House extensions in Sunbury-on-Thames

Where we work near Sunbury-on-Thames

We cover Sunbury-on-Thames and the postcode districts KT12, TW16, TW17. The same team covers Walton-on-Thames (1 mile), West Molesey (2 miles), Ashford, Surrey (3 miles), Weybridge (3 miles), East Molesey (3 miles), all within easy reach. Hampton, in Greater London, is roughly 2 miles from Sunbury-on-Thames and also on our list.

• Walton-on-Thames
• West Molesey
• Ashford, Surrey
• Weybridge
• East Molesey

Approvals for an extension in Sunbury-on-Thames

In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.

In England a single-storey side return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.

In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.

If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.

Applications are decided by the local planning authority (your district, borough or unitary council).

Guide prices for Sunbury-on-Thames

Every figure below is a guide for Sunbury-on-Thames, adjusted for South East England build costs (×1.12) and including VAT. Design and council fees are shown separately on each page.

Choosing the right extension in Sunbury-on-Thames

Homes across the South East range from Victorian terraces in the older town centres to large detached houses on the edges, so the right extension type varies street by street.

Start by comparing double-storey extensions, single-storey rear extensions and orangery extensions: between them they cover most of the layouts we see requested for houses like these.