The quick way to find a local Single / Double Glazing specialist in Welwyn

Costa Boyer Ltd.

Single / Double Glazing

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Costa Boyer Ltd provides specialist for complete building solutions: house extension/ loft conversion/ replacement windows/ doors/ shops front/ home improvements/ kitchen/ tanking slurry solutions/ garage conversion/ porch/ canopy/conservatory / garden shed/ wooden decking/ parquet/ painted house/ Venetian stucco/ water leak/ 30 years experience building site/ all team have CSCS card/ NVQ Level 2/ NVQ Level 3 supervision/ GQA Qualification Ltd Certificate of achievement in theory of SCHUCO/ GQA Qualification Ltd Certificate of achievement in SCHUCO Curtain Wall/ GQA Level 3 Certificate in glass related operation/ GQA Level 3 NVQ Diploma in Fenestration Installation/ IOSH Working safely a course approved and validated by the Institution of Occupational Safety and Health/ Gold card Constructions Qualifications CSCS / Quality Management & Control accreditation by Mace Business School Limited/ Level 6 NVQ/ SMSTS and new one... Covid-19 Essential: Infection Prevention and PPE

Latest homeowner review

Reviewed by Gareth on 30/6/2021

Costa was excellent. Very friendly, efficient and carried out the work to to a high standard in the agreed timeframe and at the agreed price, despite some unexpected problems along the way. Would happily recommend him.

CRYS ENGINEERING LTD

Single / Double Glazing

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.I have my tools for all jobs, I like to work very ordered and responsibility.thanks

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Reviewed by Iftikhar on 10/11/2014

Excellent and prompt service, and is cool and calm no matter how big the challenge.

ALEX AND SONS LANDSCAPING, BUILDING AND GARDENING SERVICES

Single / Double Glazing

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We are a reliable and successful company and we provide the quality and the qualification of the work and product which we are doing for you .Our motto is, my customer my boss. We coming for a long journey experience working of 20 years working experience in Spain,Italy, United kingdom and Romania of landscaping industry and inside and outside house design of isolation,consolidation, any work of tiles or painting. We coming with the real quote of the work we try to be in competition with the construction quotations and to make our clients to make our publicity for work and quotations

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Reviewed by Katia on 25/10/2025

Alex visited me for a quote. One member of his team came on the same day and did the front garden quickly and efficiently.

Highverge ltd

Single / Double Glazing

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Highverge Limited are a professionally run roofing business working throughout London and the south east. We are specialist in both domestic and commercial roofing.We can accommodate anything from a gutter leak to a complete overhaul. We do not except a deposit until work is fully completed to your satisfaction

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Reviewed by Mark on 4/12/2022

The Highverge team were prompt, polite and cracked on with the work. Any issues were quickly worked out, and I'm very happy with the work they did for us.

Prestiges Construction Ltd

Single / Double Glazing

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THE ONLY CHOICE FOR YOUR HOUSE!!! We work with homeowners and their partners to solve the unique challenges of managing house improvments.

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Reviewed by Robert on 5/5/2026

Turned up on time and got going immediately. Very polite and kept me informed throughout the build. Would 100% recommend this very hard working team. Huge thanks.

DCL Building Contracts

Single / Double Glazing

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Hi all , A bit about myself my names Scott I’m skilled in many departments in the construction industry , Speciality’s Qualified painter & decorator , I also have qualifications in damp works rising penetrative & mould issues , I also cover roofing issues , erect fences and cover a lot of carpentry work , I’m professional great communication as that’s paramount im punctual and never leave a customer unsatisfied , I would love to show case my skills at your home , 35 years experience in construction . Regards Scott

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Reviewed by Gaynor on 17/3/2026

JAC Sealants

Single / Double Glazing

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Professional sealant applicator (mastic man) Over 10 years experience Work completed to high standard

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Reviewed by Kaj on 27/8/2025

LM Double Glazing Repairs

Single / Double Glazing

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I have 16 years of experience working in double glazing industry. 6 years in manufacturing and last 10 years as service engineer. Cscs card and nvq level 2. Public liability insurance. Valid DBS check.

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Reviewed by Jackie on 23/1/2026

Very busy tradesman, did an excellent job of renewing one lock and repairing another for a very reasonable price., checking I was happy with the results as he went along. Highly recommended.

Romega Handyman

Single / Double Glazing

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Hi everyone I'm 20 years bathrooms specialist and also designer, ofcorse with landlords agreed all jobs I don't my job from A to Z with guarantee and insurance Thanks for contacting me and together agree for one good price George

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Reviewed by Sohail on 15/12/2021

What an amazing guy!, another 2 weeks and he would have become a member of our family!. You can set your clock with George, he was at our door an 8am on the dot every morning. He gave us so many different ideas which really helped us. His workmanship i, totally flawless. We know what quality looks like now. George is a loyal, honest and hardworking individual who will always be our first choice when getting work done.

