Double and Triple Glazed Windows In Southampton, Hampshire

Proud to provide the highest quality of triple and double glazing in Southampton at competitive prices. Test Valley Windows are a Which? Trusted Trader and award winning local company, putting your requirements first.

Our motto “Your Satisfaction is our Future” influences everything that we do – putting your requirements at the very centre of our work

Established in 1995, we’re pleased to have been awarded the Plastic Window Federation Certificate of Excellence every year since 1996. Providing Southampton with high-quality products at affordable prices, with an unrivalled level of customer service to match, our customers return again and again and readily recommend us to others.

Doors, Conservatories, Orangeries & Double Glazing Repairs in Hampshire

As well as providing exceptional windows, we also offer and install the most extensive range of double glazed uPVC and composite doors, conservatories, orangeries and double glazing repairs and replacement parts, all at affordable prices in Southampton.

Test Valley windows double glazing repairs cover Southampton, Winchester, Salisbury,Andover, Romsey, Newbury, Basingstoke, Whitchurch, Overton, and most of Hampshire.

We have carried out repairs and replacement parts to double glazed windows since 1995 and can replace your glass at a fraction of the cost of new windows.

Prioritising Your Peace of Mind with our Quality, Affordable Products

Thanks to our hard-earned respect, buying power and proactive investigations into new double glazed windows, triple glazed windows, doors, conservatories, and orangeries available, we can offer our customers in Southampton the highest quality products at the most competitive prices.

And what will this unique, second-to-none service cost you? Initially absolutely nothing! With our free design services, our friendly and professional representatives closely examine your requirements to compile a detailed quotation, free of charge, with no obligation, thanks to our no pressure sales policy.

We offer a 10-year installation and product guarantee across our entire range of windows, doors, conservatories and orangeries; insured by the Plastic Window Federation. Alongside this, we are so confident in the quality of our products; we also offer a further 10-year security guarantee.

FENSA Registered

We’re proud to be a FENSA Registered company. FENSA was established in response to new building regulations in England and Wales. Homeowners are required to comply with current thermal performance and building regulations relating to new and replacement windows, doors and roof lights. The work must be certificated by a company registered to a Competent Person Scheme such as FENSA or Local Building Control. After completing an installation, we issue a FENSA approved certificate to show that the work was carried out by a registered installer.

Below are a few examples of our doors, conservatories and double glazed windows that we offer in and around Southampton. Please visit our product pages and gallery for more information.


We are extremely proud of the quality of our products and installations, and we love to hear the positive feedback we get from our customers.

