• 8:30am - 8:00pm Monday to Thursday 8:30am - 5:00pm Friday

Conservatory Prices by Size

25 Jan 2019

The larger the conservatory you want, the more you’ll pay for it. But how much more? There is definitely a premium but, in reality, that premium is probably not as big as you might think. When figuring out the very best way to spend your budget, you’ll also have to consider other factors like whether you install a dwarf wall and what your conservatory frame and roof are going to be made from.

In this article, CompareCompanies looks at:

  • just how much do conservatory prices vary by size – a full breakdown,
  • why conservatory prices vary by size,
  • the style of your conservatory and how that affects the price,
  • the four other important choices you make that can raise or lower your conservatory price,
  • whether you need planning permission for bigger conservatories, and
  • how to get the best price for your new conservatory, whatever the price.

How do conservatory prices vary by size?

The size of your conservatory does make a difference to the price you pay although size is certainly not the only factor in what you end up finally paying. In the table below, we look at general price ranges for uPVC-framed conservatories with glass roofs across the seven most popular conservatory styles in the UK.

While tables like these are helpful, you’ll never get the best, full, and final quote for you without actually speaking to installers yourself. By doing that, you’ll find out the actual costs involved in turning your dream conservatory into a reality. Fill in the form on this page to speak to 3-4 installers local to you to get a personalised quote with no obligation to buy.

Dimensions Type Prices range from Price increase % increase
3.5m x4m Edwardian £11,425-£13,175 £1,200 10.8%
4mx 4m Edwardian £13,125-£14,875 £1,700 13.8%
3.5m x4m Gable End £13,075-£14,825 £1,050 8.1%
4m x 4m Gable End £14,325-£16,075 £1,250 9.0%
3.5m x4m L Shape £13,975-£15,725 £1,155 8.4%
4m x 4m L Shape £15,275-£17,025 £1,300 8.8%
3.5m x 4m Lean To £11,925-£13,675 £1,000 8.5%
4m x 4m Lean To £14,025-£15,775 £2,100 16.4%
5m x 3.5m P Shape £15,425-£17,175 £1,300 8.7%
5m x 4m P Shape £16,725-£18,475 £1,300 8.0%
5m x3.5m T Shape £14,825-£16,575 £1,500 10.6%
5m x4m T Shape £16,325-£18,075 £1,500 9.6%
3.5m x4m Victorian £12,225-£13,975 £1,000 8.3%
4m x 4m Victorian £13,925-£15,675 £1,700 13.0%

get free conservatory quotes

Why do conservatory prices vary by size?

Standard conservatories take between three to four weeks to install – larger than standard conservatories can take up to a month and a half. They are major construction projects and any homeowner investing in one should expect it to take much longer than other home improvement projects they’ve done in the past. That’s because of the sheer volume of work required and the quality of workmanship needed to get the job just right.

The base work for your conservatory

The base work for your conservatory is the first job that your installation team will start on. The patch of land in your back garden where your conservatory is going to go and the areas surrounding it will, to all intents and purposes, will be a building site for a few weeks.

Your conservatory has to look great and so do the areas in your back garden surrounding it – that’s why many installers recommend that you think about installing an area of paving around your new conservatory.

Your installer will also want to protect any beautiful plants or shrubs you have from being damaged during the build – in many cases, they may recommend that any trees which overhang are cut back to create enough comfortable workspace for the installation team to work in.

They then mark out the base of your conservatory and begin excavation work, making sure that there’s no damage to any underground cabling or pipework. They lay a concrete foundation up to around 45cm deep then build up the floor level to around 15cm higher than any paving work or garden area outside.

Work on the flooring continues with a layer of sub-base, followed by sand blinding, then a damp proof membrane topped off by floor insulation. Finally, a concrete floor is added and then the base of your dwarf wall (if you have one) is fixed to the house wall.

Dwarf wall or fully-glazed sides

Originally, most conservatories had full-glass sides because they were intended for use as superior forms of greenhouses. Obviously, people now want them for a very different reason and, as a result, it’s much more common now for homeowners, despite the extra cost, to have dwarf walls on their conservatories.