Bloor Corporation LTD

Single / Double Glazing

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Bloor Corporation Limited – A Group of Specialist Construction Companies With over 25 years of experience across the construction sector, Bloor Corporation Limited is a group of specialist companies providing expert solutions for both commercial and domestic projects. Our divisions cover a comprehensive range of services, ensuring high-quality craftsmanship, innovation, and long-lasting results. With all in house operations we can control your project without dealing with multiple companies. Bloor Glazing Experts in bespoke glazing solutions, including heritage restoration, replacement units, structural glazing, curtain walling, and difficult-access installations. From small repairs to full system refurbishments, we deliver precision and durability. Bloor Roofing Specialists in roofing repairs, refurbishments, and new installations, covering flat and pitched roofs, leadwork, waterproofing, cladding, and full re-roofing projects. We ensure weatherproof and long-lasting solutions for all building types. Bloor Building & Maintenance Providing a full range of internal and external building services, including extensions, refurbishments, structural repairs, masonry, brickwork, plastering, rendering, and general maintenance. Our fully trained in-house teams ensure efficiency, safety, and top-tier craftsmanship. Bloor Landscaping & Groundworks Transforming outdoor spaces with hard and soft landscaping solutions, including paving, decking, garden design, retaining walls, fencing, excavation, drainage solutions, and groundwork services. We create functional and visually appealing landscapes tailored to each project. Bloor Sectional & Modular Buildings Designing and constructing modular and sectional buildings for various applications, including commercial, industrial, educational, and residential use. Our solutions offer flexibility, durability, and rapid installation times, minimizing disruption while maximizing efficiency. Bloor Civil Engineering & Structural Works Delivering specialist civil engineering and structural works, including foundation construction, reinforced concrete, steelwork, underpinning, demolition, and site preparation. We handle complex engineering challenges with precision and expertise. At Bloor Corporation Limited, we take pride in tackling even the most challenging projects with a commitment to excellence, innovation, and quality craftsmanship. Whatever your project requires, our specialist divisions have you covered.

J. Preston

Single / Double Glazing

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j preston builders is a well established company based in st albans covering herts,bucks and north London.specializing in home extensions garage conversions and,structural alteration work . all aspects of construction coverd .

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Reviewed by S on 10/7/2020

Job done very quickly. Mr Preston and his work force were excellent I have no complaints, cannot fault hum. Very pleasant and has good ideas, clean careful and friendly. I would recommend him to everyone.

AYG Construction Ltd

Single / Double Glazing

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I highly recommend AYG Construction , very good job quickly done very reasonable quote, thanks to Adrian for his hard work. Finished double storey extension on time and very helpful throughout.Excellent quality and price. Welcome back any time. Thank you!

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Reviewed by Mark on 20/1/2016

Adrian and his team met or exceeded my expectations, always willing to match my needs and finished the job on time and within budget.

The Noah

Single / Double Glazing

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Ben’s journey in construction started at an early age. He grew up on construction sites alongside his father, who had a long-standing background in construction and worked directly on government projects. This gave Ben an early understanding of construction that came from being around real projects, real trades and the realities of building. He later studied Architecture, developing a deeper understanding of design, structure and how buildings come together. During this time, his passion for timber and craftsmanship became particularly strong. He discovered that what interested him most was not only designing buildings, but actually creating them. Before establishing NOAH Construction, Ben also gained experience working for leading construction companies, where he was exposed to projects worth millions of pounds and was involved in works with values reaching approximately £10 million. This experience gave him an understanding of the organisation, standards and responsibility required on larger construction projects. NOAH Construction was then established as a way to build something of his own. In just three years, the company has progressed from delivering smaller projects to successfully undertaking works ranging from approximately £50,000 to £1 million in value. Today, Ben combines three important parts of his background: hands-on construction experience from an early age, architectural education, and experience working within larger-scale construction environments. His particular passion remains timber and craftsmanship, but his approach to construction goes beyond one material or trade. The goal is to understand the project as a whole, build it properly and deliver work that he can stand behind. For Ben, NOAH Construction is the result of years spent around construction, studying architecture, learning from larger contractors and ultimately turning that experience into his own business. Hi, I'm Ben !

BBC windows and doors

Single / Double Glazing

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Over 15 years experience specialising in Double glazing. We offer supply and fitting for upvc and aluminium windows, upvc and aluminium doors,composite doors, patio doors, by folding doors, and many more. All product and work guaranteed for 10 years. we offer a wealth of skill and knowledge bringing unrivalled expertise to our customers. For your peace of mind we have liability insurance which covers up to £2m

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Reviewed by charlie on 28/12/2024

Really pleased with Ibrahim's service. Price was fair, installation was easy and more than happy with the end product. Would recommend. 5 stars!

IMPRESS EUROPE LTD

Single / Double Glazing

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Impress Europe Ltd is a full service construction company offering comprehensive solutions for residential, commercial and industrial projects. From design and planning to building and finishing, we handle everything - including new builds, extensions, loft conversions, renovations, landscaping and custom projects. Our team of skilled professionals are committed to delivering quality, safety and excellence in every job. We pride ourselves on reliability, clear communication and building long lasting relationships with our clients. Choose Impress Europe for all your construction needs - one company, every solution.

Edgars Constructions Ltd

Single / Double Glazing

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Well established family run building company based in London,we have built a strong relationships with well known building societies across the London due to our quality and trustworthy service High quality levels of work in major building projects,we specialise in planning and design,project management and general building services

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Reviewed by Zuzie on 17/3/2026

TIMI DECS LTD

Single / Double Glazing

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TiMI Decs LTD is a small company with a 14-year experience in home improvement. - Painting and painting solutions - Carpentry and joinery - carpet and floor solutions "No job too big or too small"

Latest homeowner review

Reviewed by Toks on 2/2/2026

Timi was patient and professional. He visited twice on his time to measure and gather requirements. On the day of execution, he arrived promptly and worked seamlessly with no sipervision. He also sent constant progress status report since i was not in on the day. I will surely be calling on him again and will recommend him. PS. His fees is also affordable.

Idea View Technical Ltd

Single / Double Glazing

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Ideal View Technical Limited is a premier construction company with seven years of expertise in the industry. Specializing in extensions, loft conversions, and full refurbishments, we pride ourselves on delivering exceptional results tailored to our clients' vision. Our dedicated team of professionals ensures that every project is executed with precision, attention to detail, and a commitment to excellence, providing our clients with their ideal view of their dream space.