Some of our top rated conversion specialists in Welwyn Garden City
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We are joiners by trade, passionate on what we do over the years. We have combined over 32 years of experience on carpentry/joinery itself. As there is always demand, we started delivering any type of construction work, full house refurbishment, kitchens, bathrooms etc. Always preserving our high quality of work, honesty, professionalism. Fully committed to anything we can come across, always find clients, architects solutions so we can achieve everyone’s dream, expectations.
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professional builder with 25 years of experience in renovations, refurbished, window and door installation, loft conversion, extensions, conservatories, kitchen installation
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We have been trading for a couple of years but I have been in the building trade for much longer. We are friendly and polite and we always aim for a 100% customer satisfaction. We give warranty to all work carried out. Several services that we offer are: - House renovation & Extensions - Specialised in external wall insolation and rendering - Loft conversions and built-in furniture - Guttering - Home improvement - Kitchens and Bathrooms - Painting and decorating
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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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Reliable and experienced builder specialising in extensions, renovations, brickwork and general building services. I deliver high quality workmanship with attention to details, clear communication and projects completed on time and within budget. No matter the size of the job, i work professionally and treat every property with care
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We have a long 15 years experience in general build .loft conversions.Extentions .roofing etc.no job is to big ,no job is to small for us
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We are a very experienced team of tradesmen offering all aspects of construction from new builds to refurbishment and extensions. We take on all sizes of jobs from a bathroom refurb or kitchen refurb all the way to multiple new builds. One thing we strive for is quality and customer relationship. We believe in using skilled tradesmen as that is what maintains a high quality of workmanship and leads to a happy client and high quality finished job.
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Ive got 15 years experience in all aspects of the building trade, we have a INTERIOR and EXTERIOR team who work closely with our clients to give them the unique spaces they desire.
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I've contract and worked for some of the top tier companies in the UK as well as abroad. My company covers a range of construction disciplines both external and internal. No project is too small or too big. Just completed the refurbishment to my wife's fitness club within a business centre in Hitchin completed to a high-end finish. Photos available upon request.
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Hi, I’m Sean Walsh, a skilled and reliable builder with years of hands-on experience. I specialise in new builds, extensions, renovations, roofing, carpentry, and general maintenance. I’m committed to quality, attention to detail, and delivering every project on time and on budget. No job is too big or small—I treat every home as if it were my own. Whether you’re planning a home extension, renovation, or maintenance project, I provide professional guidance and craftsmanship you can trust. Let’s make your vision a reality!
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I am your reliable local builder with 30 years experience in all aspects of building and property maintenance and can assist you with all your building needs. I am fully insured with cscs health and safety card. My skills include bricklaying, helibars, repointing, roofing, guttering, fencing, plastering, plumbing, tiling wall and floor, kitchen fitting, laminate flooring etc.
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Thornveil Developments Ltd is a reliable and professional construction company specialising in refurbishments, property improvements, and general building works across London. We take pride in delivering high-quality workmanship, attention to detail, and efficient project completion. From small jobs such as painting, flooring, and partitions to larger projects including renovations, garage conversions, and structural work, we handle every job with the same level of care and professionalism. We work closely with our clients to understand their needs and ensure the final result meets expectations. We offer competitive pricing, clear communication, and a dependable service from start to finish. Customer satisfaction is our priority, and we aim to build long-term relationships through trust and quality results. We understand how important timelines and budgets are, which is why we plan every stage carefully and keep our clients informed throughout the process. Our team is committed to maintaining clean, safe working environments and delivering results that add real value to your property.
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We pride ourselves on our honest approach and expertise, towards your project. We treat each home as if it was our own. Customer satisfaction is key, communication between contractor the the customer is the top of our list. Always there to offer advice on products and services. Offering Kitchen refurbishments Bathroom refurbishment Full house refurbishments Plumbing services Structural works Building services Plastering services Full decoration
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I have 18 years of experience in the building sectors commercial and domestic . I am fit, careful, thorough, hard-working and energetic, focused and have a good eye for detail. I am friendly and trustworthy and most importantly, passionate about the work.
