LONDON'S TRUSTED CONSTRUCTION COMPANY
Construction Services in
London
From concept to completion, we deliver high-quality construction solutions with integrity, precision and care. Loft conversions, extensions, basements, refurbishments & landscaping across Greater London.
WHAT WE DO
Construction Services Across Greater London
From loft conversions in North London to basement conversions in South London — Harris Construction delivers quality craftsmanship across every borough.
Loft Conversions
Maximise your living space and add value to your home. We design and build stunning loft conversions tailored to your property, from Velux and dormer to hip-to-gable and mansard conversions across London.
Learn moreHome Extensions
Extend your home with a beautifully designed single or double storey extension. More space, more comfort — our team handles everything from planning to completion, adding real value to your London property.
Learn moreBasement Conversions
Turn unused space into something extraordinary. We convert basements into luxury living areas, home cinemas, gyms and extra bedrooms — unlocking hidden potential beneath your London home.
Learn moreFull Refurbishments
Breathe new life into your property with a complete refurbishment. From structural alterations and rewiring to plastering, plumbing and decoration — we deliver full house renovations to the highest standard.
Learn moreLandscaping
Beautiful outdoor spaces designed and built to complement your home. From patios, decking and garden walls to driveways and outdoor kitchens — we create stunning landscapes across Greater London.
Learn more
CLIENT SATISFACTION
ABOUT HARRIS CONSTRUCTION
Your Vision. Our Expertise. Exceptional Results.
Harris Construction Ltd is a London-based construction company revolutionising building services with innovative solutions. From HVAC to lighting, from loft conversions to full property refurbishments — we enhance your spaces for maximum comfort and efficiency.
We take pride in every project, treating each home as if it were our own. Our experienced team of builders, roofers and tradesmen work diligently to deliver results that exceed expectations — on time and on budget. From the initial design consultation through to the final finishing touches, you're in safe hands with Harris Construction.
Serving homeowners across Greater London, we specialise in transforming properties through expertly delivered loft conversions, home extensions, basement conversions, full refurbishments and landscaping. Quality work. Trusted service. Built to last.
Years of combined experience across London's boroughs
OUR COMMITMENT
Why Choose Harris Construction
Fully Accredited & Certified
All our tradesmen are qualified and certified. We comply with all UK building regulations and maintain the highest standards on every project.
Fully Insured
Full public liability insurance cover, giving you complete peace of mind. Every job is covered, every worker is protected — no shortcuts on safety.
On Time, On Budget
We respect your time and your money. Our projects are delivered on schedule with transparent pricing — no hidden costs, no delays, no excuses.
Bespoke Design & Build
Every project is unique. We provide tailored design solutions that match your vision, your property and your budget — from initial concept to final handover.
PEACE OF MIND
Guarantees You Can Build On
We stand behind every project with guarantees, insurance and transparent pricing — so you can build with confidence.
Workmanship Guarantee
Up to 10 years on structural works for total peace of mind.
Fixed-Price Quotes
Transparent, no-obligation pricing with no hidden costs.
Fully Insured
Comprehensive Public Liability cover on every project.
Clear Contracts
Stage payments tied to milestones — you always know where you stand.
OUR WORK
Recent Projects Across London
From roofing and structural work to complete interior builds — see the quality and craftsmanship that goes into every Harris Construction project.
Roof Tiling
Steel Structure
Structural Beams
Roof Framing
Slate Cladding
Interior Build
Timber Framing
Dormer Loft Conversion
Completed Loft Room
Loft Roof Tiling
Skylight Installation
Structural Steelwork
Loft Timber Framing
Plasterboard & Velux
Flat Roof Waterproofing
Loft Conversion Framing
Extension Framework
Loft Boarding & First Fix
Loft Conversion Boarding
Stone Feature Wall & Niches
Completed Loft Room
Glass Balustrade Staircase
Media Wall Unit
Luxury Bathroom Fit-Out
Renovated Hallway
Loft Stairwell
Finished Loft with LED Lighting
Custom Built Wardrobe
Primary Bedroom Fit-Out
Marble Feature Hallway
Modern Bathroom with Whirlpool Bath
LED Feature Ceiling
Black Marble Feature Wall
Rear Extension & Patio
TESTIMONIALS
What Our Clients Say
"Harris Construction did an incredible loft conversion on our Victorian terrace. The team was professional from start to finish — clean, punctual and the workmanship was outstanding. Couldn't recommend them enough!"
Sarah T.
Enfield, London
"We had a full rear extension and the quality of work was exceptional. They kept us updated throughout the entire build and finished on schedule. The best builders we've ever used in London."
James W.
Barnet, London
"Fantastic basement conversion — turned a dark, damp cellar into a beautiful living space. The attention to detail was second to none. Harris Construction really knows what they're doing."
Maria K.
Islington, London
"Professional, reliable and excellent craftsmanship. Our complete house refurbishment was handled brilliantly. From the new roof to the landscaping — everything was perfect. Highly recommend."
David R.
Hackney, London
"Harris Construction transformed our garden into something magical. The landscaping team was creative, hardworking and delivered exactly what we envisioned. Will definitely use again."
Lisa M.
Tottenham, London
GOT QUESTIONS?
Frequently Asked Questions
We cover all of Greater London and surrounding areas. Our team regularly works across North, South, East, West and Central London, including Enfield, Barnet, Islington, Hackney, Tottenham and every borough in between.
Start times depend on our current schedule and the scope of your project. Once we've completed a quote and you're ready to proceed, we'll give you a clear start date — typically within 2–4 weeks for most projects.
Many loft conversions fall under Permitted Development and don't require full planning permission. However, this depends on your property type, location and the extent of the work. We'll advise you during the initial consultation and handle all necessary applications.
Yes. Harris Construction carries full public liability insurance. Every job is fully covered and every worker is protected — safety is never compromised on any of our sites.
Absolutely. We provide free, no-obligation quotes for all projects. Simply call us or send your details via the contact form and we'll get straight back to you to arrange a convenient time.
We specialise in loft conversions, home extensions, basement conversions, full refurbishments and landscaping. We also handle roofing, structural work, plumbing, electrics and complete design-and-build packages.
A standard loft conversion takes between 6–8 weeks from start to finish, depending on the complexity and type (Velux, dormer, hip-to-gable or mansard). We'll give you a clear timeline before work begins.
GET IN TOUCH
Ready to Start Your Project?
Call us now for a free, no-obligation quote or send your details and we'll get straight back to you. We cover all of Greater London.
Get Your Free Quote Today
Call us now or send your details and we'll get straight back to you via WhatsApp.
QUALITY WORK • TRUSTED SERVICE • COVERING GREATER LONDON