Building control
Building regulations for Kent extensions — the bits that matter on site
Planning gets the headlines. Building control decides whether the extension is safe, warm and properly built. This guide covers what Medway homeowners should expect.
Planning yes, building regs still apply
Even if Medway Council says you do not need planning permission, building regulations almost always apply to an extension. Structure, thermal performance, fire safety, drainage, electrics and ventilation all need proper detailing and inspection.
You can go through local authority building control or an approved inspector. Either way, notify before work starts and expect inspections at key stages — foundations, damp-proof course, steels, drainage and completion.
What inspectors look for
Foundations need the right depth and bearing for your ground. Insulation and airtightness have tightened up in recent years. Openings need steels sized by an engineer, not guessed from the last job.
Drainage diversion, rainwater goods and how the new roof ties into the existing one are regular trip-ups on Kent sites. We design the build sequence around inspections so you are not waiting with an open hole in wet weather.
- Foundations and ground conditions
- Structural steel and padstones
- Insulation and thermal bridging
- Electrics, heating and ventilation
- Completion certificate for the solicitor file
Why the certificate matters
When you sell, buyers' solicitors ask for building control sign-off. Missing paperwork on an older extension can mean retrospectives, indemnity insurance or a painful renegotiation.
Napwood builds for sign-off as standard — not as an optional extra bolted on at the end.
FAQs
Frequently asked questions
Do I need building regs if I have permitted development?
Almost always yes for an extension. Permitted development only covers planning. Structure and compliance still need building control.
What is a completion certificate?
It is formal confirmation that the inspected works meet the regulations. Keep it with your deeds and planning paperwork.
Can I start without notifying building control?
You should not. Unnotified work risks stop notices, remedial costs and problems when you sell.
Does Napwood handle the applications?
We coordinate the build around building control and work with your designer or approved inspector. Application routes vary by project — we talk it through at the start.
Ready to discuss your project? Call us or request a free estimate today.
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