Extensions in Didcot: design, planning and build

Areas we cover around Didcot

Across OX11, we can visit, measure and advise. We also work in nearby Abingdon (5 miles), Wantage (8 miles), Oxford (10 miles), Thame (14 miles), Henley-on-Thames (14 miles). Thatcham, in Berkshire, is roughly 14 miles from Didcot and also on our list.

• Abingdon
• Wantage
• Oxford
• Thame
• Henley-on-Thames

Approvals for an extension in Didcot

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 extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.

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).

What extensions cost in Didcot

We publish guide prices so you can budget before anyone visits. For Didcot they are adjusted by ×1.12, the factor we use across South East England.

Choosing the right extension in Didcot

In the South East, plenty of houses have already been extended once, which makes checking the remaining permitted development allowance an important early step.

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