Although not as visually stunning as having full-glass sides on a conservatory, the additional of a dwarf wall makes a material difference to how warm your conservatory is during the summer. Many homeowners believe that, in the summer, having full-glass sides makes their conservatory feel like a greenhouse or a sauna and this can quite often be the case.

You can choose how high you want your dwarf wall to be however most installers generally plan for a height of around a metre.

Your installer will take care to match your conservatory’s brick work to the brick work on your home – many people feel that this makes their conservatory look far more like part of their home rather than full-glass sides.

The amount of materials used in your installation

The larger your conservatory, the most materials will be needed to complete the build. Your installer will, more likely than not, be able to secure a discount on buying extra materials for your project – they may or may not pass some or all of these savings onto you.

Labour and sub-contractor charges

Again, with larger conservatories, more labour and sub-contractor hours are needed during its construction. If your conservatory requires planning permission (more on that later) or if you have very particular ideas about what you want your conservatory to look, this will take additional time for the builders to complete.

The style of your conservatory affects the price

Lean to conservatory size prices

Sometimes called “garden rooms” or “sunrooms”, lean to conservatories are the most popular type of conservatory in the UK.

Very flexible in design and suitable for all properties (including bungalows), this design features a sloping roof which leans from the property down to the edge of the conservatory. If you’re looking to gain the maximum indoor space from a conservatory on a budget, most installers would recommend a lean to style.

The standard quotes shown below are for contemporary uPVC framed, glass-roofed conservatories:

Dimensions Prices range from Price increase %age increase
3.5m x 2.5m £8,375-£10,125 £1,250 15.6%
4m x 2m £8,375-£10,125 £0 0.0%
4m x 2.5m £9,125-£10,875 £750 8.1%
3.5m x 3.5m £10,925-£12,675 £1,800 18.0%
3.5m x 4m £11,925-£13,675 £1,000 8.5%
4m x 4m £14,025-£15,775 £2,100 16.4%

get free Quotes

Victorian conservatory size prices

Victorian conservatories are a type of period conservatory, they’re larger than lean to conservatories, and they’re popular extensions to both modern and traditional homes.

Victorian conservatories are best noted for their steeply-pitched roofs and their bay window design at the front – they have either three or five facets or sides just like the bay windows on the front of a house. They are aesthetically elegant and they feature ridging that’s both beautiful and ornate. However, they don’t work well in smaller back gardens as they tend to take too much space away from any lawned or patioed areas you have.

As a rule of thumb, for every additional 50cm2 you make your Victorian conservatory, you will have to increase your budget by around 10.6%.

Edwardian conservatory size prices

Although only on the throne for a short period of time (9 years), King Edward VII lived through a time of enormous technological and design innovation. Edwardian conservatories are so-named because of the popularity of this style of conservatory during his reign.

One of the four most popular types of conservatory installation in the UK, the Edwardian style is airy, light, unfussy, and far less ornate than the more popular Victorian design. They feel incredibly roomy inside and, if one fits within your budget, they offer the perfect space for indoor personalisation with plants, ornaments, furniture, and more.

Edwardian conservatories benefit from an apex-pitched roof giving the space a vaulted height effect. It’s rather like the feeling you get when you walk into a traditional home with high ceilings- they seem much bigger than they actually are.

For every 50cm2 you add to floor space in your Edwardian conservatory, expect to pay around 11.3% more.

Gable end conservatory size prices

A direct descendent design-wise to the Edwardian conservatory, a gable end conservatory (sometimes referred to by installers as a “pavilion conservatory”) has an apex roof but it has just one side upright with the other sides sloped. Either rectangle or square-shaped, it has elegant, minimalist detailing which accentuates its internal dimensions even though gable end conservatories generally occupy a smaller footprint.

Its simplicity in design means that the increase in size by 50cm2 is smaller than other design types at around 8.6%.

L-shaped conservatory size prices

L-shaped conservatories are designed to fit around the corner of a property allowing linkage to other parts of your home. They’re a hybrid design – they borrow design elements from lean to conservatories and Georgian conservatories to create a contiguous, attractive, and extremely functional hole. Subject to getting the blueprints right with your installer, they can be made to work really well on either modern or traditional properties with height restrictions.

They work well on larger properties and they offer real potential for saving garden space too. Many homeowners will split their L-shaped conservatory into two different areas – perhaps one for lounging and the other for the kids.

