House Extensions

Adding an extension to your home is an exciting way to enhance your living space without the need to relocate. With Coral, your extension project in Yorkshire is handled with precision, ensuring a seamless blend with your existing structure, enhanced functionality, and a boost in property value.

Summer Offer: Save 30%

Order this July and you could win your order for free! With one lucky winner selected every day, there’s never been a better time to shop. Simply place your order and you’re automatically entered – no forms, no fuss

Terms and Conditions

July 2026 30% Off Selected Items Offer Terms and Conditions:
1. The “30% Off Selected Items Offer” is available on qualifying orders placed between 01.07.26 & 31.07.26.
2. The “30% Off Selected Items Offer” is available on standard casement windows, flush sash windows, uPVC tilt & turn windows, uPVC residential
doors, Composite doors, and uPVC French doors.
3. “30% Off Selected Items Offer” must be stated in writing on the contract at the point of sale. Coral cannot be held responsible for claims placed after
this time.
4. The “30% Off Selected Items Offer” can be applied to conservatory frames providing they are not included in the listed exclusions below.
5. The “30% Off Selected Items Offer” does not apply to aluminium bi-folding doors, conservatory roofs or Vertical Sliding Sash windows.
6. The “30% Off Selected Items Offer” offer does not apply to any building works, internal sills, window boards or trims.
7. The “30% Off Selected Items Offer” cannot be used in conjunction with the “July 2026 Free Colour Upgrade offer”.
8. There is no minimum order value to qualify for the “30% Off Selected Items Offer”.
Free Conservatory Roof Glass Upgrade Terms and Conditions:
1. The “Free Conservatory Roof Glass Upgrade offer” is available on qualifying orders placed between 01.07.2026 & 31.07.2026.
2. “Free Conservatory Roof Glass Upgrade offer” must be stated in writing on the contract at point of sale. Coral cannot be held responsible for claims
placed after this time.
3. The “Free Conservatory Roof Glass Upgrade offer” can only be applied to orders containing Coral Premium Roofs.
4. The “Free Conservatory Roof Glass Upgrade offer” can be applied to the following: –
 Ambi-Blue Self-Cleaning (1.2 uValue) can be upgraded to Ambi-Sunshade Blue Self-Cleaning (1.0 or 1.2 uValue).
 Ambi-Blue Self-Cleaning (2.7 uValue) can be upgraded to Ambi-Sunshade Blue Self-Cleaning (2.7 uValue).
 Ambi-Neutral Self-Cleaning (1.2 uValue) can be upgraded to Ambi-Aqua Self-Cleaning (1.0 or 1.2 uValue).
 Ambi-Neutral Self-Cleaning (2.7 uValue) can be upgraded to Ambi-Aqua Self-Cleaning (2.7 uValue).
 Ambi-Blue Self-Cleaning or Ambi-Neutral Self-Cleaning (1.2 uValue) can be upgraded to Ambi-Ultra Self-Cleaning (1.0 or 1.2 uValue).

Lowest Price Guarantee terms and conditions:
Our price promise has held Coral in good stead with our customers for over 35 years. We will not be beaten on price (please refer to terms and conditions below
for further details when comparing to other quotes from other companies), they must have:
1. The specification of the product must be fully sculptured 70mm profile.
2. The styles and sizes must be detailed on a letter headed quotation.
3. Conservatory frames – windows and doors should be of the same quantity, styles and design specification.
4. Conservatory roofs – must be of same design specification. “Tiled” conservatory roofs must be Ultraroof.
5. Warranties for each of the products must either be the same of better.
6. Have an Insurance Backed Guarantee (where work is covered by FENSA).
7. Have a BSI kitemark for survey and installation.
8. Be FENSA regulated.
9. Manufacture their own products.

It is important to bear in mind that Coral Windows and Conservatories have been in business with continuous trading for over 35 years and we do not take a
deposit or stage payments and only ask for payment when the goods are installed. This gives you, our customers 100% peace of mind.
Our CL3 Triple Glazed Range and other triple glazed windows are subject to size restrictions and style limitations due to the weight of the glass – see your
representative for details. The maximum size for any triple glazed glass unit is 1.7m2

due to health & safety reasons. Where a required unit size is larger, an A-
rated double-glazed unit will be supplied and installed.

