faster and more flexible; LABC is the default. You can choose either.
Fee structure
Fees are typically split into: plan check fee (paid upfront when you submit plans) and inspection fee (paid when work starts). Some providers charge a single combined fee. Fees vary by project type and local authority.
| Project | LABC Fee | Approved Inspector |
|---|---|---|
| Single storey extension | £400–£600 | £400–£700 |
| Two storey extension | £500–£800 | £500–£900 |
| Loft conversion | £400–£700 | £400–£800 |
| Garage conversion | £300–£500 | £300–£500 |
| Wall removal (structural) | £250–£400 | £250–£400 |
Prices based on Dorset rates, 2026
Frequently asked questions
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