Rear extension drawings in Wallington, SM6

What a rear extension in SM6 can do without full planning

For a house other than a detached one, a single-storey rear extension may go up to 3 metres beyond the original rear wall under permitted development. A detached house has its own, different limit, so check which type of house you own before you measure anything.

There is a second route. A larger home extension, still single storey, can reach up to 6 metres beyond the original rear wall for a house other than detached, but it goes through the prior approval process rather than being simply allowed.

Both routes start from the same thing: an accurate drawing of the house as it stands and of the extension you want. That is the part we draw.

How Sutton has been deciding householder applications

Wallington applications go to Sutton. In the latest four quarters of published government statistics, Sutton decided 601 householder applications, counting prior approvals, and 92% of them were granted.

In the same figures, 95% of householder decisions, prior approvals excluded, were made within 8 weeks. These are borough-wide totals, not a forecast for your street, and they say nothing about any single design.

If a decision goes to appeal

The Planning Inspectorate's casework database shows 139 householder appeals decided for Sutton, allowed or dismissed. 41% of them were allowed.

Most owners never need this, but it is useful context: a refusal is not always the end, and clear drawings make an appeal case easier to put together.

Typical questions from SM6 and nearby searches

People searching for a rear extension in Sutton or Wallington often type in a house type as well, such as a side extension, a rear house extension or a double storey extension. The 3 metre and 6 metre limits above are for the rear wall of the original house, so a side or second-storey addition is judged on different rules.

Tell us what you want to build when you request a quote and we will say which of our services fits it.