  • I am so pleased I chose Test Valley Windows to install my new conservatory, the quality of the finished installation is excellent. I will be recommending you to any friends and family who are looking for a top quality installation by a quality local company.
    Mr Farrer
    Picket Piece
  • Very pleased with excellent service and the result. Our new conservatory built on the foundations of our previous is a superb addition to our house.
    Mr & Mrs Smith
  • We spend hours in our fantastic new conservatory; we wouldn't hesitate to recommend Test Valley Windows.
    Mr & Mrs Lawrence
  • We are so pleased with our new conservatory; we always sit in it when entertaining our many friends and family. We would highly recommend Test Valley Windows
    Mrs Gibbons
  • We couldn't be happier with our new conservatory; we use it more than any other room in our home. Everyone comments on how nice it looks, and we always say how happy we are with the service Test Valley Windows provided.
    Mrs & Mrs Kemish
  • Having visited Test Valley Windows' showroom and see their range of products, I chose a combination of black and white uPVC windows to compliment my period property. I am delighted with the finished installation, everyone was very professional and took pride in the job they were doing. I wouldn't hesitate to recommend Test Valley Windows to my friends and family.
    Mr Blackmore
  • We are very pleased with our new porch from Test Valley Windows, the building work has been admired by our neighbours, and the fitter was extremely good in his manner and took pride in his work
    Mr & Mrs Morgan
  • With such a professional approach and a first class finish, I wouldn't hesitate to recommend Test Valley Windows.
    Mr Lurcas
  • I would like to thank Test Valley Windows for such a wonderful conservatory; it has added a wonderful extra room to our home. From the start, everyone was courteous and helpful, and nothing seemed too much trouble. I would only be too happy to recommend Test Valley Windows to anybody interested in a conservatory or replacement windows and doors.
    Mr & Mrs Dawkins
  • We love our conservatory. It's the best room in the house! Like most people, we deliberated for quite some time about whether to invest in a conservatory. It was one of the best decisions we ever made. It has transformed our home. Test Valley Windows did a thoroughly professional job from start to finish, and we would have no hesitation in recommending their services.
    Mr & Mrs O'Brien
  • Thank you very much for my beautiful conservatory. I was very impressed with the quality of workmanship and coordination of all the tradesmen involved. I wouldn't hesitate to recommend Test Valley Windows.
    Mrs Brown
  • We’d like to say a big thank you to the Test Valley Windows team. They helped us realise our vision of extending out our kitchen to create a large, light space that the whole family can enjoy. The team worked hard, were friendly, polite and did everything they said they would.
    Mr & Mrs Dearman
    Eastleigh, Hampshire - 27th November 2017
  • We are delighted with our new conservatory, supplied by Test Valley Windows. First-class service right from our initial enquiry, with no high-pressure selling, right up to completion. Would highly recommend to all our friends and neighbours.
    Mr & Mrs Maddox
    Ludgershall - 26th May 2016
  • We have just had a new conservatory installed by Test Valley Windows (TVW) and are delighted with it. The installation went very much according to schedule with a minimum of fuss and inconvenience to our cats and us.Nothing was too much trouble, and any issues were quickly dealt with. We would heartily recommend TVW for any works involving windows, conservatories etc.
    Mr & Mrs Bainbridge
    Whitchurch - 6th July 2016
  • Just a short note to say how pleased we are with our new style conservatory. The overall look is wonderful and better than we had imagined. This was a large project from the outset but was managed professionally, efficiently and with good verbal and written communication by Malcolm at all stages. The build quality was of a very high standard which was noticeable even at an early stage and whenever an issue occurred which was bound to happen when some different parties were involved on a job of this size; these were always resolved quickly with a positive attitude. The finished product has been seen by friends and family who were all taken aback on initial viewing, which is the reaction we sought from the outset. We would recommend Test Valley Windows to anyone who is looking for a quality product and builds at an affordable price. Thank you once again.
    Mr & Mrs Lee & Debbie Pearson
    11th February 2016
  • Test Valley Windows gave us exactly what we wanted, were extremely helpful and professional and came highly recommended. Our new conservatory is beautiful and is the best room in our house. We wish we'd done it years ago!
    Mr & Mrs Donohoe
    Abbotts Ann - August 2009
  • I'm delighted with my conservatory, the service provided by all at Test Valley Windows was superb.
    Mr Robinson
  • I am writing to thank you for an excellent service and work you gave us in planning and constructing our new conservatory. The time that Malcolm spent in discussing our requirements and adjusting the design to ensure it would achieve all we wanted was particularly useful. The work your personnel produced is of a very high standard, and we were impressed by the efficiency and speed.
    Mr Evans OBE

The Historic City of Southampton

Test Valley Windows is proud to serve the people in the historic City of Southampton.

Southampton is a port city on England’s beautiful South Coast and is a surprisingly historic city brimming with important landmarks, monuments and memorials, both old and new.

Southampton is home to the SeaCity Museum, with an interactive model of the Titanic, which departed from Southampton in 1912.

The City also boasts Southampton City Art Gallery specialising in modern British art.

Vintage aircraft including the iconic Spitfire can be viewed at Solent Sky Museum, and Tudor House & Garden displays artefacts covering over 800 years of history, including a penny-farthing bike.

Our product list includes

Get in touch today

Our aim is the provide a professional service from start to finish, with minimal fuss to the customer. Every job is completed to the highest standards by our skilled fitting teams, with an after sales service ensuring our customers are completely satisfied.

If you are considering new doors, a conservatory, porch, guttering or double glazed windows in Southampton, give us a call or email, or visit our showroom and we will be happy to help. Tel.Southampton 02381244832