The Studio Annexe
From £90,000
Or from £750/month
Complete and ready to move in. Zero VAT under the Caravan Act.
A self-contained home for one person who wants to stay close to family without giving up their independence. Open-plan layout with kitchen, bathroom, and living/sleeping area, all in 400 sq ft.
Inside the Studio
Practical Layout
At approximately 400 sq ft, the Studio uses an open-plan layout with distinct zones for living, sleeping, cooking, and bathing. The space is sized for one person and designed to work for everyday life.
20ft × 20ft
Internal footprint
400 sq ft
Living space
2.4m
Internal ceiling height
Open Plan
Living, sleeping & kitchen
Room Breakdown
Everything Included
The Studio price includes everything listed below. No hidden extras. The annexe is ready to move into on handover.
WarmWall 250mm Insulation
250mm thick walls with double insulation. U-value of 0.15 W/m2K, which is well above Building Regulations requirements. This keeps heating bills low and the annexe warm in winter, cool in summer.
Fully Fitted Kitchen
Base and wall units, worktops, sink, integrated oven, hob, extractor, and space for a fridge/freezer.
Bathroom
Walk-in shower (level access, no step), WC, vanity basin, heated towel rail, and chrome fixtures.
Heating System
Energy-efficient electric heating throughout, designed to work with our WarmWall insulation for minimal running costs. Each room has individual thermostatic control.
Complete Electrics
Full electrical installation with consumer unit, ample sockets throughout, LED lighting, smoke and CO detectors. Ready for TV, phone, and internet from day one.
Double Glazing
High-quality uPVC double-glazed windows and French doors. Energy-efficient, secure, and maintenance-free with a 10-year guarantee.
Interior Finish
Plastered and painted walls in your choice of colours, quality flooring throughout, skirting boards, architraves, and interior doors. Move-in ready.
Plumbing
Complete hot and cold water supply, waste connections, and all internal plumbing. Utility connections are quoted separately based on your garden layout.
External Finish
Insulated steel panel exterior with a choice of cladding finishes. Low-maintenance construction built to last 30+ years.
How It Works
From first call to move-in, the Studio annexe takes approximately 10 to 12 weeks.
Week 1-2
Site Visit & Quote
We visit your garden, discuss what you need, and give you a fixed-price quote.
Week 3-4
Design & Order
Finalise the spec, sign off the design, and manufacturing begins.
Week 5-8
Manufacturing
Your annexe is built in our workshop.
Week 9-10
Site Preparation
Groundworks and foundations prepared while we finish manufacturing.
Week 10-12
Installation
Annexe delivered, assembled, connected, and handed over.
Technical Specifications
| External Dimensions | Approx. 6.1m × 6.1m (20ft × 20ft) |
| Internal Floor Area | Approx. 37 sqm (400 sq ft) |
| Internal Height | 2.4m (7ft 10in) |
| Wall Insulation | WarmWall 250mm system (U-value 0.15 W/m²K) |
| Floor Insulation | 150mm insulation (U-value 0.18 W/m²K) |
| Roof Insulation | 200mm insulation (U-value 0.16 W/m²K) |
| Windows & Doors | uPVC double-glazed (U-value 1.4 W/m²K) |
| Compliance | Caravan Act 1968 compliant (BS 3632) |
| Planning Permission | Not typically required (we'll guide you) |
| VAT | Zero rated (0%) |
| Guarantee | 10-year structural warranty |
| Life Expectancy | 30+ years with minimal maintenance |
Frequently Asked Questions
Common questions about the Studio annexe. Can't find your answer?Our team is here to help.
"Dad loves his new place, we love having him close by. One year on it's literally paid for itself compared to care home fees, and is probably the best family investment we've ever made."
Verified Google Review, Kent
Flexible Payment Options
A granny annexe is a significant purchase. Here are the most common ways our customers pay for theirs.
Equity Release
Use equity in your property with no monthly repayments
Remortgage
Add to your existing mortgage
Family Contribution
Split the cost between family members
Savings or Inheritance
Pay outright from savings
Example Monthly Payment
Studio Annexe
£750/month
Over 10 years (120 months)
Representative example only. Actual rates and terms may vary based on your circumstances. We can discuss finance options during your free consultation.
Explore Our Annexe Range
Not sure which size is right? All three use the same build quality and WarmWall insulation.
Studio
From £90,000
From £750/month
400 sq ft • Open Plan
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Two Bedroom
From £130,000
From £1,083/month
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Get a Free Quote
Book a free, no-obligation site visit. We'll look at your garden, talk through your requirements, and give you a fixed price for the Studio annexe.
Speak to our team
01689 818400Or email us at info@grannexe.co.uk