“Self-cleaning” glass is not a ‘100% maintenance-free’ product but does offer a reduced need for manual cleaning.

*New windows from Coral could save our customers hundreds of pounds on their heating bills*
You can check both your potential savings on heating costs and your CO2 savings by entering a few simple details into our energy calculator which can be found
on our website https://www.coralwindows.co.uk
As an example, a typical customer (living in a semi-detached house which has wooden single glazed windows and mains gas heating) could save approx. £911 on
their heating bill over the course of the first 12 months after they had new double-glazed windows installed by Coral Windows (information correct as at
13/10/2023). Potential savings will vary depending on the information entered into the energy calculator.

Energy Efficiency

Our extensions are designed with energy efficiency in mind, using the latest glazing technology and high-performance insulation. These extensions  can achieve impressive U-values, with roofs as low as 0.15 W/m²K and high-quality glazing around 1.0–1.2 W/m²K, helping to keep your space warm, comfortable and energy efficient all year round.

Weather Resistant

Our extensions are fully weatherproof and engineered for your postcode, using high-performance components to withstand local wind and weather while delivering long-term strength and reliability.

Expert Installation

Coral’s team of skilled professionals, all local to the Yorkshire area, ensure a high standard of workmanship, with meticulous attention to detail.

Flexible Finance Options

We never ask for a deposit on a home extension, and we don’t take stage payments at any point. With Coral, you only pay once your extension is fully completed to your satisfaction.

House Extensions in Yorkshire

At Coral, we understand that a house extension is not just an additional room, it’s a part of your Yorkshire home. It’s where future memories will be made and a space where your family can grow. Our commitment to exceptional quality and customer service ensures that we understand your vision down to the last detail.

From the initial design consultation through to the final installation, our expert team works with you every step of the way to make sure your new extension meets your exact requirements. Whether you dream of a spacious kitchen diner for family meals, a sunny garden room, or a serene living area, Coral makes your expansion plans in Yorkshire a reality.

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Home Extension Specifications

Our house extensions are built to your precise specifications, combining durable materials, advanced insulation, robust roofing systems and tailored design features to create a comfortable, long-lasting space for your home.

Coral Home Extension Features & Benefits

Discover the features and benefits of our house extensions, designed to maximise your space and add lasting value to your home.

Expand Your Living Space

Our house extensions are an excellent way to add space and value to your home. Built to blend seamlessly with your existing structure, our extensions create an open, airy feel while enhancing your living space. Whether you’re looking to expand your kitchen, create a sunroom, or add a sleek new office, transform your home with a Coral home extension today!

Weatherproofing

Our house extensions are designed to be fully weatherproof, using high-quality materials and advanced sealing to protect against rain, wind and draughts. This helps keep your new space warm, dry and comfortable all year round.

Home Security

Our house extensions are built with security in mind, using strong materials and high-quality doors and windows to help protect your home. This gives you a safe, secure space you can enjoy with complete peace of mind.

See what our customers say about us

With thousands of installations completed, our reputation is built on happy customers. Explore their stories and discover why Coral is trusted for quality, service, and lasting value.

ITV Weatherman John Mitchell Upgrades His Home with Coral Windows

Olympic Champion Nicola Adams Chooses Coral Windows

Transforming the Kellett Home with Modern Style and Light

Mrs Watts modernised her whole home with new windows, doors, and roofline

Mr & Mrs Evans – Transforming Their Living Space with Bifold Doors

From Dilapidated to Dream Home: A Coral Windows Transformation

Surprise! Bradford Couple Wins Dream Home Upgrade in Coral Windows Prize Draw

We’re delighted to introduce Mr & Mrs Armitage, our May 2025 Competition Winners!

Frequently Asked Questions

Where is a house extension used?

A house extension is used to add extra space to your home without the need to move. It can be built at the rear, side, front or even over an existing part of the property, and is often used to create larger kitchens, extra living areas, home offices, bedrooms or open-plan spaces.

What are the benefits of a house extension?

Do I need planning permission for a house extension?

Are my house extensions energy efficient?

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