UK Building Regulations: Construction Compliance Guide

Overview

The Building Regulations 2010 are a body of secondary legislation made under the Building Act 1984 that set minimum technical standards for most construction work carried out in England. Wales has its own version following devolution, and Scotland and Northern Ireland operate under separate systems.

The regulations are functional rather than prescriptive: they tell you the outcome your work must achieve, such as 'adequate resistance to the passage of sound', rather than dictating exactly how to build every detail. To bridge that gap, the government publishes Approved Documents, each labelled with a letter, which offer practical guidance on ways to meet the functional requirements.

Following an Approved Document is not compulsory, but doing so gives you a strong presumption of compliance. The rules are separate from planning permission. A project can have planning consent and still fall short of building regulations, or vice versa. Both usually need to be addressed in parallel.

Key steps

1. Work out whether your project needs building control. Most structural alterations, new builds, extensions, loft and garage conversions, new heating systems, rewiring, drainage changes, and replacement windows are covered. Some minor repairs and like-for-like replacements are exempt. If you are unsure, check with your local authority building control team before starting, because retrospectively regularising work tends to be more expensive and disruptive.
2. Choose between local authority and approved inspector building control. You can use your local council's building control service, or appoint a private approved inspector registered with the Building Safety Regulator. Either route can sign off compliance, and costs and service levels vary. For higher-risk buildings under the Building Safety Act 2022 regime, the Building Safety Regulator itself oversees control and the choice is more limited.
3. Submit the right application before work starts. For most projects this means either a full plans application, where drawings and specifications are assessed before construction, or a building notice for simpler domestic work. Submitting early gives the inspector time to flag issues before money has been spent on materials. Fees are payable and vary by scheme and authority, so check the current figures with your chosen control body.
4. Arrange inspections at each key stage. Building control will want to see the work at specified points, typically foundations, damp-proofing, drainage, structural elements, insulation, and completion. Missing an inspection can mean opening up finished work later to prove compliance. Keep a clear record of when each stage was signed off and retain copies of any certificates issued by competent persons such as electricians and gas engineers.
5. Get the completion or final certificate. Once the work passes its final inspection, the building control body issues a completion certificate (local authority) or final certificate (approved inspector). This document is what buyers, lenders, and conveyancers will ask for years down the line. Store it safely with the property's title papers, along with any supporting compliance certificates for electrics, heating, and glazing.