Quick Price
Contact Us Book Showroom Appointment
Book Home Visit

Conservatory Conversions in Bristol, Clevedon and across the south west

Conservatory Conversions in Bristol, Clevedon and across the south west

Convert your conservatory into a new living space and enjoy your new home extension. Proving the better way to build, these installations are complete by choosing where you want walls, windows and doors, finished off with any style of roof. Your home can be changed by using wasted space into a new integrated part of your home. Rebuild your conservatory into a new extension today, start your free quote!

The Better Way To Build

Rapid Conversions

With no new base work used for conservatory conversions, they are pre manufactured off site which contributes to the fast paced installation. As no cement used, your home will benefit from a tidier space after installation is complete.


Our conservatory conversions are lightweight compared to others, it enables the use of existing conservatories bases. Transforming your conservatory conversion to become lighter than the old, it helps keep your costs down with Building Regulation compliant materials used.

Energy Efficient

 Conservatory conversions are five times more energy efficient than a regular home. Something every homeowner wants, you can save money on your energy bills by a great deal each year, costing up to £1,000. Enjoy the warmth and comfort from your new conservatory conversion. 

Added Value

Conservatory conversions are perfect for adding increased space to your home, the walls are a slim build contributing to creating a larger space. It also helps to upgrade your conservatory as it adds to the saleable value of your home in Bristol, Clevedon or the wider south west.

Glass Roof

The original and most configurable roofing system with over 1.5 million installed throughout the UK, the glass roof is a strong, high quality and reliable asset to your conservatory conversion.

  • Watertight in winds up to 130mph
  • Fully customisable with a choice of 4 unique Cornices and bespoke colours
  • Advanced software to validate any large shape or complex designs
  • NASA satellite data used to precision engineer for wind and snow loads



The Ultraroof is the lightest tiled conservatory roof available with easy installation and high quality performance.

  • Weighing 38kg/m² lighter than any other solid roof
  • U-Value of 0.15 or 0.12 for incredibly thermal performance
  • Complete structure fully fire tested
  • Strongest unsupported spans up to 4m


For any shape and any size, the livinroof is the most configurable solid roof system available with plenty of options available to suit your conservatory conversion. 

  • Weighing lighter than any other solid roof at 31kg/m²
  • Bespoke options with highly configurable shaped glazing options for increased natural light
  • U-Value of 0.15 or 0.12 for increased thermal insulation
  • Fire tested and rated as B-roof according to EN13501-5: 2016.

Flat Roof

The flat roof is the strongest and lightest flat standing roof system for your conservatory conversion, integrated with lanterns or flat skylights.

  • Weighing only 51㎡
  • Works with continuous window frames
  • Customisable designs available in any RAL colour. 
  • Holds U-values as low as 0.12 W/m2K 


Conservatory Conversion Prices

Get Your Designs

Convert your old conservatory into a brand new conservatory conversion with hup!, the revolutionary new building system. You can benefit from increased thermal performance, bespoke designs and strong Building Regulation compliant materials.

Request a free quote today to find out more and start transforming your conservatory!

Customisation Options

Get 3 FREE designs in 2 simple steps.

Find the perfect living space for your home with our user-friendly conservatory contact form. No matter what design you’re looking for, you can find the ideal designs for your home with our services.
Step 1

Select Your Favourite Designs

Select your favourite designs, send us a photo of the back of your home, and we’ll send you three personalised living spaces superimposed onto the pictures you send us.
living spaces
Step 2

Choose Contact Method

We offer a variety of ways to get in touch with us for our living space designing services. Whether you prefer to message, email or call, you can choose the right method for you below.
Chat On WhatsApp
Request Callback
Submit Enquiry
Step 3

Enter Your Details

As you’ve selected to request a call or email, we’ll need some additional information from you to start the design process.
Final Step

Thank You! We’ll Be In Touch Shortly

Thank you for submitting your request. We look forward to working on your dream living space project with you.

What Happens Next?

Picking your favourite designs is just the start of your dream living space. Now that we’ve received your contact request and favourite designs, we’ll be in touch to assist you with our superimposed images. We look forward to hearing from you!

Why Choose Us?

Since 1982, we’ve developed a knack for high-quality work, with even higher quality customer service, so you’ll never need to worry when you’re with Britannia.

See Our Before & After

Want to see how we can transform your old conservatory? View our before and after photos here!
ISO 9001
Made in Britain
National Warranties
Sabik Marine

Decades of Experience

Britannia Windows has operated as a family run home improvements company for more than 40 years. In all that time, we have established ourselves as a source of excellence, whether you're looking for a new conservatory, orangery, window or door.

