Endorsed by Which?

Conserv-a-tech

4.8

101 Reviews

Opening Hours
Today - –
  • Monday –
  • Tuesday –
  • Wednesday –
  • Thursday –
  • Friday –
  • Saturday - Closed
  • Sunday - Closed

What is a Which? Trusted Traders Hertfordshire Trading Standards Approved Endorsement?

Which? Trusted Traders has partnered with Hertfordshire Trading Standards to create a Hertfordshire Trading Standards Approved endorsement. In addition to our standard trading standards assessment, this trader has had a DBS check and is subject to a Trading Standards intelligence check

About

Owned & managed by its Director Eric Knappett, with the Sales & Design managed by Allan Wilding, both Eric & Allan have over 60 years of combined experience & a wealth of knowledge in this industry. Conserv-A-Tech is your market leader in glazed extensions, conservatories, orangeries, energy-rated windows, garage conversions, bi-folding doors in Stevenage. being Independently owned & a flourishing business,with an enviable reputation, Conserv-A-Tech offer's the highest quality products of the industry, much better project management, installation, and customer service,& all our staff are Employed.
Our customers are real people...not just a contract number!
As the leading choice for conservatories, Glazed Extensions, Windows & Doors based in Stevenage, we install throughout Hertfordshire, Bedfordshire, Cambridgeshire, Buckinghamshire.
Call Eric, Kim or Allan today, and start your journey with Conservatech.

What we do

  • Builders

    • Conservatories
    • Garage conversions
  • Double glazing

    • Double glazing installation
  • Doors

    • Bi-fold doors
    • Patio doors
  • More Services

    • orangeries
    • solid tiled roof glazed extensions
    • bi-fold door

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

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100% of the reviews we publish have been through our stringent moderation process.

