If you’re looking for an affordable way to expand your living space without building outwards, a garage conversion might be the perfect solution. At Draw Plans, we specialise in creating detailed, regulation-ready garage conversion plans in London and the Home Counties from just £695 + VAT.

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In this article, we’ll break down the costs, show you how to make the most of your layout, and share expert advice on how to integrate your garage conversion seamlessly with the rest of your home. We’ll also touch on rear extensions, including rear extension ideas, costs, and planning considerations, for those considering a broader home improvement project.

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Why Convert Your Garage?

Garage conversions are one of the most cost-effective ways to add space and value to your home. Most garages are underused—often serving as storage for boxes, tools, or items you no longer need. By converting your garage, you can transform this underutilised space into:

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• A home office

• A guest bedroom

• A utility room

• A playroom

• A home gym

• An annex or self-contained flat

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How Much Does a Garage Conversion Cost?

The cost of a garage conversion varies based on the size of the space, existing structure, insulation needs, and the quality of finishes. Here's a general breakdown:

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Type of Garage ConversionEstimated Cost (Excl. VAT)

Basic Single Garage Conversion£6,000 – £12,000

Integral Garage Conversion£8,000 – £15,000

Double Garage Conversion£15,000 – £25,000+

Architectural Design Plans (Draw Plans) From £695 + VAT

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Tip: Always factor in planning, structural calculations, and Building Regulations approval. At Draw Plans, we provide detailed plans ready for submission to your local council or private building control.

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Creating the Best Layout for a Garage Conversion

Design is everything. A well-planned layout ensures that the new room feels like a natural part of your home rather than an afterthought. Here’s how to get it right:

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1. Define the Purpose

Start by determining what you want to use the space for. This will guide everything—from insulation to electrics to layout.

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2. Seamless Integration

Make sure the flooring, ceiling height, and finishes align with the rest of the house. Replace or insulate the garage door area properly, often by installing a wall and window in its place.

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3. Consider Natural Light

Garages tend to be dark. Consider installing skylights, new windows, or even French doors at the rear to bring in natural light.

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4. Insulate Properly

Proper insulation is key to making the space livable all year round. This includes floors, walls, and the roof (if detached).

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5. Plumbing & Electrics

If you’re adding a bathroom or kitchenette, plan plumbing and drainage routes early. Also consider underfloor heating or electric radiators if the main heating system doesn’t reach.

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Garage Conversion vs Rear Extensions

If you need even more space than a garage can provide, a rear extension might be worth considering. Many homeowners combine garage conversions with rear extensions for maximum space and flexibility.

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Rear Extension Ideas:

• Open-plan kitchen diners

• Indoor-outdoor living spaces

• Garden-facing lounge or sunroom

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Rear Extension Costs:

Extension TypeEstimated Cost Range

Single Storey Rear Extension£1,500 – £2,500 per m²

Double Storey Rear Extension£2,000 – £3,000 per m²

With Draw Plans, you can get rear extension plans and garage conversion plans tailored to your property, lifestyle, and budget.

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Planning Permission & Building Regulations

Most garage conversions fall under Permitted Development Rights, meaning you don’t need planning permission, especially if the work is internal and doesn't enlarge the building. However:

• If you’re converting a standalone garage into a separate dwelling, you will need planning approval.

• Building Regulations approval is always required.

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At Draw Plans, we handle all planning considerations and prepare plans that meet current regulations, ready for submission.

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Why Choose Draw Plans?

Garage Conversion Plans from £695 + VAT
pecialists in London & the Home Counties
Fast Turnaround & Fixed Fees
Regulation-Ready Plans
Clear Communication & Expert Advice

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Client Testimonials

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"Draw Plans were brilliant from start to finish. Our garage is now a beautiful guest room, and the plans were approved with no issues. Highly recommend!"
– Emily T., Harrow

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"I wanted to convert my double garage into a home office and gym. Draw Plans created fantastic designs and handled all the red tape for me. Great value for money."
– James L., Surrey

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"We used Draw Plans for both a garage conversion and a rear extension. Their design team gave us smart layout suggestions and made the process stress-free."
– Aisha M., Wandsworth

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Get Started Today

If you’re thinking about converting your garage or extending your home, Draw Plans is here to help. We offer transparent pricing, expert advice, and beautiful, practical designs.

Call us now or get a free quote online to begin your garage conversion journey.