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.

Northolt · Middlesex

Garden Annexe in Northolt

Serving the London Borough of Ealing planning area · Northolt (Central line)

Self-contained living spaces perfect for guests, family, or rental income. Built to our 2026 Part L standard — adding £20,000–£50,000 to your Northolt property. From £65,000.

0.15 W/m²K

U-value

£20,000–£50,000

Value uplift

25–40 days

Build time

£103

LDC fee

Trusted by homeowners in Northolt

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Matched to Northolt installers who know London Borough of Ealing planning requirements.

Garden Annexe in Northolt, Middlesex

Northolt is a well-connected Middlesex suburb on the Central line, with a mix of post-war housing and more recent developments. Its location adjacent to the A40 provides easy road access across West London, and the area's predominantly owner-occupied housing stock supports a healthy market for home improvement projects. Northolt's post-war semi-detached houses often feature rear gardens of 50–60 feet that are well-suited to compact garden office and gym builds. The area's improving property fundamentals — driven by Elizabeth line proximity at nearby Southall and Hayes — mean that garden room investment is increasingly well-timed.

Why Northolt 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 Northolt — London Borough of Ealing

Northolt is within the London Borough of Ealing's planning jurisdiction. No significant conservation area restrictions apply across Northolt's main residential areas. Standard Permitted Development rules apply. The LDC fee is £103.

£103

LDC fee

2.5m

Max height (boundary)

50%

Max garden coverage

London Borough of Ealing Portal Full PD Guide 2026

How We Work in Northolt

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 Northolt

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

View Portfolio

Garden Annexe FAQs — Northolt

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