Trusted by 500+ London homeowners

Transform Your
Home Today

Specialist builders in garage conversions, house extensions, and loft conversions across London. Add value and space to your property.

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10 Year Guarantee

Fixed Price Promise

Local London Builders

"Exceptional work on our loft conversion. Professional team, on time and on budget."

Sarah M. • Clapham

Our Services

What We Do

Specialist construction services to maximize your property potential across London.

Garage Conversions

Transform your unused garage into valuable living space. Perfect for home offices, gyms, or extra bedrooms.

Planning permission rarely required
Add up to 20% property value
Completed in 4-6 weeks

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House Extensions

Single and double-storey extensions to create the space your family needs. Rear, side, and wrap-around options.

Kitchen & dining expansions
Open-plan living spaces
Bi-fold & sliding doors

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Loft Conversions

Unlock the potential of your roof space. Dormer, hip-to-gable, and mansard conversions tailored to your home.

Extra bedroom & bathroom
Velux & dormer windows
25-30% value increase

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Why FIXIZ?

London's Trusted Building Specialists

With over 18 years experience and 200+ completed projects, we understand London properties and planning regulations inside out.

Fully Insured & Accredited

FMB registered, TrustMark approved, and £10m public liability insurance for your peace of mind.

On Time, Every Time

96% of our projects finish on or ahead of schedule. We respect your time and your home.

Fixed Price Guarantee

No hidden costs. The price we quote is the price you pay, guaranteed in writing.

How It Works

Our Simple Process

From initial consultation to final handover, we make your project stress-free.

Free Consultation

We visit your property, discuss your needs, and provide expert advice on the best options.

Design & Quote

Detailed plans and a fixed-price quote. No hidden costs, no surprises.

Construction

Our skilled team builds your project with minimal disruption to your daily life.

Completion

Final inspection, building control sign-off, and your 10-year guarantee.

Portfolio

Recent Projects

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Dulwich, SE22

Dormer Loft Conversion

3 bedroom loft with en-suite

Clapham, SW4

Kitchen Extension

Open-plan living space

Wimbledon, SW19

Garage Conversion

Home office & gym

Testimonials

What Our Clients Say

★★★★★

"FIXIZ converted our garage into a beautiful home office. The team was professional, tidy, and finished ahead of schedule. Highly recommend!"

James Davidson

Richmond, TW9

★★★★★

"Our loft conversion is amazing. The dormer gives us so much space and the Velux windows flood the room with light. Great value for money."

Sarah Mitchell

Clapham, SW4

★★★★★

"Brilliant work on our kitchen extension. The bi-fold doors open up the whole back of the house. Fixed price meant no stress about budget."

Ahmed Khan

Wembley, HA9

Get In Touch

Start Your Project Today

Ready to transform your home? Contact us for a free, no-obligation consultation and quote.

Call Us

020 1234 5678

Email Us

info@fixiz.co.uk

Working Hours

Mon-Fri: 8am-6pm

Transform Your
Home Today