Allerton Windows
Open Bifold Doors into Garden

Conservatories, Orangeries & Extensions Wirral

Allerton Windows are the conservatory, orangery and extensions experts for the Wirral area. Based in Bootle, we’ve spent over 20 years plying our trade to homes and businesses across the Wirral, Liverpool and North West.

Our tried and tested processes have been used to transform our clients’ homes using the very best materials available and exceptional attention to detail in every aspect of our work. Established in 1995, we are now considered to be the largest conservatories and orangeries specialists for the Wirral and the North West and you only have to take a look at the hundreds of reviews left by our happy customers to see why.

We apply the same consistent level of workmanship to all of our jobs, so whether we’re replacing your doors, fitting your windows, or extending your home, we can guarantee an exemplary quality of finish that you won’t find anywhere else. Get in touch with us to find out more about prices and design.

Allerton Windows

Fill in the form or call us now to get your project started: 0151 268 03860151 268 0386

  • If you have photos or plans that will help with your enquiry, please upload them below.
    Drop files here or
Bright and Attractive


Our conservatories are one of our most popular products on the Wirral and prove that when they’re done properly they can truly add value to a home. Built to the same exacting standards of our orangeries, your conservatory can be built to your specification from top to bottom.

Choose from dozens of options of sizes, shapes and colours in our conservatory showroom here in Liverpool, or take a look at our gallery for inspiration.

How much is a conservatory UK?

Lean-to Glass conservatory 3.0m x 3.0m could cost in the region of £7,500 to £10,000. Victorian Glass conservatory 3.5m x 3.5m could cost in the region of £10,500 to £15,500. Loggia Glass conservatory 3.5m x 3.5m could cost in the region of £10,000 to £15,000.

How many years does a conservatory last?

The average life expectancy of a standard conservatory used to be around ten years, but, with experienced fitters, modern installation methods, the use of high quality of materials, and proper maintenance, buyers can now expect a uPVC conservatory to last around 25 years.

Can you use a conservatory all year round?

With Allerton Windows, you can install roofs, doors and other features that can allow you to use your conservatory all year round. Many older structures use cheaper materials that aren't as effective for your home.

Is a conservatory or extension cheaper?

Typically, you will save significantly more by installing a conservatory instead of building an extension. Whereas a conservatory is usually priced depending on the size and style you require, extension costs are normally priced per square metre.

Does a conservatory add value to your house?

Conservatories will add value to a home, but they need to be made with quality materials and provide a lot of light in order for the value to be significant. Done correctly, a conservatory costing between £4,000 and £10,000 could increase value by five per cent – an average of around £15,000

What is the cheapest type of conservatory?

Lean-to conservatories, where three walls are constructed against the existing wall of your house, with the roof sloping down over the conservatory, are the simplest and cheapest style of conservatory.

How much does a conservatory with a tiled roof cost?

On average, you can expect your tiled conservatory roof to cost from around £4,000 for a smaller conservatory (anything below 4000mm x 4000mm), and up to £6,000 for a larger conservator (over 4000mm x 4000mm).

How big can a conservatory be without planning permission?

You can build a conservatory or single-storey extension without planning permission if: It is a maximum height of 4m high or 3m high (if within 2m of a boundary). The conservatory does not cover more than half the garden. The roof ridge or top point is not higher than the eaves of a property's roof.

Do conservatories need foundations?

Like other new extensions, conservatories must have foundations in place. Foundations are necessary for transmitting the building's weight safely to the ground. Without adequate foundations, the structural integrity of a conservatory is severely affected.

What is a good size for a conservatory?

The most popular size for a small conservatory is 10' x 8'. A popular size for a large conservatory is 10' x 20' - large enough for dual use, with a lounge area and a dining area or perhaps a utility room and a lounge area

Are lean to conservatories cheaper?

Lean to conservatories are the cheapest option when it comes to external glazed structures – also known as conservatories!

What's the difference between an extension and a conservatory?

The main difference between a conservatory and an orangery is that the former are usually made from glass or polycarbonate panels. This brings the outside inside, without the solidity or grandeur of an orangery. An orangery can be designed to include floor-to-ceiling glass, and brick pillars can be excluded.

How much does conservatory cleaning cost?

For an average size conservatory you should expect to pay from around £150 for inside cleaning only and £300 for both inside and outside cleaning. Full valet service prices come to around £650. [According to]

How can I heat my conservatory?

If you're looking to heat your whole conservatory, you may want to look at an affordable electric panel heater. Electric panel heaters have come a long way in recent years, so a quality panel heater is now much cheaper to run than most central heating systems!

How much does a lean to conservatory cost UK?

The cost of a Lean-to conservatory will vary depending on its size and the materials that you use. As a guide, a 3500 x 2000 Lean-to conservatory with a glass roof will cost you between £7500 – £8500.

Smartly Built

Replacement Roofs

We can now fit all of our conservatories and orangeries with Celsius solid retrofit roofs. These structured insulated panels are a great way to keep heat locked into your extension and can even be fitted retroactively onto a pre-existing conservatory.

If you’re settled with your current conservatory but would like to make more use of it during the winter months (without spending a fortune on heating each year) then fitting a solid conservatory roof replacement could be just the thing for you. Each and every one we fit is bespoke to the job, so we can allow space to fit downlights or speaker systems into the eaves.

Light and Expansive


Orangeries make for an ideal addition to your home, giving you more room to enjoy your leisure time, whether that’s a new cinema room, play room or dining room – you decide!

We take great pride in all our orangeries, which is why we include a ten year guarantee against cracking, fading and warping. All of our orangeries feature heat reflective, UV-protected Celsius glass, lead-free construction and EasyClean glass technology to make aftercare a cinch. Allerton Windows can also incorporate a series of bifold doors into your build so that you can seamlessly connect your new living space with your garden.

Expand Your Home


Our construction experts have years of experience and have built up a stellar reputation for completing extensions on time and within budget.

We understand that building an extension is a big investment and aim to make the experience as smooth as possible, from drawing up your plans to tidying up after ourselves on the final day.

Strong and Safe


We understand how highly our customers value security, which is why we use double-sealed Liniar profile doors as standard for our replacement jobs. Each door has a wood-like finish and is constructed with resistant UPVC, making it a tough and resilient addition to your home. In addition to being secure, these Liniar doors are also fantastic draught eliminators, saving you even more money in the long run.

We offer a range of quality door brands, besides Liniar, including Rockdoor, Masterdor and Door-Stop. Visit our showroom to take a look at the wide variety of styles, materials and colours that we have to choose from.

Secure and Stylish


Our customers seek three things when it comes to replacing their UPVC windows: longevity, security and insulation. Our bespoke window replacement service on the Wirral offers all three of those qualities, in combination with highly efficient glass, dual compression systems and fusion-welded joints, for guaranteed satisfaction.

We’ve built a winning reputation for being the best double-glazing window suppliers on the Wirral and have the professional work of our employees to thank for that; they’re consistently rated as being tidy and timely by our customers.

Allerton Windows

Fill in the form or call us now to get your project started: 0151 268 03860151 268 0386

  • If you have photos or plans that will help with your enquiry, please upload them below.
    Drop files here or