Because of this, you will have the ability to learn how much a conservatory will cost, how you can save money, and what costly pitfalls you should avoid as a result of our conversations with conservatory owners and industry professionals.

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The purchase of a conservatory represents a significant investment of both time and money. But price isn’t the only thing that matters; value for money is what really matters. You don’t want to take shortcuts with the price only to find out in the long run that spending a little bit more would have prevented you from having to deal with additional hassle and expense.

We break down the costs associated with constructing a conservatory, including how much you should budget for it, where you can cut costs, and which components are truly worth splurging on. Because you are a member of Which?, you have access to the aforementioned research.

Cost of a conservatory on average

The cost of a conservatory can range widely, making it difficult to determine whether or not you are getting a good deal on one. Because of this, we have collaborated with the Royal Institution of Chartered Surveyors (RICS), an organisation that publishes average costs for building work and repairs, in order to provide you with the average cost of a conservatory*.

The prices listed below are based on a conventional conservatory that has a glass ceiling and dwarf brick walls of 600 millimetres in height on all three sides. Both the conservatory structure and the assembly are included in the price.

You can also see the average price for each of the three different sized rooms. To provide you with a more accurate picture of the various choices you have, we have listed the prices for two distinct kinds of buildings below:

conservatories that are attached to the rear of a house and can be entered through an already present door conservatories with a new opening that are brought into your home by means of a pair of glazed doors are referred to as glazed doors conservatories.

The prices reflect a spectrum of costs, from using inexpensive and straightforward materials and finishes all the way up to more pricey and customised options.

You can get an idea of what your budget can buy by utilising the findings of our research, and you can also use these results to ensure that you do not pay an excessive amount for a conservatory.

Several distinct kinds of conservatories

The style of conservatory that you purchase as well as the kinds of materials that you can use are both available in a wide variety. If you want a conservatory that looks more like an addition and has a solid roof, then you should anticipate paying a higher price for it.

The price range for a garden room that is three metres wide by three metres long and has double doors, as well as an opening that leads into the house, is from £29,400 to £39,700.

You can also get more fundamental types of conservatories, such as ones that are made entirely of glass and have no brickwork at all. Depending on the other options that you select, this particular style of conservatory typically has prices that are lower than those listed in our table.

Take a look at our guide to the different types of conservatories we offer so that you can make an informed decision about the kind of conservatory that will meet both your needs and your financial constraints.

Additional expenses for the conservatory

Be aware that the price that was quoted to you initially may not end up being the price that you pay, as there may be additional costs that are incurred as the project moves forward.

According to the information that we were given by professionals, the following are some examples of factors that could lead to an increase in the price of your conservatory: A larger floorplan is likely to result in increased expenses because the larger the footprint of your conservatory, the more likely it is that you will be required to obtain planning permission. If it does require planning permission, you will need to budget for additional time and money to complete the process.

The height of your conservatory, as well as whether or not any drains or trees or their roots need to be moved, will cause an increase in the cost of the more complex foundations.

Opening up existing walls – As you can see from the RICS figures in our table at the top of this page, whether you have your conservatory simply added to the back of your home or have it integrated with a new opening can make a big difference in how much you pay to have it built.

Materials of a higher quality will result in an increase in cost, as will the use of high-specification building materials such as specialised glass.

Doors and windows – the cost will vary depending on the number of opening windows and doors that you select as well as the manner in which they open.

Costs will go up as a result of the installation of fixtures, fittings, and furniture, such as electrical sockets, TV aerial points, blinds, flooring, furniture, and heating.

When you are comparing prices from different providers, it is imperative that you double check to see precisely what is comprised of each offer. Request a written breakdown of the costs once you have decided that you want to go with a particular company. This will allow you to know exactly what you are getting for your money.

It is possible to keep costs down and even save money by doing so, and in some instances, you may find that you end up paying less than the initial quote. Despite this, you shouldn’t put too much stock in this being the case.

Utilize our downloadable conservatory checklist so that you can get a better understanding of what you need to think about when purchasing a conservatory, as well as what additional costs you may incur.

How to reduce the cost of building or purchasing a conservatory.

Here are some of our top recommendations for reducing expenses without compromising on the level of quality achieved.

