Business Details
19 Years
experience
Your Trusted Home Builders in Stevenage & Hertfordshire
Conserv-a-tech is a family-run home improvement company based in Stevenage, Hertfordshire, established in 2007. With over 17 years of experience, we specialise in designing and installing conservatories, orangeries, house extensions, and energy-efficient double glazing solutions across Hertfordshire and Bedfordshire. Our team of MTC-qualified installers and Which? Trusted Trader-certified professionals prioritise customer satisfaction through tailored designs, industry-leading products, and seamless project management from initial consultation to completion. We hold FENSA certification for compliance and quality assurance in all installations. Our dedicated sales designers work closely with clients to create functional, aesthetically pleasing living spaces using premium materials from trusted suppliers like Ultraframe.We manage every stage of the build process in-house, including internal dcor and external landscaping, ensuring cost-effectiveness without compromising on quality. Our commitment to transparency, competitive pricing, and post-installation support has earned us recognition as a GGP Installer Award winner for Best Glazed Extension. We partner with The Specialist Blind Co. Ltd to offer integrated shading solutions, enhancing the functionality of our conservatories and windows. Our mission remains rooted in Eric Knappetts founding principle: placing customer needs first through professionalism, expertise, and value for money.
Services
Conservatories
Orangeries
House Extensions
Double Glazing
Windows & Doors
Details
- Year established: 2007
Highlights and features
- We have over 17 years of experience in bespoke home extensions and conservatories.
- Our team are MTC-qualified and Which? Trusted Trader-certified installers.
- We hold FENSA certification for compliance and quality assurance.
- We manage all project stages in-house, ensuring cost-effectiveness and quality control.
- We won the 2025 GGP Installer Award for Best Glazed Extension.
Associations and certifications
- FENSA
- Which? Trusted Trader
What people say
Professional installations
Competitive pricing
Attentive customer service
Services
Conservatories
We design and install bespoke conservatories using Ultraframe systems, ensuring energy efficiency and durability. Our solutions include Georgian, Lean-To, and Edwardian styles, tailored to complement your propertys architecture. Each project includes expert surveying, FENSA-compliant installation, and a 10-year guarantee.
House Extensions
Our solid roof and tiled roof extensions provide functional living spaces with thermal efficiency. We handle all aspects from foundations to finishing touches, using market-leading materials. Projects are managed in-house, ensuring seamless integration with existing structures and compliance with building regulations.
Double Glazing
We supply and install uPVC and aluminium double glazing with A-rated energy efficiency. Options include Residence Collection windows, bi-fold doors, and composite doors, enhancing security and insulation. All installations meet FENSA standards and come with a comprehensive guarantee.
Conservatory Roofs
Upgrade your conservatory with Livinroof, Ultraroof, or Ultrasky systems for improved thermal performance. Our replacement roofs reduce glare and heat loss while maintaining natural light. The process includes removing old roofs, structural adjustments, and weatherproof fitting.
Integrated Blinds
Partnering with The Specialist Blind Co. Ltd, we offer made-to-measure blinds for windows, doors, and conservatories. Options include lantern roof and bi-fold door blinds with smart home integration. Blinds are precision-engineered in the UK for seamless operation and durability.
People
Eric Knappett
Owner & Managing Director
With decades of experience in conservatory construction, Eric founded Conserv-a-tech in 2007. He oversees all projects, ensuring adherence to quality standards and customer-centric service. His leadership focuses on innovation and long-term client relationships.
Kim Holloway
Accounts & Administration
Kim has managed finance and operations since 2007, ensuring smooth project workflows. She handles client onboarding, invoicing, and guarantee documentation, combining accounting expertise with organisational efficiency to support the team.
Allan Wilding
Sales Designer
Allan brings 30 years of design expertise to client projects, guiding them through material and layout choices. His focus on creativity and practicality ensures spaces meet both aesthetic and functional needs, tailored to individual lifestyles.
Questions
What areas do you serve?
We cover Stevenage, Hertfordshire, Bedfordshire, and surrounding areas including Letchworth, St Albans, and Cambridge.
