Permitted Development Extensions in Kensington and Chelsea

We provide clear, professional guidance on permitted development extensions in Kensington and Chelsea 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 Kensington and Chelsea

• Incorrect measurement from original dwelling
• Materials not matching existing dwelling
• Prior approval required but not obtained
• Article 4 Direction restrictions
• Extension built beyond original rear wall line
• Extension within a conservation area in Kensington and Chelsea

Property Types We Advise On in Kensington and Chelsea

• Chalet-style houses
• Properties within conservation areas
• 1930s suburban homes
• Terraced houses
• Bungalows

Frequently Asked Questions

Are there restrictions on side-facing windows?

Yes. Upper-floor side-facing windows typically must be obscure-glazed and non-opening below a certain height.

Will neighbours be notified?

Under prior approval procedures or planning applications, neighbours are typically notified.

What is the maximum rear projection allowed?

Detached houses may extend up to four metres under standard rules, or eight metres with prior approval. Smaller limits apply to other house types.

Can I extend above a single-storey extension?

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

Is planning permission needed for internal alterations?

Internal changes usually do not require planning permission unless the property is listed.

Are side extensions allowed under permitted development?

Side extensions are permitted in some cases, but must not exceed half the width of the original house and must meet height limits.

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