For every additional 50cm2 you add to your L-shaped conservatory, expect to add an additional 8.6% to the price.

P-shaped conservatory size prices

Most popular on detached properties, the P-shaped conservatory is a stylish mixture between lean to conservatory and a Victorian conservatory. As with a L-shaped corner, homeowners like to create more than one living space in them as, often, these conservatories extend in different directions.

Style-wise, you can ask your installer to choose the ornate detailing of a Victorian conservatory or the minimal detailing on an Edwardian conservatory.

For your budget, factor an 8.4% jump in price for every additional 50cm2 to your P-shaped conservatory’s footprint.

T-shaped conservatory size prices

Think of a T-shaped conservatory like a double-fronted home – a door to the middle, often projecting from a bay on the front wall, with living space to either side of the central hallway. T-shaped conservatories are very long – normally the length of your home – with a jutting-out centre section in a gable or Victorian style.

Price-wise, for every additional 50cm2 you add to your T-shaped conservatory, you can add an additional 10% to the price.

What factors other than size affect the price?

Your conservatory’s frame

The three major choices of conservatory frame are:

  • uPVC frames – best option for homeowners on a budget. Very low maintenance, great insulation properties, and recent developments in technology mean that its better-looking and longer-lasting than ever before.
  • Aluminium frames – very long-lasting, rust-resistant, and low maintenance. A wide range of personalisation options are available and they are currently very much in fashion, particularly on full-glazed side conservatories.
  • Wooden frames – aesthetically beautiful and traditional, wooden frames undergo multiple treatment processes prior to being shaped for your conservatory to ward off future distortion or damage. Wooden frames require the highest level of maintenance out of the three options and it’s also the most expensive.

Your conservatory’s roof

Ask your installer for prices on the three most-popular new conservatory roofing options:

  • Polycarbonate conservatory roof – the best for homeowners on a budget, it’s quick to install, it looks great, and there are a lot of options to choose from.
  • Double glazed conservatory – great-looking and brilliant for insulation, the most popular choice for homeowners.
  • Tiled conservatory roof – the fastest growing conservatory roof type, tiled conservatory roofs are better at insulating against swings in outside temperature and from noise pollution. You can also let a lot of light in by choosing the right number of rooflights to suit you.

Your conservatory’s floor

The five most popular options for conservatory flooring are:

  • conservatory floor tiles – very easy to clean and works really well with underfloor heating systems.
  • wooden conservatory flooring – the classic floor covering to add style and elegance to the interior of your conservatory but it comes at a price.
  • laminate conservatory flooring – a cheaper alternative and offering a very close aesthetic approximation to wood.
  • vinyl conservatory flooring – very budget-friendly and provides additional warmth to your feet on colder days.
  • carpets for your conservatory – a great budget option and very handy for its fall-cushioning qualities if you want your kids to use the conservatory.

General cost considerations

Other factors that will affect the price of your conservatory in addition to the size are:

  • the number of electrical sockets you require internally and externally,
  • light fittings both inside and outside,
  • TV points (aerial, cable, and Sky),
  • telephone and broadband points,
  • base wall and house wall plastering, and
  • finishings (including skirting board, architraves, and so on).

Do bigger conservatories need planning permission?

Perhaps. If you don’t live a listed building, in a Directive 4 area, or in a conservation area, you won’t need planning permission unless your conservatory stretches more than 3 metres past your back wall (four metres if you live in a detached property) and it’s not more than 4 feet high.

If in any doubt, speak to your installer about your plan and contact your local Planning Office for extra help.

Getting the Best Conservatory Quote

To get the best quotes for your planned conservatory, whatever the size and the style, it’s always best to get 3-4 quotes from local installers. That’s because, when installers are in competition against each other, they know they have to offer the keenest possible price for your installation together with the best possible service.

CompareCompanies puts readers in touch with 3-4 trusted conservatory installers, all of which have been trading for at least a year and all of which are CERTASS and FENSA registered.

Speak to each installer about what it is you want and find the company that you feel the happiest to work with. There’s no obligation to accept any of the quotes you get from our installers.

To start, fill on the form on this page and we’ll be back to you shortly.

get free conservatory Quotes


We use cookies. By browsing our site you agree to our use of cookies.

Accept this cookie Find out more