Garden annexes have become increasingly popular for accommodating elderly relatives, adult children, or creating rental income. But how much should you expect to pay in 2026?
Understanding Garden Annexe Pricing
Garden annexe costs vary significantly based on size, specification, and features. Unlike basic garden rooms, annexes include full living facilities such as bathrooms, kitchenettes, and sometimes bedrooms.
Price Ranges in 2026
Here's a general guide to what you can expect:
- Basic Annexe (15-20 sqm): £35,000 - £50,000
- Mid-Range Annexe (20-30 sqm): £50,000 - £75,000
- Premium Annexe (30-50 sqm): £75,000 - £120,000+
What Affects the Price?
Several factors influence the final cost:
- Size and footprint
- Quality of insulation and materials
- Bathroom and kitchen specifications
- Windows and doors
- Heating and air conditioning
- Internal fit-out and finishes
- Site access and groundworks
What's Included in a LouMil Annexe?
Our garden annexes are fully turnkey solutions including:
- Full structural warranty
- Complete electrical installation
- Plumbing and drainage
- High-performance insulation
- Premium doors and windows
- Internal finishing to your specification
Finance Options
We offer flexible finance options to help spread the cost. Many customers find this makes their dream annexe much more achievable.
