Finance Editor, Kael Tripton Ltd - LBS MBA - Verified against FCA Handbook: 14 June 2026
Quick answer
Building Regulations approval is required for most structural work, heating installations, electrical work in kitchens and bathrooms, and window replacements. Apply via full plans (plans submitted and approved before work starts), building notice (notify and build), or use a competent person scheme for gas, electrical and window work by registered tradespeople. A completion certificate is issued after final inspection.
When Do You Need Building Regulations Approval?
Direct answer
Do I need Building Regulations approval for my project?
Most structural work, heating installations, electrical work in kitchens/bathrooms/outdoors, and window replacements require Building Regulations approval. Small detached outbuildings under 15m2 and conservatories under 30m2 with thermal separation are typically exempt. Apply via full plans (plans approved before work), building notice (notify and build), or use a competent person scheme for gas, electrical and window work.
Determine if your work is notifiable
Check Schedule 2 of the Building Regulations 2010 for exemptions. Most structural work, heating installations and electrical work in kitchens, bathrooms and outdoors is notifiable.
Choose your application route
Full plans application for larger or complex projects. Building notice for simpler works. Competent person scheme for gas, electrical and window replacement by registered tradespeople.
Submit your application before work starts
For full plans, submit plans and pay the fee before starting work. For a building notice, submit the notice at least 48 hours before starting.
Book inspections at key stages
Building Control must inspect work at specific stages (foundations, damp-proof course, concrete slab, structural work, drainage, completion). Book each inspection in advance.
Obtain the completion certificate
After the final inspection, Building Control issues a completion certificate confirming compliance. Keep this document -- it will be needed when selling the property.
| Application route | How it works | Best for | Plans required? |
|---|---|---|---|
| Full plans | Submit plans before work; BCB approves before construction | Larger/complex projects | Yes -- detailed drawings |
| Building notice | Notify BCB before work; no plans; BCB inspects at stages | Simpler works | No |
| Competent person scheme | Registered tradesperson self-certifies | Gas, electrical, windows, boilers | No |
Related KT guides
Frequently Asked Questions
When do I need Building Regulations approval?
Building Regulations approval is required for most building work in England and Wales. This includes: erecting or extending a building, making structural alterations, changing the use of a building, installing or altering heating systems (gas, oil or solid fuel), installing electrical work in kitchens, bathrooms and outdoors, replacing windows and doors, and installing cavity wall insulation. Some minor work is exempt, including small detached outbuildings under 15m2 floor area, conservatories separated from the main dwelling, and some garden structures.
How do I apply for Building Regulations approval?
You can apply through full plans application, building notice, or the competent person self-certification scheme. Full plans: submit detailed plans to the local authority before work starts -- approval is given before construction begins. Building notice: notify the local authority before work starts -- no plans are submitted, and the BCB inspects the work at stages. Competent person scheme: for specific work types (gas, electrical, windows), registered tradespeople self-certify compliance without needing a Building Control application.
What is a full plans application for Building Regulations?
A full plans application involves submitting detailed drawings and specifications to the local authority Building Control before work starts. The BCB checks the plans for compliance with the Building Regulations and issues a decision within 5 weeks (or 2 months with consent). If approved, you receive written approval. This approach provides certainty before construction begins and is recommended for larger or complex projects.
What is the Building Notice procedure?
A building notice is a simpler procedure where you notify the local authority before starting work without submitting detailed plans. The BCB inspects work at key stages. If the work does not comply, the BCB will require it to be altered. Building notices cannot be used for works close to or over a public sewer, work on certain higher-risk buildings, or work requiring a fire safety analysis. The fee is the same as full plans.
What work is exempt from Building Regulations?
Some building work is exempt from the Building Regulations under Schedule 2 of the Building Regulations 2010. Exempt work includes: detached single-storey buildings with floor area under 15m2 that do not contain sleeping accommodation, conservatories and porches under 30m2 with specified thermal separation, small detached garages under 30m2 of floor area that are single-storey and built substantially of non-combustible material, and certain agricultural buildings. Electrical, gas and plumbing work in exempt structures may still require compliance.
Primary sources
Kael Tripton Ltd is registered with the Information Commissioner's Office under registration number ZC135439.
