Some of our top rated builders in Harrow, Greater London
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ONE COMPANY. ONE PROCESS. ONE POINT OF RESPONSIBILITY. Hi, I'm George Sora, Certified Passive House Designer and founder of RetrofitIQ powered by G.A.S General Building Services Ltd. My approach is different from traditional builders because every recommendation and every upgrade is based on proven Passive House Principles and building physics, not guesswork. Whether the problem is condensation, mould, damp, heat loss, air leakage, poor ventilation, uncomfortable rooms or excessive noise, I follow a structured process designed to identify and solve the root cause: INVESTIGATE → DIAGNOSE → DESIGN → REMEDIATE → VERIFY Using professional equipment including thermal imaging cameras, moisture meters, blower door airtightness testing, smoke tracing and ventilation assessments, I can identify hidden defects that are often missed during standard inspections. As a Certified Passive House Designer, I apply the five key Passive House Principles wherever appropriate: • Airtightness • High Performance Insulation • Thermal Bridge Reduction • High Performance Windows & Doors • Controlled Ventilation This allows me to deliver solutions that are not only visually finished to a high standard, but also healthier, more comfortable, more energy efficient and built to perform long term. Services include: • Thermal Imaging Surveys • Blower Door Airtightness Testing • Damp, Moisture & Condensation Investigations • Ventilation & Indoor Air Quality Assessments • Soundproofing & Acoustic Improvements • Internal Wall Insulation • Loft, Floor & Roof Insulation Upgrades • Air Leakage Reduction • Retrofit & Energy Efficiency Improvements • Refurbishment & Building Works From diagnosis through to completion, clients deal with one company and one accountable team. No guesswork. No unnecessary treatments. Measured. Diagnosed. Designed. Remediated. Verified.
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We have 15 years of building work experience. We are a professional construction company providing complete building solutions across residential, commercial, and industrial sectors. Our services include new builds, extensions, renovations, and property maintenance. With a skilled team, quality materials, and a focus on timely project completion, we ensure reliable and affordable construction services you can trust.
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Hi, I run a building company which takes on a diverse range of projects -from minor alterations to full refurbishments. Originally an electrician I have spent many years developing properties to maximise their potential. We offer a reliable and flexible range of services covering Hertfordshire and surrounding areas.
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We are general builders with 11 years experience. We are happy to undertake projects of all sizes.
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We are a loft conversion specialist company with over 20 years experience based in Hadley Green High Barnet. We pride ourselves on the quality of our work and making sure the work is carried out in accordance with building regulations. In addition to loft conversions we also carry out first and second fix carpentry jobs including installation of new staircases, handrail & spindles, new doors, door linings, fencing, decking, flooring and other related jobs.
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We have a committed team working on a range of different projects throughout London, working in all sectors including; residential, commercial and conservation. The services that we provide are, architectural and structural 2d & 3d designs, calculation, planning permission, building control, new build, refurbishment, self contained flats, loft conversion, rear and side extension plus much more. I have over 30 years of experience in construction and have worked on a variety of different projects, from small developments to managing large scale Projects.
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Nesimi construction ltd With over 18 years of experience, we specialise in bricklaying, driveways, and paving. We carry out all types of work including garden walls, patios, extensions, repairs, and general building. We pride ourselves on high-quality workmanship, reliability, and attention to detail. All jobs are completed to a high standard, on time, and at competitive prices. Friendly, honest, and professional service from start to finish.
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At Kapeti Ltd we create well planned interior architecture and interior design projects. We offer turnkey solutions in residential and commercial spaces for improving our client's life style in London, across the UK and international.
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From industrial and domestic General construction, electricity systems, heating to plumbing systems, air conditioning installation and servicing to domestic plumbing, heating issues, Fresh and Pure Air LTD specialise in all commercial, retail and domestic, general construction, electricity, plumbing, heating, air conditioning and services. We operate throughout the UK working in sectors ranging from: Schools, Nursing Homes, Office Blocks, Banks, Factory’s, Warehouses, Shops, Domestic Homes
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Fantastic friendly reliable service run by Johnny and his small team providing free quotes and competitive prices for all aspects of plumbing and drainage works
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At LASTING LTD, we specialise in high-quality residential construction and full property renovations across London and the surrounding areas. With years of experience and a strong reputation for reliability, we deliver projects with exceptional craftsmanship, clear communication, and attention to every detail. Our services include complete home refurbishments, loft conversions, kitchen and bathroom installations, structural works, flooring, plumbing, heating and electrical upgrades, and all types of internal finishing. Whether it’s a single room or a full house renovation, we provide honest advice, transparent pricing, and results built to last. We take pride in working cleanly, safely, and efficiently, ensuring every project is completed to the highest standards. Most of our clients come back to us again and again — because they trust our workmanship and appreciate our professional approach. If you’re looking for a reliable contractor who delivers quality without compromise, LASTING LTD is here to help bring your project to life.
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PCX Construction , based in London, is your trusted partner for all construction and renovation needs. We not only handle the fitting and construction work, but also provide a wide range of high-quality materials including tiles, carpets, kitchens, laminate, vinyl, and other building materials. Whether you're purchasing materials from us or want us to manage both the supply and installation, we've got you covered. Contact us today or send a WhatsApp message for bookings and quotes. Let us bring your vision to life with the best service at the best prices.
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We provide all types of home renovations from decorating, flooring to an extension we undertake HMO conversions and have now got a good team specialising in bathroom renovations and wet room panelling
