Can I rent out a garden annex?

This depends on your planning permission conditions. Some approvals restrict use to 'ancillary' accommodation for family only, while others permit independent letting. We recommend discussing your intentions with your installer at the feasibility stage.

How much does a garden annex cost?

Garden annexes typically start from £65,000 and range to £120,000+ depending on size, specification, and finishing level. While this is more than a standard garden room, it's significantly less than a traditional extension or buying additional property.

Can I rent out a garden annex?

This depends on your planning permission conditions. Some approvals restrict use to 'ancillary' accommodation for family only, while others permit independent letting. We recommend discussing your intentions with your installer at the feasibility stage.

How much does a garden annex cost?

Garden annexes typically start from £65,000 and range to £120,000+ depending on size, specification, and finishing level. While this is more than a standard garden room, it's significantly less than a traditional extension or buying additional property.

Uxbridge · Middlesex

Garden Annexe in Uxbridge

Serving the London Borough of Hillingdon planning area · Uxbridge (Metropolitan & Piccadilly lines)

Self-contained living spaces perfect for guests, family, or rental income. Built to our 2026 Part L standard — adding £28,000–£68,000 to your Uxbridge property. From £65,000.

0.15 W/m²K

U-value

£28,000–£68,000

Value uplift

25–40 days

Build time

£103

LDC fee

Trusted by homeowners in Uxbridge

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Matched to Uxbridge installers who know London Borough of Hillingdon planning requirements.

Garden Annexe in Uxbridge, Middlesex

Uxbridge is the main commercial and administrative centre of the London Borough of Hillingdon, positioned at the western boundary of Greater London. Its residential hinterland spans a broad range of housing types — from Victorian terraces near the centre to large post-war detached homes in the quieter northern suburbs — all within comfortable reach of the tube terminus. The residential suburbs north and west of Uxbridge town centre, including Hillingdon and Cowley, offer excellent plot sizes for garden room installation. Uxbridge's position on the Metropolitan and Piccadilly lines also makes it a natural location for professional home office investment — with a 50-minute tube journey to King's Cross that many residents prefer to avoid.

Why Uxbridge Homeowners Choose This Build

Keep family close while maintaining independence and privacy

Cost-effective alternative to care homes or house extensions

Increase your property value significantly

Faster construction compared to traditional building extensions

Potential rental income stream (subject to planning)

2026 Technical Specification

Wall construction150mm SIPs panels

U-value (wall)0.15 W/m²K

GlazingA-rated argon-filled

Acoustic reduction40dB+ standard

Data infrastructureCAT6A (10Gbps ready)

ElectricsPart P compliant

FoundationsGround screws (no concrete)

Build time25–40 days

FSC-certified timber · Ground screw foundations · Just One Tree partner

Planning in Uxbridge — London Borough of Hillingdon

Uxbridge Old Market Conservation Area covers the historic town centre only — the surrounding residential streets operate standard Permitted Development rules. Most garden room builds in the Uxbridge residential areas qualify as PD. The LDC fee is £103.

£103

LDC fee

2.5m

Max height (boundary)

50%

Max garden coverage

London Borough of Hillingdon Portal Full PD Guide 2026

How We Work in Uxbridge

Feasibility Assessment

Check planning viability, site suitability, and building control requirements for habitable space.

Planning Application

Full management of the planning permission process, including design and submit documentation.

Building Control

Ensuring all regulations for habitable space are met, including fire safety and accessibility.

Complete Construction

Full build including all utilities, plumbing, electrics, and interior finishes.

See Completed Projects Near Uxbridge

Real builds with specs, materials, and planning routes documented.

View Portfolio

Garden Annexe FAQs — Uxbridge

Yes. Garden annexes intended for sleeping or living accommodation almost always require planning permission. Our partner installers manage the full application process on your behalf and can advise on the likelihood of approval in your specific borough.

“The team connected me with a fantastic installer who built my garden office in under 10 days. It's warm, quiet, and I love working from it every day.”

Sarah J.

Wimbledon, SW London · Garden Office

“Quick, professional, and totally transparent. I compared three quotes and picked the best one. My music studio is perfectly soundproofed.”

David M.

Highgate, North London · Music Studio