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 Annexes in Ickenham

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

Ickenham's deep inter-war gardens and conservation area setting support Building Control-compliant garden annexes that are discreet, well-finished, and genuinely liveable as independent accommodation. Our Hillingdon installers build from £65,000 with full kitchen and bathroom fit-out and separate utility connections, adding between £35,000 and £80,000 to properties in one of Middlesex's most desirable small suburbs.

0.15

U-value

£35,000–£80,000

Value uplift

25–40 days

Build time

Trusted by homeowners in Ickenham

Get Your Free Quote

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

Garden Annexes in Ickenham

The 1930s detached and semi-detached homes with deep gardens that characterise Ickenham make it particularly well-suited to self-contained habitable garden annexe construction. As a village conservation area with strong community identity, the area attracts established families and retirees who increasingly see creating independent living space for family members, guests, or rental income as a practical upgrade rather than a luxury. Every build we recommend here includes full Building Control compliance, kitchen and bathroom plumbing, separate utility connections, and fire-rated construction, meeting the 2026 Part L standard that Hillingdon now expects.

Provide comfortable, independent living space for family members with a self-contained garden annex. Perfect for elderly relatives (Granny Annexes), young adults needing independence, guest accommodation, or even rental income. Our recommended installers build fully habitable homes to building control standards, complete with kitchens, bathrooms, and living areas. They offer a cost-effective alternative to care homes, house extensions, or buying a separate property.

Planning Authority: 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 is required.

Why Choose This?

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

Full kitchen and bathroom installation

Building Control compliant construction

Accessible design options (ramps, wet rooms, wide doorways)

High-performance insulation exceeding Part L requirements (U-value 0.15 W/m²K)

Separate utility connections and metering

How It Works

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.

Garden Annexes in Ickenham — FAQs

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.

More garden room types in Ickenham

Garden Offices Garden Gyms Music Studios Art Studios Bespoke Rooms All Garden Rooms in Ickenham →

Get Your Free Garden Annexes Quote in Ickenham

Matched to vetted Ickenham installers within 24 hours. Up to 3 competitive quotes from specialists who know London Borough of Hillingdon planning requirements.