When improving or altering your home, it’s easy to assume that if the work is inside the property, no formal approvals are required. In reality, many common home improvements are controlled by planning legislation and building regulations, each serving a different purpose and both important to get right.
Planning permission governs what you can build and how it affects neighbours, appearance and the local area. Building regulations deal with how the work is carried out, ensuring structural stability, fire safety, energy efficiency and electrical and gas safety. Even when planning permission is not required, building regulations approval often still applies.
Common works that require building regulations approval
Some of the most frequently overlooked items include:
Chimney breast removals
Removing a chimney breast almost always requires building regulations approval because it affects the structure of the building. Suitable support, such as steel beams or other approved methods, must be installed and inspected. A completion certificate should be retained as evidence of compliance.
Removal or alteration of load-bearing walls
Any work that alters a load-bearing wall requires approval under building regulations. Structural calculations are usually needed, and the work must be inspected by Building Control before being signed off.
Consumer unit (fuse board) replacements
Replacing a consumer unit is classed as notifiable electrical work. This must be carried out by a Part P registered electrician who can self-certify the work, or alternatively inspected and approved by Building Control. Certification is essential, particularly when selling a property.
Boiler replacements
Most boiler replacements require building regulations approval. Gas boilers must be installed by a Gas Safe registered engineer, who will notify Building Control and issue compliance certification. This paperwork is frequently requested during conveyancing.
Log burners and solid fuel stoves
Installing a log burner or solid fuel appliance is also controlled work. Approval is required to ensure compliance with fire safety, ventilation and flue regulations. Installations are typically signed off by a HETAS registered installer or Building Control.
Window and door replacements
Replacement windows and external doors must meet current thermal performance and safety standards. Installations are usually certified through a FENSA or CERTASS registered installer, or alternatively approved by Building Control.
Conservatories
Some conservatories may be exempt from building regulations if they meet strict criteria, such as being thermally separated from the main house and having independent heating. However, larger or more permanent structures often require full building regulations approval and, in some cases, planning permission.
Garage conversions
Garage conversions usually fall under permitted development for planning, but they almost always require building regulations approval. This covers insulation, ventilation, fire separation, drainage, and structural alterations.
Planning permission considerations
Planning permission is not usually required for internal alterations, but it may be needed for extensions, roof alterations, changes to the external appearance, or developments that exceed permitted development limits. Additional controls apply to listed buildings and properties within conservation areas, where consent is often required even for internal works.
What happens if approvals were never obtained?
Where planning or building regulation requirements have not been met, there are ways to resolve the issue:
- Planning matters may be addressed by applying for retrospective planning permission. In some cases, enforcement action is no longer possible if the development has become lawful through the passage of time.
- Building regulations issues can often be resolved by applying for a Regularisation Certificate. This may involve inspections, opening up works, or carrying out remedial works to demonstrate compliance.
- Indemnity insurance is sometimes used for historic issues, but it does not confirm compliance and has limitations, particularly if the local authority is already aware of the works.
Final thoughts
Before starting any work, homeowners should always check whether planning permission or building regulations approval is required. Keeping copies of approvals and completion certificates can save time, stress and cost later—especially when selling, remortgaging or carrying out further alterations. When in doubt, professional advice early on is almost always the safest route.
