Permitted Development Extensions in Knowl Hill

We provide clear, professional guidance on permitted development extensions in Knowl Hill 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 Knowl Hill

• Incorrect measurement from original dwelling
• Side extension exceeds half the width of the original house
• Article 4 Direction restrictions
• Eaves height exceeding 3 metres near boundary
• Overall height above permitted maximum
• Outbuilding positioned forward of principal elevation

Property Types We Advise On in Knowl Hill

• Homes subject to Article 4 Directions
• Detached houses in Knowl Hill
• Properties with previous extensions
• Semi-detached houses
• 1930s suburban homes

Frequently Asked Questions

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.

Can I remove a chimney without permission?

External alterations may require permission depending on property type and location.

Are garden rooms permitted development?

Garden rooms may qualify if they meet size and usage limits and are not used as separate accommodation.

Does my extension need to match existing materials?

While not always mandatory under permitted development, matching materials is often recommended for visual consistency.

What happens if I build without permission?

The council may take enforcement action requiring alterations or removal of unauthorised works.

What measurements are used for height?

Height is typically measured from the highest ground level adjacent to the building.

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