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.

Hampstead · North London

Garden Annexe in Hampstead

Serving the London Borough of Camden planning area · Hampstead (Northern line)

Self-contained living spaces perfect for guests, family, or rental income. Built to our 2026 Part L standard — adding £65,000–£145,000 to your Hampstead property. From £65,000.

0.15 W/m²K

U-value

£65,000–£145,000

Value uplift

25–40 days

Build time

£103

LDC fee

Trusted by homeowners in Hampstead

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Matched to Hampstead installers who know London Borough of Camden planning requirements.

Garden Annexe in Hampstead, North London

Hampstead is one of London's most prestigious residential addresses — a hilltop village of Georgian and Victorian architecture, independent shops, and views across the Heath. Its property values consistently rank among the highest in the capital, and its homeowners expect the finest finishes in every aspect of their homes, including the garden. Hampstead properties often feature walled or terraced gardens with significant character. A bespoke garden room here, designed with conservation sensitivity and premium materials, can add £65,000–£145,000 to an already high-value property. The discerning Hampstead buyer specifically looks for spaces of this quality.

Why Hampstead 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 Hampstead — London Borough of Camden

Most of Hampstead sits within the Hampstead and Fitzjohns Conservation Area. Camden's planning team requires outbuildings to be sympathetically designed with appropriate materials — timber, brick, and natural slates are typically acceptable; industrial composite finishes are not. Full planning permission may be required for some builds. The LDC fee is £103.

£103

LDC fee

2.5m

Max height (boundary)

50%

Max garden coverage

London Borough of Camden Portal Full PD Guide 2026

How We Work in Hampstead

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 Hampstead

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

View Portfolio

Garden Annexe FAQs — Hampstead

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