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.

Bushey · Hertfordshire

Garden Annexe in Bushey

Serving the Hertsmere Borough Council planning area · Bushey (Overground)

Self-contained living spaces perfect for guests, family, or rental income. Built to our 2026 Part L standard — adding £30,000–£72,000 to your Bushey property. From £65,000.

0.15 W/m²K

U-value

£30,000–£72,000

Value uplift

25–40 days

Build time

£103

LDC fee

Trusted by homeowners in Bushey

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Matched to Bushey installers who know Hertsmere Borough Council planning requirements.

Garden Annexe in Bushey, Hertfordshire

Bushey is a well-established Hertfordshire commuter town bordering the London Borough of Harrow, with Overground services to London Euston in under 25 minutes. Its residential streets — particularly in Bushey Heath — feature some of the most generous garden sizes in the south Hertfordshire corridor, and its proximity to the capital makes it a natural fit for professional family households. Bushey Heath in particular offers detached homes on substantial plots, regularly exceeding 100 feet in depth, that provide exceptional scope for large bespoke garden room builds. The area's high proportion of long-term owner-occupiers means gardens are well-established and mature — lending a ready-made setting to architectural garden rooms.

Why Bushey 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 Bushey — Hertsmere Borough Council

Bushey is outside the Greater London boundary and falls under Hertsmere Borough Council's planning jurisdiction. Standard Permitted Development rights apply as they do in Greater London, but applications are made to Hertsmere rather than a London borough. The LDC fee is £103. Your installer will flag this distinction and ensure the correct application route is followed.

£103

LDC fee

2.5m

Max height (boundary)

50%

Max garden coverage

Hertsmere Borough Council Portal Full PD Guide 2026

How We Work in Bushey

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 Bushey

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

View Portfolio

Garden Annexe FAQs — Bushey

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