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.

Ickenham · Middlesex

Garden Annexe in Ickenham

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

Self-contained living spaces perfect for guests, family, or rental income. Built to our 2026 Part L standard — adding £35,000–£80,000 to your Ickenham property. From £65,000.

0.15 W/m²K

U-value

£35,000–£80,000

Value uplift

25–40 days

Build time

£103

LDC fee

Trusted by homeowners in Ickenham

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

Garden Annexe in Ickenham, Middlesex

Ickenham is one of Middlesex's most desirable small suburbs — a village green, a conservation area covering the historic core, and wide, tree-lined residential streets of substantial inter-war and post-war detached houses. Its combination of generous gardens and high household incomes makes it a consistently active area for bespoke garden room projects. The detached and large semi-detached properties around Ickenham's residential streets regularly feature rear gardens of 80 feet or more — more than sufficient for a substantial bespoke garden room with architectural finishes. The quality of finishes expected here is high, and our recommended installers deliver accordingly.

Why Ickenham 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 Ickenham — London Borough of Hillingdon

Ickenham Village Conservation Area covers the green and its immediate environs. Most residential garden builds on the wider streets fall outside conservation restrictions and proceed as Permitted Development. For properties on or adjacent to the conservation area boundary, your installer will confirm whether full planning permission or a simple LDC (£103) applies.

£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 Ickenham

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 Ickenham

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

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Garden Annexe FAQs — Ickenham

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