Are your installations FENSA-certified?
Yes, all our window and door installations comply with FENSA standards for quality and building regulations.
Do you offer financing options?
Yes, we provide flexible finance plans to help you afford your home improvement project.
What conservatory styles are available?
We offer Georgian, Lean-To, Edwardian, and bespoke designs to suit traditional and modern properties.
Can I get a free quote?
Yes, use our online quoting tool or contact us directly for a tailored price estimate.
Do you install integrated blinds?
Yes, we partner with The Specialist Blind Co. Ltd to offer custom blinds for windows and conservatories.
Reviews (11)
Brendan
Apr 20, 2021
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We had our glass conservatory roof replaced with a livinroof which now means we can use the room all year round. The service was exceptional from quote to the finished installation. All workmen were polite and tidy using quality materials. The after service and communication has been very good and we would not hesitate to recommend this company.
David
Sep 12, 2020
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We chose this company as they were one of only a handful in our area who were able to fit the conservatory roof we wanted. In addition they replaced the windows. Aside from some delays in starting the work which we accepted were outside their control everything went very smoothly. The fitters turned up when they were expected, were polite and tidy and worked to a high standard. The one issue that arose was dealt with efficiently and without fuss.
Greg B.
Nov 05, 2018
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We had a replacement conservatory roof provided by Conserv-A-tech. We liked the companys approach from the minute they arrived to quote for the job. Clear discussions and not hard sell. Once we placed the order we were kept informed on progress towards a fitting date. On the day the work started they protected the rest of the conservatory and kept the place tidy. The team was courteous and always on time. The workmanship is excellent and the new roof has transformed our conservatory. I would read more
Jude M.
May 16, 2018
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Professional and friendly. Costing clear. Tidy, punctual and were very happy with final product. Would definitely recommend.
Krishna
Jan 15, 2018
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Despite having to rearrange the job twice, the service on the 2 days was top notch. Very professional and I highly recommend Conserv-a-tech. The guys who were fitting the conservatory roof were very polite and kept the inside of the house tidy, covering the flooring and necessary other elements, as I was quite worried the rain was going to cause issues. A job well done indeed!
Derek A.
Sep 22, 2017
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I chose Conserv-a-Tech partly as a result of the positive reviews they had received. I was not disappointed! From start to finish the company and in particular the lads who fitted my windows and doors were extremely professional, polite and helpful. They treated my house and property with respect, making as little mess as possible and always cleaning up thoroughly at the end of each days work. I was entirely satisfied with the quality of the product and the workmanship with which they were fitted. This is a company I would whole-heartedly recommend to anyone seeking a good professional company to undertake work in their home.
Robert
Jun 05, 2017
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I have no hesitation in recommending this company. They were fast and very efficient, very reliable workmen and very friendly. We are very pleased with our finished conservatory.
Sandra
Mar 16, 2017
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After a previous, stressful experience with another double-glazing company, it was a pleasure to deal with Conservatech. The work ethic, customer service and product were all very professional and second to none in my opinion. The pricing was very reasonable too. A friend of mine who saw these boys work has vowed only to use this company when he looks to replace his glazing. I can't praise them enough - they have my full recommendation.
Alan
Jan 13, 2017
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Conservatory refurbishment. Second time I have used this company, excellent results both times. Reliability, tidiness and courtesy all first class. Quality workmanship from a quality company.
Dave M.
Dec 13, 2016
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The advice given to me by Eric Knappett, the owner of 'Conservatech' on the type and design of my new composite doors was professional and knowledgeable. The price to supply and fit the new 'Rock Doors' was very competitive. Eric visited my home during the fitting to check on progress and accuracy. The two fitters, 'Leon' and 'Jack' were both very professional, polite and friendly. They arrived on time; the fitting and 'finishing' was done to an exceptionally high standard; they cleaned and hoovered their work areas thoroughly on completion of the work. I was very impressed with this company and would highly recommend them.
Justin M.
Oct 18, 2016
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Great company from the start, right through to the very final day of our conservatory. The whole team are very professional, polite and quality of work is second to none. The job was completed on budget which was a very competitive price
