Turn Your Garage Into Usable Living Space — Starting from £695 + VAT

​

A detached garage conversion offers an incredible opportunity to create a standalone, functional space that enhances your lifestyle and increases your property's value. Whether you want a self-contained annexe, private home office, gym, or creative studio, converting a detached garage gives you flexibility without extending your main home.

​

At Draw Plans, we are expert architectural designers offering fixed-fee garage conversion plans starting from just £695 + VAT. We serve homeowners across London and the Home Counties, delivering compliant, professional drawings tailored to your space and ideas.

​

Why Convert a Detached Garage?

Detached garages are often underused, outdated or left as storage. With some clever planning and thoughtful design, they can become valuable, multi-purpose spaces that work for your household’s changing needs.

​

Benefits of Detached Garage Conversions:

• Adds separate usable space without impacting your main house

• Ideal for privacy: great for guests, teens, home offices, or rentals

• Increases property value and market appeal

• Offers flexibility to convert into gym, studio, or self-contained unit

• May provide opportunity for additional income (if rented)

​

Detached garages offer unique potential — especially when located in generous gardens or rear access plots.

​

Detached Garage Conversion Cost

The cost of converting a detached garage varies based on the size, layout, plumbing/electrical needs, and whether you're building a self-contained space.

​

• Here’s a general guide to help you plan your budget:

• Detached Garage Conversion TypeEstimated Cost (Excl. VAT)

• Basic insulated office or studio£10,000 – £15,000

• Detached garage gym or hobby space£12,000 – £18,000

• Guest room with en-suite£18,000 – £30,000

• Fully self-contained annexe or studio flat£25,000 – £50,000+

• Draw Plans design feeFrom £695 + VAT

​

Our garage conversion plans include all the necessary details to support approvals and help builders quote accurately — saving you time and money during construction.

​

What’s Included in Our Detached Garage Conversion Plans?

All our plans are tailored to your exact needs and include:

• Site visit and measured survey (if required)

• Existing and proposed floor plans and elevations

• Suggested internal layouts for maximum functionality

• Scaled drawings for builders and Building Control

• Compliance notes for insulation, fire safety, drainage and ventilation

• CAD and PDF files for easy use

​

We’ll also advise you on whether planning permission is needed — and if not, we’ll help you proceed under permitted development rights.

​

Detached Garage Conversion Layout & Floor Plan Tips

Designing the right layout for your detached garage is crucial to ensure comfort, functionality and compliance. Unlike attached garages, detached structures often need:

• New utility connections (electric, water, waste)

• Full insulation and weatherproofing

• Ventilation and fire safety features

​

Popular Detached Garage Conversion Ideas:

• Convert Detached Garage to Office: Create a peaceful workspace away from the main home with natural light, heating, and built-in storage.

• Self-Contained Studio: Include a kitchenette, bathroom and living/sleeping space for guests, grown-up children or Airbnb use.

• Detached Home Gym: Soundproofed, rubber flooring, mirrors, and power supply for treadmills, weights or bikes.

• Creative Studio or Workshop: Ideal for artists, musicians, or crafters needing peace and space.

​

How to Integrate a Detached Garage Better

Although the garage is separate, you want it to feel like a natural part of your home’s overall layout. Here are a few key tips:

​

1. Create a Defined Pathway

Whether it’s paving stones, decking or a lit gravel path, make sure the walk between the garage and house feels intentional.

​

2. Use Consistent Materials & Colours

Match cladding, roof tiles or window styles with your main home to create a cohesive look.

​

3. Optimise Natural Light

Add bi-fold or French doors, rooflights or wide windows to make the space bright and inviting.

​

4. Insulate Properly

Detached garages often lack insulation. High-performance walls, floor and ceiling insulation are essential for comfort and compliance.

​

5. Plan for Privacy

Use soundproofing and smart layout designs to keep the space quiet and independent from the main household.

​

Do I Need Planning Permission?

In many cases, converting a detached garage to a non-residential use (e.g., office, gym, studio) can be completed under permitted development, as long as the external structure is not significantly changed.

You will need planning permission if:

• You’re converting the garage to a separate dwelling

• The building is in a conservation area or AONB

• The garage is listed or near a listed building

• You plan to raise the roof or extend it

​

Building Regulations approval is always required, and our drawings are created to meet those standards, including insulation, structure, drainage and fire escape compliance.

​

Areas We Serve

We work with homeowners across:

• Greater London

• Surrey

• Kent

• Hertfordshire

• Essex

• Buckinghamshire

• Berkshire

​

What Our Clients Say

“Draw Plans helped us convert our old detached garage into a stunning home office and guest suite. Their layout suggestions and drawings were spot on.”
— Lucy B., Richmond

​

“We turned a tired detached garage into a recording studio with Draw Plans’ help. They knew exactly how to make the space practical and pass regulations.”
— David G., Croydon

​

“I wanted a gym away from the main house. Draw Plans delivered detailed, clear plans — and the builders said they were some of the best drawings they’d worked from.”
— Mo A., St Albans

​

Why Choose Draw Plans?

• Fixed-fee garage conversion plans from £695 + VAT

• Experienced team with 100s of successful conversions

• Clear, professional drawings accepted by Building Control

• Fast turnaround with personal, friendly service

• Expertise in detached and outbuilding conversions

• 5-star reviews across London and surrounding counties

​

Ready to Convert Your Detached Garage?

Turn your underused garage into a beautiful, functional space. Whether it's a studio, office or annexe, Draw Plans are here to make your vision a reality.

​

Request your free quote today — Fixed price detached garage conversion plans from £695 + VAT.