West Sussex · RH15
Annexes in Burgess Hill
An annexe is self-contained living accommodation on the same plot as a main house, complete with its own kitchen and bathroom facilities, built either as a new detached structure, a conversion of an existing outbuilding, or an extension with its own entrance.
In Burgess Hill, that covers St Andrews, Gattons, Kings Way, Fairfield, Leylands, Victoria Park, Wivelsfield Green. Burgess Hill has expanded substantially since the Victorian era, with a historic core supplemented by significant 20th and 21st-century housing development, including several large newer estates on the town's edges. This mix means both period-property refurbishment and more straightforward extension work on modern housing are common locally.
Coverage
Areas we cover in Burgess Hill for annexes
Property styles in Burgess Hill
Victorian and Edwardian housing sits close to the town centre, with substantial areas of postwar and recent new-build estate housing across the wider town. Newer estate housing typically has more straightforward extension potential, subject to individual developer restrictive covenants which we advise clients to check.
Planning considerations
Mid Sussex District Council is the local planning authority. Some newer developments carry restrictive covenants set by the original developer that go beyond standard planning control — worth checking your title deeds alongside our planning assessment.
How it works
Our annexes process
- 01
Feasibility and planning strategy
Assessing the plot, existing structures and local planning policy for ancillary accommodation, and whether a new build, conversion or extension route is best.
- 02
Design and approvals
Preparing drawings, submitting for planning permission (usually required for annexes with independent facilities) and Building Regulations.
- 03
Construction
Groundworks and structure (for a new build), or structural and fabric works to the existing building (for a conversion), followed by full services connections.
- 04
Fit-out and completion
Kitchen and bathroom fit-out, decoration, and Building Control sign-off.
Also in this area
Other services we provide in Burgess Hill
Nearby coverage
Annexes in nearby areas
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FAQs
Annexes in Burgess Hill: FAQs
Do you provide annexes across all of Burgess Hill?
Yes, we cover the RH15 postcode area in full, including St Andrews, Gattons, Kings Way, Fairfield, Leylands, Victoria Park, Wivelsfield Green.
Do I need planning permission for an annexe?
Usually yes, because independent cooking, sleeping and washing facilities mean the structure is not treated as a simple outbuilding. Some annexes intended purely as ancillary accommodation for the main house can fall under permitted development, but this depends on size, position and local policy, which we check during feasibility.
Can an existing garage or outbuilding be converted into an annexe?
Yes, provided the structure is suitable and can be brought up to full Building Regulations standard for insulation, damp-proofing and services. We assess this as part of the feasibility stage alongside a new-build option.
Do new-build estates in Burgess Hill have restrictions on extending?
Some do, through developer-imposed restrictive covenants in addition to normal planning control. We recommend checking your title deeds, and we factor this into our feasibility advice where relevant.
Get a quote for annexes in Burgess Hill
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Last reviewed 2026-07-28.