Some of our top rated extension builders in Harrow
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Founded in Twickenham by lifelong friends Alex and Steven, Constructum Contracts Ltd has been delivering high-quality construction and bespoke craftsmanship across Surrey and South West London since 2024. Our combined expertise spans building surveying, project management, general construction and high-end bespoke carpentry — giving clients the confidence of both technical knowledge and practical experience on every project. Steven began his career after earning a Diploma in Construction from Richmond College, working for a respected local builder specialising in loft conversions, extensions and residential renovations throughout the Richmond upon Thames area. While gaining hands-on site experience, he completed a BSc in Building Surveying at Nottingham Trent University. Following graduation, Steven worked for a multi-disciplinary building consultancy in London as a Building Surveyor, Contract Administrator and Project Manager. His portfolio ranged from residential apartment blocks to commercial properties, with particular expertise in the preservation and restoration of historic buildings in Central London. Most recently, he worked in Australia as a private Building Control Surveyor on new-build developments, before returning to the UK to bring his technical knowledge and project leadership back to clients in SW London and Surrey. Alex also began his studies at Richmond College, developing a strong trade foundation in carpentry. Coming from a family of plumbers and electricians, he was immersed in the construction industry from an early age. Over the years, he has refined his skills across multiple trades, including plumbing, electrical works, bespoke cabinetry and kitchen installations. With a particular focus on high-end bespoke carpentry, Alex has worked alongside some of Surrey’s leading cabinetry, wardrobe and kitchen installation companies. He now brings that craftsmanship and attention to detail to every Constructum project. At Constructum Contracts Ltd, we combine professional oversight with skilled workmanship. Whether you require building surveying services, structural alterations, extensions, renovations or bespoke carpentry, we pride ourselves on reliability, transparency and delivering exceptional results with the highest standards of workmanship. We look forward to seeing how we can assist with your project.
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We are a design and build company based in Isleworth. We are an experienced and disciplined team who have worked on many projects throughout London and surrounding areas for many years. Our company provide professional services to all aspects of building works which includes Loft Conversions, Extensions, Refurbishments & Home Improvements . Federation of Master Builders Trust Mark member
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Having been in the construction for about 20 years, I take on various jobs like extensions, rebuilds, patios, garden walls and all aspects of building works. Mainly aspects of brickwork and blockwork from the ground upwards.
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AMH Build Group Ltd is a professional residential & commercial construction company specialising in extensions, renovations, refurbishments, structural alterations and new builds. We work across Buckinghamshire, Hertfordshire and West London, delivering quality workmanship, clear communication and reliable project management from start to finish. From plans to completion, we build homes properly.
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We offer professional service for all your local building requirements. With our team of professionals no job is too small or too big to handle. From Small Brickwork jobs to large extension work, we can do it. Our team of professionals have years of experience and know-how to carry out all jobs to the highest quality without charging extortionate prices.We are a small friendly local Builders with over 20 years experience!
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XtraForce Limited are experienced building contractors and fully insured for the works we carry out. We are currently in the process of going through "The Federation of Master Builders" accreditation. We offer whole building packages ranging from extensions to new traditional house builds. We currently work as sub contractors to main contractors doing basement construction, basement conversions to reinforced concrete frames and structural alterations to existing homes to create larger spaces.
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I've been working in Buiding all my working life. I undertake full referbs and smaller jobs. My work is to the highest standard
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Newline Building Solutions Ltd has been trading for over 10 years. We undertake all works including bathroom renovations, extensions and loft conversions. We have very good references throughout Greater London, including Schools, Offices and Residential clients. We take all measures to deliver our projects on time and within budget. We have a long list of associates which allows us to deliver projects from design to completion.
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We are a reliable and friendly business and value ourselves for the quality workmanship we can give you. We are an N.I.C.E.I.C fully approved trained electrical company that covers all aspects of wiring from Domestic or commercial to industrial premises. We have 20 + years experience. We complete and oversee all aspects of building trades to complete various types of projects. We now also specialise in Photovoltaic Solar Installation & Electric Vehicle Chargers.
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bathroom fitting Painting and decorating Plastering Carpenter Flooring End of tenancy maintenance extensions .....
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A construction company based in NW London. No job is too big or small. From log conversion to maintenance £ everything in between. Loft conversion Decorating & paint Garden clearance & Landscape Repairs and maintenance Plumbing
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I am working in construction from 15 years . I have a good and experience team. I recently renovated the 3 bedroom house with a 6 meter back extension. I mostly do loft conversion, back extension, renovate the old house , back garage etc.
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We are a team with a lot of experience and we will help you make the best decision to reduce expenses and do a job well done.
