House Extensions

We install house extensions across Winchester, Kings Worthy, Arlesford, Bishop’s Waltham, Cheriton, Hambledon, Bournemouth, Southampton, Romsey, Petersfield, Ferndown, Winton, Ringwood,  Portsmouth, Hampshire, Chichester, West Sussex, Wiltshire, Surrey, Dorset and surrounding areas.

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Competitive House Extensions Prices


Orangeries Bournemouth

Suited to any Home

With County Windows, you won’t have to worry about missing out on the quality we have on offer. Whether your home is modern, traditional, period, heritage, or new build, you can rest assured that we’ll be able to offer you a house extension that is set to offer a completely seamless addition to your home that will bring complete satisfaction.

Extend What You Love

A modern house extension is the ideal way for you to increase your living space without having to undertake a costly and stressful move. We are able to offer cutting-edge designs that will perform just like the rest of your home. Our extensions will blend seamlessly into your home so you don’t have to worry about it compromising your property.

Look below for our range of styles.

Conservatories Kings Worthy

Get a Quote Today

Start your free double glazing quote today. Click the button below to receive a bespoke estimate, with no obligation to book.
Double Glazing Ferndown

Highly-Modern Design

All of our house extensions are designed to suit modern standards, which means they achieve contemporary standards of thermal efficiency, security, durability, weatherproofing and aesthetic. You’ll be able to enjoy a new living space that you can use all year round.

Thermally Efficient

Due to the thermal efficiency properties of our house extensions, you can rest assured that you’ll be able to keep the winter winds at bay. You could also find yourself saving money on your heating costs, as the warmth from your central heating will stay in your home for a longer period of time: allowing you to rely less frequently on your heating as a result.

Orangeries Bournemouth

Visit Our Showrooms

Visiting one of our showrooms is a fantastic way to see our windows and doors for yourself. Alternatively, you can also use your visit to speak to a friendly member of our team about our product range. Due to the COVID-19 outbreak, we request that all customers call to book a showroom visit. Click here to view our full statement.

Features and Benefits

Glass extensions specialise in offering you a bright and spacious living space to enjoy all year round. The glass roof is supported by super insulated columns, which work to offer you a feeling of solidity will achieving a modern standard of thermal efficiency that will keep the warm from your central heating inside for a longer period of time.

Due to an intelligent design, our glass house extensions comprise a feature that reduces solar gain. Not only does this keep you cool in the summer months, it also means that any furniture you have in your extension won’t fade over time. Choose from a uPVC, aluminium, or lantern roof to help create your home extension.

Our solid roof house extensions offer you the flexibility to bring a bespoke home improvement to your home. They combine the best in solid and glass conservatory roofs, allowing you to enjoy the freedom that comes with being able to add glazing wherever you want and in any shape you want. With this house extension, you’ll be able to control the natural light allowance coming in.

With a stunning internally plastered ceiling, our solid roof house extensions effortlessly capture a beautifully seamless feel. Choose from a wide range of lighting options to help create the ideal ambience, with the contemporary grey panelled roof complementing bi-fold doors perfectly to secure a contemporary and modern feel. These house extensions are structurally designed to your post-code to handle the wind and now loads in your area.

Bring a classic look to your home with our tiled roof house extensions, updated to suit the standards of today. Making use of the thermal properties of brick or super insulated columns, our tiled roof house extensions are able to keep you comfortable. You can also integrate full glazed panels to help natural light flood into your living space.

To bring a personal touch, choose a choice of 3 tile colours to match the house, including a selection of Velux roof windows to help increase ventilation too. You can also choose from a range of decorative cornice options to help keep your roofline looking neat and tidy, offering the best in function and form.

View Our Extensions Brochure


Start a House Extension Quote

Visit our online quoting engine to specify your House Extension needs. A member of our team will then be able to offer a price that has been tailored to your exact specifications to help make things as cost-effective as possible.

Alternatively, you can get in touch with a member of our team through our online contact form and we’ll always be on hand to answer any questions that you may have regarding our products or prices.



Our Testimonials

See what our customers have to say about their experience with County Windows!

