Permitted Development Extensions in Harrow

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

• Eaves height exceeding 3 metres near boundary
• Extension within a conservation area in Harrow
• Raised decking exceeding permitted height
• Extension built beyond original rear wall line
• Two-storey extension too close to rear boundary
• Overall height above permitted maximum

Property Types We Advise On in Harrow

• Victorian properties
• Properties with previous extensions
• Corner plot homes
• Townhouses
• Terraced houses

Frequently Asked Questions

Can I convert my garage into living space?

Garage conversions are often permitted development, but planning restrictions may apply depending on conditions attached to the original approval.

Can I extend onto agricultural land?

Residential permitted development rights apply only within the residential curtilage.

Does permitted development apply to new-build homes?

Some new-build homes have permitted development rights removed by planning condition.

Can I build over a sewer?

Building near or over a public sewer may require a build-over agreement from the relevant water authority.

Can I add bi-fold doors to my extension?

Yes, provided the extension itself complies with permitted development rules and glazing requirements meet building regulations standards.

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 Harrow and want to confirm whether it qualifies under permitted development rules, request a free assessment today and get clarity before you build.