Permitted Development Extensions in Lewisham

We provide clear, professional guidance on permitted development extensions in Lewisham and surrounding areas. Whether you’re planning a rear, side, or two-storey extension, understanding local planning constraints and national permitted development limits is essential before work begins.

Common Permitted Development Issues in Lewisham

• Materials not matching existing dwelling
• Extension on a flat or maisonette
• Overall height above permitted maximum
• Outbuilding positioned forward of principal elevation
• Extension covering more than 50% of garden area
• Overlooking concerns from upper floor windows

Property Types We Advise On in Lewisham

• Properties with previous extensions
• New build developments
• 1930s suburban homes
• Bungalows
• Rural properties

Frequently Asked Questions

How close can I build to my neighbour’s boundary?

Extensions built close to a boundary must meet height and eaves restrictions, especially if within two metres of the boundary.

Can I convert my loft and add a dormer?

Dormer loft conversions are often permitted development within volume limits.

Will permitted development rules change?

Planning legislation can change over time, so it is important to check current regulations.

What is prior approval neighbour consultation?

For larger extensions, councils notify neighbours and assess specific impacts before granting prior approval.

Can I extend above a single-storey extension?

Possibly, but this often requires planning permission and must comply with height and design considerations.

How is the original house defined for measurement purposes?

The “original house” refers to the property as it stood on 1 July 1948 or when it was first built, not including later extensions.

If you're planning an extension in Lewisham and want to confirm whether it qualifies under permitted development rules, request a free assessment today and get clarity before you build.