Had front door installed today. Very efficient and tidy. Did it in awful weather! Thanks for doing a great job. Door looks amazing and feels very secure.

Kevin Drobecz
Winchester - February 2020
Thank you to you and all your colleagues involved in the project.  Without exception, everyone we have had on site has been a delight.  Everyone, from the word go has worked exceedingly hard to get the job done and, considering the weather, in exceptionally hard, cold and wet circumstances.  The guys have all been so helpful, polite, professional, courteous and friendly and nothing was too much trouble.
Double Glazing
Winchester - February 2020

My Conservatory is now complete. It looks wonderful. I would like to thank Gary and Greg for doing a great job outside and inside. They tended to every minor detail. The pair are a credit to your firm. I would also like to thank Nigel for overseeing all of the work.

Wiimborne - January 2020

Thrilled to bits with it all. Thankyou!

Double Glazing
Olivers Battery, Winchester - March 2018

A pleasure to deal with sales and survey… Will be pleased to recommend County to friends.

uPVC Windows
Alresford, Hampshire - April 2017

I was delighted with the installation professionalism… Our decision to visit County Windows for this job has proved right.

Winchester - June 2017

I was invited to inspect every factor of their work on completion which, as stated, was of the highest standard.

Double Glazing
Kings Worthy, Winchester - July 2018

Super service and very professional workmanship.

Copythorne, Southampton - July 2016

I wouldn’t hesitate to recommend or use County Windows again.

Customer in
Winchester - August 2017

We will recommend them (County Windows) to others looking for windows replacement.

uPVC Windows
St Cross, Winchester - September 2016

We have been very impressed with County Windows – Our whole experience has been easy and hassle free.

Andover - November 2018

Before retiring my husband worked for over 30 years in the industry so knew what standard of work he wanted from the various tradesmen. He could not fault any of them and we got the finished job we had hoped for. We are very happy and can highly recommend County Windows to anyone else considering them for similar projects.

Mrs Tomkin
Ferndown - March, 2019

County Windows replaced our conservatory roof, the installation team put our minds at rest from the very start. They did a fantastic job, and after the three days it took to do the job you would not have known they had been there. Our conservatory now looks great, thanks to all at County Windows, especially the installation team.

Conservatory Roof
Southampton - April 2019

I’m writing to say how pleased we are with our new conservatory roof. I have not contacted you before as we have been waiting for it to rain and it passed with flying colours. Also, my wife and I must mention the fitters, Jamie and Danny. We cannot praise them enough, they were always on time, kept us in the loop as regards to finishing off, the attention to detail was first class and they were pleasant to deal with. All in all, a very nice pair of lads. Thank you.

Conservatory Roof
Bournemouth - May 2019

I would like to thank you and the team for the replacement of our door and windows. It was a big concern to us and we spent some time deciding on who to order with. The team were polite and left the house looking clean and tidy, nothing was too much trouble.

Replacement Door & Windows
Eastleigh - May 2019

I just want to say how pleased we are with the re-glazed conservatory. It is a massive improvement and turned out every bit as nice as we expected. Your two people, Mark and Simon, were a pleasure to deal with, very considerate and did an excellent job on the installation and the finishing.

Conservatory Improvement
Bournemouth - June 2019

A very professional company No pressure selling. The installation team had a very high standard of workmanship with good time keeping and kept a tidy working area They also sent a installation manger to make sure we were ok with progress. Would recommend this company.

Mr Emery
Eastleigh - July 2019

A truly excellent job completed to a very high standard and with the minimum of disruption.

Mr Froud
Poole - August 2019

Excellent installation. Very professional. Would recommend. Top service!

Mr Fincham
Southampton - August 2019

Excellent service from survey/sales to installation.

Mr Cole
Eastleigh - August 2019

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Industry leading Accreditations

CO2 Energy Rating
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C. E. Mark
Made In Britain
Fensa Registered Company

County WIndows - Quality windows, doors, conservatories and much more!

We have showrooms across the south including Bournemouth and Southampton, with teams based throughout Hampshire and Dorset.