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.

Ruislip · Middlesex

Garden Annexe in Ruislip

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

Self-contained living spaces perfect for guests, family, or rental income. Built to our 2026 Part L standard — adding £35,000–£82,000 to your Ruislip property. From £65,000.

0.15 W/m²K

U-value

£35,000–£82,000

Value uplift

25–40 days

Build time

£103

LDC fee

Trusted by homeowners in Ruislip

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

Garden Annexe in Ruislip, Middlesex

Ruislip is a premium Middlesex suburb built around a historic village core, Ruislip Lido, and one of the finest residential street networks in the Hillingdon borough. Its combination of excellent tube links, high-quality period and inter-war housing, and access to Ruislip Woods makes it a consistently sought-after address for professional families. Ruislip's varied housing stock — from the characterful cottages around the old village to the larger 1930s detached homes in Manor Farm and Ruislip Manor — creates a wide range of garden room opportunities. Larger plots in Ruislip Gardens and South Ruislip regularly support substantial bespoke builds. The premium household profile supports investment in the highest specification.

Why Ruislip 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 Ruislip — London Borough of Hillingdon

Ruislip Old Village Conservation Area covers the historic core. Most residential garden builds proceed as Permitted Development. For properties in or adjacent to the conservation area, Hillingdon's design guidance applies. Your installer will check your position at survey stage. LDC fee: £103.

£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 Ruislip

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 Ruislip

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

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Garden Annexe FAQs — Ruislip

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