The size of a conservatory

The size plays a significant role. When we asked people about their experiences, many of them admitted that they wished they had purchased a larger conservatory rather than a smaller one to keep costs down.

It is important to put some thought into the materials that you decide to use. A conservatory can have a temperature that is more agreeable to the occupants by being constructed with more substantial materials, such as an increased number of bricks or a solid roof.

Visit our page on typical problems associated with conservatories to learn how to avoid making the same mistakes that other people have.


Consider the activities that you intend to carry out in your conservatory.

The most effective method for keeping costs under control is to have a solid plan for how you intend to use the conservatory; after all, there is no point in shelling out money for features that you won’t end up using.

Extras such as electrical sockets, roof vents, and underfloor heating are likely to result in an increase in price; therefore, you should carefully consider whether or not you will require these additions.

Make an effort to negotiate with the company that owns the conservatory.

Examine the possibility of engaging in price negotiation. People have told us that by negotiating with the salesperson, they were able to bring the price down by more than half.

One customer shared their perspective, stating, “The salesman started at a cost of £85,000, and over the course of three to four hours we got it down to £35,000 with various discounts.”

Try doing your shopping during the off-season as well. Since the spring is the most popular time of year for people to purchase conservatories, you should try to avoid the busy season if you want to save money.

Although not all companies provide this service, inquiring about it is certainly something you should do.

Costs can be reduced by opting for a smaller conservatory, but many of the individuals we surveyed expressed regret at not purchasing a larger conservatory.

Extras in the conservatory that are worth the cost

It’s a good idea to try to keep costs as low as possible, but you shouldn’t make any sacrifices that you might come to regret in the future. Spending a little extra money to make your new room more comfortable is money well spent if you want to get the most use out of your conservatory.

Maintaining the temperature of your conservatory

The temperature has a significant impact on the degree to which you will be able to use and enjoy your conservatory. Therefore, the materials that are used to construct your conservatory, as well as any heating or cooling systems that you choose to install, are extremely important. One owner of a conservatory issued the following warning:

Because of the additional cost, I made the decision not to install heating or air conditioning in my conservatory. Therefore, it does not surprise me that there are problems with the room getting too hot or too cold. There are a variety of routes you can take to bring warmth into your conservatory among the many choices available.

You will be required to make a decision regarding whether or not to extend the pipework of your central heating system, install independent underfloor heating, or simply rely on vents, fans, and portable electric heaters or air conditioning units. Learn more about the various possibilities in our guide to the interiors of conservatories.

Conservatory roofs can be made of either glass or polycarbonate.

A roof made of polycarbonate plastic is likely to be less expensive than a roof made of glass. However, the industry professionals that we consulted cautioned us against making this decision because cheaper options may not be as effective at maintaining a constant temperature in the room, may let in less light, and may be noisier.

Solid roofs were suggested by a few of the people we talked to as an additional method to assist in the control of extreme temperatures; however, these roofs can make the rest of your home seem darker.

A useful piece of advice is that you should not be afraid to invest in specialised glass. Glass technology has advanced significantly over the past few years, and as a result, there are now varieties of glass that are both thermally efficient and self-cleaning.

When it comes to glare, tinted glass can also make a difference in the situation. However, this may not be required at all given the type of blinds you intend to use and the orientation of the conservatory with respect to the sun.

our guide on the pitfalls that can be found in conservatories to learn more about the advantages of using specialist glass.

Trying to keep the costs of building a conservatory down

Although the process of building something can account for a sizeable portion of the total cost, there are ways to keep expenses to a minimum.


Access to the site of the conservatory

Access to the location where your new conservatory will be built will have a significant impact on the total cost. When digging the foundations for your new home, it will save time and, as a result, money if your builders are able to manoeuvre a small digger into your backyard.

For instance, the foundations of a regular conservatory could be handled by a small digger in a single day, whereas if they were dug by hand, it could take approximately three days.

A helpful hint is that there are ways to improve your access; for example, you might be able to take side gates off their hinges or you might be able to ask a neighbour if they would mind if you accessed their property through their backyard.

With the help of our home improvements checklist, you will be able to ensure that you have done everything in your power to remain on schedule and within your financial constraints. This will allow you to steer clear of other problems that may arise during the construction process.