Expert Installation

We take care of our customers along every step of the journey. Nothing is more important than installation. When fitting your orangery extension, our team will take great care to ensure a tidy, smooth and professional experience.

Made in the UK

As our name would suggest, we manufacture all of our orangeries right here in the UK. This is handled in our Clevedon based factory. From here, we can ensure that all of our house extension products meet our and your high standards.

10 Year Guarantee

We stand by the quality of our windows, doors and orangeries. So much so, in fact, that we include a ten year guarantee with every installation. This means you'll enjoy at least a decade of hassle free enjoyment from your new space.

Finance Options

It can be a big decision to choose a new orangery for your home. To help you make that decision, we have a range of finance options available that will allow you to spread the cost over a time that suits you. Explore our full range of options here.

Range of Accreditations

We are extremely proud of the level of service and the quality that our orangeries provide for homeowners. But you don’t have to take our word for it! We are accredited by Secured by Design and Certass, reflecting the quality of our products.

Increased Living Space

The special feature is the conservatory conversion walls are so slim, meaning you will gain 10% to 15% more floor space. This can completely transform your conservatory with lightweight materials, as they can be built onto your existing conservatory base. Create your new living space with our conservatory conversions.

conservatory conversion

Adaptable Designs

Compatible with any finish, you can customise these conservatory conversions to your home. Usually, to renew your conservatory the options have been to replace the roof and upgrade the roofs. You can build a new extension in a similar time to replacing your roof.

conservatory conversion

New Building Technology

The new revolutionary building system that is hup!, the walls click together forming a strong I-Beam structure. This outstanding element is increasingly better than traditional building methods providing increasingly better strength. 


conservatory conversion

Frequently Asked Questions

Do you need permission to convert a conservatory?

Planning permission isn’t needed to convert your conservatory. However, building regulations may be required. With our conservatory conversions, the designs are completely compliant with the latest building regulations. Saving the hassle and providing a smooth process from start to finish. 

Which roof type is the best?

All our conservatory conversion roofs are high quality performing and create a comfortable living space. Each roof has it’s own features and values, but they are all energy efficient helping your home in Bristol, Clevedon or the south west stay warm all year round. Being customisable, they have the ability to style it to your own home and bring a new style.

How can I find out prices for your conservatory conversions?

You can request a free online quote or speak to our friendly team members by contacting us. Simply tell us your requirements and you will receive a quote.


British Board of Agrément (BBA)

The Ultrapanel technology used in our conservatory conversions has been independently and thoroughly tested, assessed, and approved by the BBA for use in UK housing products. Ultrapanel passed the BBA’s evaluation in thermal and structural performance, condensation, fire, and durability.

Fire Safety

Applus confirmed that the fully assembled walls of our conservatory conversions comply with the Building Regulations’ fire safety standards. Independent fire tests also show that the fully assembled structure of our tiled and solid roofs comply with all the Building Regulations’ fire safety requirements.

NHBC Accepts

The Ultrapanel technology used in our conservatory conversions is used on new houses throughout Bristol, Clevedon and the south west. This has been recognised by NHBC, which provides guarantees on new homes.


The Steel Construction Institute (SCI) conducted two strength tests on the walls of our conservatory conversions and compared them to traditional brick and block walls. It was found that the walls of our conservatory conversion have the same vertical loading strength as brick walls and are 70% stiffer than brick walls.


Assent is a Building Control Approved Inspector who works to industry codes of conduct and building control performance standards. The walls and roofs of our conservatory conversions fully comply with Building Regulations and have been pre-approved by Assent. This provides you with a quicker route to Building Regulation compliance.


JHAI is a government-licensed Approved Inspector that provides Building Control for all types of building projects. The walls and roofs of our conservatory conversions fully comply with Building Regulations and have also been pre-approved by JHAI for quicker compliance with Building Regulations.

Happy Customers

Lady drinks coffee and watching through windows and doors

© 2024 Britannia Windows (UK) Ltd. All rights reserved

Credit is subject to status and affordability. Terms and conditions apply. Authorised and regulated by the Financial Conduct Authority. Network Britannia Windows Limited FCA Register no. 738269 trading as Britannia Windows Bognor, Britannia Windows Bristol, Britannia Windows Eastleigh is an appointed representative of Ffenestri Limited FCA Register no. 716352 Kimberley Road, Clevedon, Somerset, BS21 6QJ is a credit broker, not the lender. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC. Authorised and Regulated by the Financial Conduct Authority.