House Extension Architects in Welwyn Garden City.
An extension is the most common way to get the home you want without moving. We design extensions that are approved, buildable, and worth the spend. AH Architecture is a chartered, ARB registered practice working across Welwyn Garden City.
House Extension in Welwyn Garden City
Designed around light and how you live
A good extension is not just more floor area. It is about where the light falls, how the new space connects to the garden and the existing rooms, and how the whole house works once it is finished. We start from how you actually use the home, then design the structure and the openings around that, rather than bolting a box on the back.
The planning route decided early
Some extensions fall under permitted development and need only a lawful development certificate. Others need full planning permission, where neighbour amenity, the 45-degree rule, and the impact on the street all come into play. We work out which route applies to your property before any design is committed, so the scheme is shaped to pass.
Buildable, costed, coordinated
We produce a technical package a contractor can price and build from, coordinate the structural engineer, and handle party-wall matters with neighbours where the work affects a shared boundary. The aim is no surprises once you are on site.
House Extension we design in Welwyn Garden City
- Single-storey rear extensions
- Side return extensions
- Wraparound extensions
- Double-storey extensions
- Two-storey side extensions
- Garden rooms and outbuildings
Planning in Welwyn Garden City
Approved is a local question.
A house extension in Welwyn Garden City is decided by Welwyn Hatfield Borough Council, against its own local plan. Many single-storey rear extensions are possible under permitted development, sometimes under the larger home extension prior-approval route, subject to size limits and your property not being on designated land. Much of Welwyn Garden City sits within conservation areas, and some of it is listed, so permitted development rights are often removed here and careful design plus the right consents matter. We check your specific address before anything is drawn.
Other services in Welwyn Garden City
Planning a house extension in Welwyn Garden City?
The first conversation is free, on the phone or on site. We tell you whether it works, the planning likelihood for Welwyn Hatfield Borough Council, and a realistic next step.
Book a free Clarity Call