Covering Hertfordshire
Our coverage across Hertfordshire includes Watford, Hemel Hempstead, Stevenage and St Albans.
Homes in the East of England
Across the East of England, newer estates often have integral garages and room for rear extensions, while older towns have Victorian terraces and conservation areas that shape what can be built.
What goes into a garden annexe?
A garden annexe is a separate single-storey building in the grounds of a house with its own bedroom, bathroom and kitchenette, used by family members as part of the main household. Unlike a garden office, an annexe that people sleep in normally needs planning permission and full building regulations approval.
- Kitchenette and shower room
- Heating, hot water and electrics
- Accessible design options for older relatives
How much does a garden annexe cost in Hertfordshire?
What garden annexes typically cost. These are guide ranges; the written quote for your house replaces them.
| Garden annexes | Guide price incl. VAT |
|---|---|
| Standard specification | £2,400 to £2,900 per m² |
| Good specification | £2,900 to £3,400 per m² |
| High specification | £3,400 to £3,900 per m² |
What approvals does a garden annexe need in England?
English projects need planning clearance from the local council, building regulations sign-off from building control, and party wall notices where the work is on or near a shared boundary. We prepare and manage all three.
A self-contained annexe used for sleeping and living normally needs planning permission in England. Permitted development for outbuildings does not cover living accommodation.
What can affect a garden annexe?
- The annexe normally has to remain part of the main household, not let as a separate home.
- A level threshold and wider doors make the annexe suitable for later life.
From first call to completion
- Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
- Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
- Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Your questions answered
Do I need planning permission for a garden annexe?
Usually yes, because people will sleep in it. Outbuilding permitted development does not cover living accommodation.
How much does a garden annexe cost?
Around £2,400 to £3,900 per square metre including VAT, depending on finish and services.
Who deals with the council for a project in Hertfordshire?
We do. We prepare the drawings, submit planning or permitted development paperwork if needed, and arrange building control inspections.
Also covering
- Garden annexes in Watford
- Garden annexes in Hemel Hempstead
- Garden annexes in Stevenage
- Garden annexes in St Albans
- Garden annexes in Welwyn Garden City
- Garden annexes in Cheshunt
- Garden annexes in Hatfield
- Garden annexes in Bishop's Stortford
- Garden annexes in Borehamwood
- Garden annexes in Hitchin
- Garden annexes in Hoddesdon
- Garden annexes in Letchworth Garden City
- Garden annexes in Harpenden
- Garden annexes in Bushey
- Garden annexes in Hertford
- Garden annexes in Rickmansworth
- Garden annexes in Potters Bar
- Garden annexes in Berkhamsted
Learn more about garden annexes, or see every project we cover in Hertfordshire.