4.8
101 reviews
Customer Service
4.8
Quality
4.9
Value
4.8
Sort by
My Review
Customer Service
Quality
Value
Brilliant job
Harry, Hertfordshire Posted on 13/09/2016 , work completed 13/09/2016
Excellent, friendly job
Customer Service
Quality
Value
Kept to time. Clean & tidy. Helpful at all times.
Jeffrey, Essex Posted on 06/09/2014 , work completed 06/09/2014
Superb service from beginning to end
Customer Service
Quality
Value
From the initial meeting with Tony and Eric I knew that this was a company I would be happy to deal with. Mark and Leon the fitting team were superb. They were punctual, polite and tidy. Their attitude and professionalism could not be faulted. The team have just finished the job and my wife and I are now sitting in our conservatory with a glass of wine admiring their work. Would not hesitate to recommend ConservaTech...thank you guys!
David S Posted on 03/07/2015 , work completed 03/07/2015
Completely satisfied with work.
Customer Service
Quality
Value
From start to finish job was done in professional way. Everything done was explained and left tidy after working day finished. End result was excellent.
Lesley, Hertfordshire Posted on 21/09/2016 , work completed 21/09/2016
Prompt and very professional
Customer Service
Quality
Value
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.
Robert, Hertfordshire Posted on 05/06/2017 , work completed 05/06/2017
Excellent Service
Customer Service
Quality
Value
Excellent Service, timely, professional and courteous.
Kathleen, Hertfordshire Posted on 08/05/2017 , work completed 08/05/2017
Excellent, friendly service
Customer Service
Quality
Value
Pleased with all aspects of work carried out from design to build of our conservatory. Highly recommended.
Customer in Hertfordshire Posted on 15/11/2018 , work completed 01/07/2018
Conservatory roof
Customer Service
Quality
Value
We were very happy and impressed with the work of the Conserv-a-tech. They replaced our conservatory roof that was leaking and also had a design problem. Eric redesigned the roof to make it technically much better and mor efficient. The whole team was extremely good, worked very well together and finished everything to our satisfaction.
Customer in Greater London Posted on 05/11/2019 , work completed 04/11/2019
Rear extension & landscaping - excellent workmanship.
Customer Service
Quality
Value
Excellent work and organisation from start to finish. All trades, the designer, ground workers, bricklayer, fitters, plumber, electrician, Landscaper etc. were very professional, hard working, polite and courteous. Very pleased with the end result!
Customer in Hertfordshire Posted on 08/11/2019 , work completed 01/07/2019
Conservatory transformation
Customer Service
Quality
Value
Can't recommend this company enough. We were so fed up of our old leaky, too cold, too hot conservatory - it was a room I absolutely hated to be in. It is now my favourite room in the house. It's beautiful. Everyone we dealt with at the company so helpful and despite some issues with planning everyone so supportive and helpful at every stage, from planning, costs, build etc... Delighted with the outcome.
Customer in Bedford Posted on 25/06/2020 , work completed 01/11/2019
Replacement Conservatory
Customer Service
Quality
Value
The project was delayed by the Pandemic, but this was not an issue. The salesman was very efficient and produced excellent plans. The site visit was very good, everything was explained in detail including free removal of the old conservatory including carpet. The installers were great and clearly a good team. I would recommend Conserv-a tech if asked.
Customer in Hertfordshire Posted on 14/09/2021 , work completed 10/08/2021
Replacing my old conservatory roof
Customer Service
Quality
Value
A brilliant service from start to finish, professional, helpful and a great job done by all involved.
Tim in Central Bedfordshire Posted on 29/04/2022 , work completed 29/04/2022
New Polycarbonate Roof
Customer Service
Quality
Value
Conserv-A-Tech stood out, as they were a local company. No high pressure sales from Martin Beech. Your money is registered with the Government Scheme, so both parties are protected. Eric Knappett, owner and Surveyor came and measured everything accurately, so that the order could be placed with Ultraframe. Kim in the office kept me updated. Phil, electrician made electrics safe. He found a few faults with my electrics and I had to contact my supplier to send an engineer to rectify. Leon and Ayyron, Installation Technicians were here for 3-days. Tidied as they went, so professional.
Customer in Hertfordshire Posted on 18/05/2022 , work completed 05/05/2022
Replacement of Old Polycarbonate Panel & Roof Structure with Climate-Controlled Glass
Customer Service
Quality
Value
An excellent job by Conservatech from the initial survey/quote to the finished result - it's like a whole new conservatory, and we're wondering why we put up with the old polycarb roof for so long! Great work by the fitters (Leon and Connor) - tidy, courteous, and hard-working in sometimes difficult weather. A couple of minor issues were sorted out quickly and efficiently by Eric and the team back at the office. We're absolutely delighted with the finished roof, and the 10-year guarantee that comes with it.
Customer in Hertfordshire Posted on 10/03/2021 , work completed 15/02/2021
Replace conservatory plastic roof with UltraFrame Warm roof.
Customer Service
Quality
Value
Excellent friendly service and excellent value for money compared to large National companies. Would certainly recommend them.
Customer in Central Bedfordshire Posted on 15/05/2021 , work completed 14/04/2021
Excellent - Highly recommended
Customer Service
Quality
Value
Excellent - all of the trades who carried out work were fantastic - courteous, tidy, and all did an exemplary job to a very high standard. Highly recommended.
Customer in Hertfordshire Posted on 17/10/2022 , work completed 15/10/2022
Super Happy Customer - Warm Roof Extension & More
Customer Service
Quality
Value
We wanted to share our experiences with Conserv-a-tech. This was a big investment for us but the process from beginning to end was friendly and professional at all times putting us at ease. The pre-planning and quote process was informative and the options were explained without any stress or pressure. Once the work was agreed and booked in we were kept informed as to what was happening and when. The build process involved both Conserv-a-tech people and other tradespeople, all were friendly and the work was completed professionally and with care and attention. The workspace was cleaned down and left in good order every day. We are absolutely blown away with how it all looks now it’s finished. It is all that we hoped for and so much more. We absolutely recommend Conserv-a-tech for any anyone thinking of an extension, garden room, patio etc..
Customer in Central Bedfordshire Posted on 13/04/2025 , work completed 01/04/2025
Outstanding service, real people who care, and a door that’s absolutely perfect!
Customer Service
Quality
Value
Outstanding service, real people who care, and a door that’s absolutely perfect! These days, most door installers expect you to use an online design tool — you create your own door, submit it, get a quote, and hope for the best six weeks later. I’m quite IT-savvy and like to be independent, but when it comes to something as important as a front door, I needed to be 100% sure I was getting exactly what I wanted, with proper advice from a professional who actually cares. I requested around seven quotes and did seven designs — yet with most companies I was only about 60% sure how the final door would look and function, which isn’t good enough for me. Only two installers were willing to visit in person, and Conservatech stood out immediately. Allan was incredibly thorough, walking me through every single detail — from style to security — and his knowledge and patience were so reassuring. After that visit, I knew Conservatech was the right choice. Eric, the owner, then came to do the final measurements himself, making sure everything would fit perfectly. And when installation day came, Leon and Stewart did a fantastic job — they were professional, kind, and efficient, fitting the door beautifully despite heavy snow and rain - all in record time! Price-wise, Conservatech are very competitive, but their level of customer service and care puts them miles ahead of the competition. I couldn’t recommend them more highly.
Customer in Hertfordshire Posted on 27/11/2025 , work completed 19/11/2025
Fantastic job.
Customer Service
Quality
Value
I would have no problem recommending Conservatech. The standard of work and customer service was above all expectations.
Karen, Hertfordshire Posted on 20/09/2014 , work completed 20/09/2014
Brilliant job
Customer Service
Quality
Value
I have no hesitation in recommending Conserv-A-Tech. I was most impressed with the work, very tidy and efficient. Friendly and polite. I'm thrilled with the finish.
Philippa, Hertfordshire Posted on 13/11/2014 , work completed 13/11/2014
Excellent job
Customer Service
Quality
Value
Excellent job carried out from start to finish in a very professional manner. Extremely tidy continuous, great work membership. If you need a new or refurbished conservatory you couldn't do better than use this company.
Clyde, Hertfordshire Posted on 13/10/2014 , work completed 13/10/2014
Two new 'Rock Door' composite doors fitted to replace my old front and back doors.
Customer Service
Quality
Value
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.
Dave M Posted on 13/12/2016 , work completed 13/12/2016
Highly recommended. Excellent work
Customer Service
Quality
Value
Friendly, polite employees. Punctual, tidy and worked efficiently. Would recommend them for their professional approach from initial contact to completion.
Pat, Hertfordshire Posted on 13/05/2016 , work completed 13/05/2016
Conserv-a-tech: A first class product and service
Customer Service
Quality
Value
We decided on Conserv-a-tech on the recommendation of our neighbours, who praised their professionalism and quality. We ordered a fairly expensive orangery/conservatory. It was a big outlay for us, so we wanted a guaranteed result. We have not been disappointed. The end result is beautiful and has enhanced our house immensely. The Conserv-a-tech team have all been so professional with no effort spared to ensure our satisfaction. I can recommend this company without reservation - something that I very rarely do.
Richard Posted on 27/09/2016 , work completed 27/09/2016
Excellent products and service
Customer Service
Quality
Value
Would highly recommend Conservatech. The products are of top quality and so is the service. We had our front door and windows replaced. The windows show no condensation, brilliant! Work was completed on time and the team was very courteous and tidy.
Marina, Hertfordshire Posted on 13/02/2017 , work completed 13/02/2017