Permitted Development Extensions in Chatham

We provide clear, professional guidance on permitted development extensions in Chatham 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 Chatham

• Materials not matching existing dwelling
• Raised decking exceeding permitted height
• Prior approval required but not obtained
• Two-storey extension too close to rear boundary
• Listed building restrictions
• Extension covering more than 50% of garden area

Property Types We Advise On in Chatham

• New build developments
• Properties within conservation areas
• Detached houses in Chatham
• Victorian properties
• Chalet-style houses

Frequently Asked Questions

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.

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.

Do I need structural calculations?

Yes, building regulations often require structural calculations for beams, foundations, and load-bearing elements.

Can I appeal a planning refusal?

Yes. Applicants may appeal to the Planning Inspectorate within specified time limits.

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.

What is the 45-degree rule?

The 45-degree rule is a guideline used by some councils to assess impact on neighbouring properties, particularly in relation to light and outlook.

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