Builders in North London for homes that work harder
If your family has outgrown your home, moving is not the only answer. Kev Construct Ltd is a North London building company that helps you create the space your family needs without moving home. From general building and new builds to external wall insulation and rendering, we plan the work carefully, keep you informed and leave your home warmer, more comfortable and worth more - rated 9.67/10 across 50+ verified Checkatrade reviews.
Recent building projects in North London
One trusted team for the whole project
We are a full-service building company, so most projects can be handled by one trusted team rather than several trades pulling in different directions. We are a limited company (Company No. 12080875) based in Edgware, Checkatrade members since 2019 with a rating of 9.67 out of 10 from 50+ reviews, so you can see the quality of our work before you call. We cover Edgware, North London, Enfield, Barnet, Watford, Harrow and the wider Hertfordshire area, for both domestic and commercial projects.
Choosing a builder is really about trust. You deal with a small, settled team who know each other and know their trade. John runs the site day to day, Marian prepares your quote in plain language with no hidden fees, and Dan and Niko handle the build with neat, careful workmanship and a tidy site at the end of each day. We back our work with a £1,000 guarantee, we carry out insurance work, and as a Checkatrade member we have passed up to 12 vetting checks. Estimates are always free, so there is no cost and no pressure in finding out what your project would involve.
Building, insulation and rendering under one roof
Whatever the project, the promise is the same: clear advice, tidy work and a finish you are proud to show your neighbours. Because we cover so much under one roof, you avoid the stress of chasing several firms - John coordinates the trades so each stage happens in the right order and nothing falls through the gaps.
General building
Renovations and refurbishments, brickwork, groundwork and repairs, plus structural work such as openings, steel beams and load-bearing changes - signed off by building control.
New builds
Ground-up construction for homeowners and developers, working from your architect's drawings - from setting out and foundations through to structure, roof, first fix and final finishes.
External wall insulation
An insulating layer fixed to your walls and finished in fresh render. A warmer home, lower bills, a smarter look and added value - one of the services our customers rate us most highly for.
Protect & refreshRendering
Silicone, monocouche and traditional render to smooth over tired brickwork, seal your walls against the weather and lift your home's kerb appeal - on its own or over insulation.
A warm, weatherproof jacket for your home
External wall insulation, often shortened to EWI, is a system fixed to the outside of your walls. Insulation boards are secured to the brickwork, then covered with a reinforced base coat and a decorative render finish. In effect, your home gets a warm, weatherproof jacket that also gives the outside a clean, updated appearance. It suits solid-wall homes especially well, since these cannot take cavity wall insulation, and because the insulation goes on the outside you keep all of your internal room sizes with far less disruption inside.
EWI is one of those rare improvements that pays you back in several ways at once: a warmer home with fewer cold spots and draughts, lower energy bills, a smart new render finish, added value and kerb appeal, and better protection against wind and rain. Good EWI is all about careful preparation and neat detailing, and that is where our experience shows - we check the walls, deal with any repairs, fix the insulation boards securely around windows and doors, apply the reinforced base coat with mesh, then finish with your chosen render and colour.
External wall insulation & render, Watford
We completed the external insulation and render of a Victorian house in Watford - wrapping cold solid walls in a warm, weatherproof layer and finishing in a fresh, even render that the neighbours keep commenting on. Fast, tidy and finished on time, it was rated 10/10 by a verified Checkatrade customer in Watford, and EWI in Watford is the work our reviews single out most.
Silicone, monocouche and traditional render
Rendering is a coating applied to the outside walls of your home. It smooths over tired or mismatched brickwork, seals the surface against wind and rain, and gives the whole property a clean, updated appearance. The final coat over insulation is usually a through-coloured render, and silicone render is a popular choice because it is flexible and crack-resistant, sheds water and has self-cleaning properties that help it stay looking fresh with little maintenance.
Monocouche render is a coloured, one-coat cement-based system that gives a durable, attractive finish without the need for painting, while traditional sand and cement render is hard-wearing, well proven and usually painted after it cures. We will walk you through the options, colours and textures so the finish suits your home and your taste. Rendering pairs naturally with external wall insulation, so if your walls are cold as well as tired, it is well worth asking about doing both together for a warmer home and a fresh new look in one project.
A simple, predictable process.
You always know what happens next, who's on site, and exactly what it costs.
Free home visit
We visit, listen to what you want and look at what is realistic for your home and budget.
Clear written quote
Marian prepares a clear, itemised quote in plain language with no hidden fees.
Plan & approvals
We agree a start date, prepare any drawings or calcs and work with your architect or building control.
The build
John coordinates the trades so the job flows in order, while Dan and Niko keep the site tidy.
Final walk-round
We walk round with you to make sure everything is right before we call it finished.
What does EWI and rendering cost in North London?
As a guide, external wall insulation costs around £90-£150 per square metre, or roughly £8,000-£20,000 for a whole house, while house rendering runs around £45-£90 per square metre. These are guide figures for 2026, not fixed quotes - the real price depends on your walls, the render finish and access. Every project is confirmed in a free written estimate.
Guide ranges for North London, 2026 - not fixed quotes. We measure and quote every project individually and put the final figure in writing before any work begins.
What our customers say.
“John and the whole crew were a pleasure to work with. Fast, great communication, finished on time and to a high quality.”
“So happy with the result - neighbours keep commenting. Fast, high standard, friendly and always tidy. 5 stars!”
“Dan and Niko put real care into the work; Marian set everything out clearly with no hidden fees. They went above and beyond.”
Good to know.
Are you fully insured and does someone check your work?
Yes. We are a limited company and we carry insurance, and we also undertake insurance work for clients. As a Checkatrade member since 2019 we have passed up to 12 vetting checks, and our rating of 9.67 out of 10 from 50+ reviews is public so you can read genuine feedback before you decide.
Do you do both small jobs and large projects?
We do. We handle everything from repairs and single rooms through to extensions, conversions, new builds and commercial work. If you are not sure whether your job is worth a builder's time, call us and describe it. We will give you an honest view and a free estimate.
Will I get a clear price before work starts?
Yes. Marian prepares every quote in plain English with no hidden fees, so you know what is included and what it costs before anyone lifts a tool. If something unexpected comes up mid-project, such as a hidden defect, we talk to you first rather than adding costs quietly.
Which areas do you cover?
We cover Edgware, North London, Enfield, Barnet, Watford, Harrow and Hertfordshire. We take on both domestic and commercial projects. If you are just outside these areas, get in touch and we will let you know if we can help.
Ready to talk about
your project?
Tell us what you have in mind and we'll arrange a free visit. You'll get honest advice and a clear, written estimate - with no pressure and no hidden fees.
- Free home visit & survey
- Clear written estimate - no surprises
- Local Edgware team · rated 9.67/10 on Checkatrade
Prefer to talk? 07838 662 225