Expert Planning & Building Regulations Services

It depends on the project and the property. Many single-storey rear extensions and loft conversions can go ahead under permitted development, while larger extensions, new homes, flat conversions and changes of use usually need planning permission. Flats, listed buildings and conservation areas have tighter rules. We assess your property and advise on the right route.

Planning permission controls what you build (its size, appearance and use) and is decided by the council's planning department. Building Regulations control how it is built (structure, fire safety, insulation, ventilation and drainage) and are checked by Building Control. Most building work needs Building Regulations approval even when it doesn't need planning permission.

Allow 6–12 weeks (estimated) for planning permission, including preparing and submitting the application and liaising with the local authority. The drawings themselves typically take 1–4 weeks, and structural engineering and Building Regulations 1–3 weeks, depending on complexity. All timelines are indicative. Your project-specific schedule is confirmed before construction.

If your project falls under permitted development, a Lawful Development Certificate from the council confirms that it is lawful. It isn't always required, but it gives you, and any future buyer, written proof that the work didn't need planning permission.

Planning drawings and Building Regulations drawings each start from £2,000. Your quote depends on the size and complexity of the project, so book a free consultation and we will confirm the price.