While they may not be a common sight, two-storey conservatories are certainly eye-catching features, adding instant ‘wow’, not to mention creating some beautiful, light-filled spaces internally.
Think conservatory They’ve come a long way since the 1980s, when they earned their reputation as flimsy add-ons prone to leaks and too cold to pass time in the winter months. These days, thanks largely to advances in glazing technology, they can be designed to provide a lovely sunny spot from which to sit and enjoy the garden, protected from the elements, all year round.
But can they really span more than one floor? Is it a good idea to try to add a two-storey conservatory to a house and what does the job entail? We put it to the experts.
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Do you have a two-storey conservatory?
If you’re adding a conservatory to increase floor space within your home, it makes sense to consider ways to maximize this new structure, and building a second floor will certainly do this – but is it practical?
“Two-storey conservatories are quite specialist projects and require careful planning from the outset,” says Michael Arrowsmith, Manager Etheridge Windows. “They are also quite unusual, not something we get asked about very often compared to standard conservatories or single storey extensions.
“Structurally, they are very close to A Tiny house extension More than a typical conservatory,” Michael continues. “You are effectively adding two levels of glazed space to the rear of the property, so the foundations, structural supports and how the new structure connects to the existing building all require proper design work. In most cases steelwork will be involved and a Structural Engineer would normally be part of the process.”

Michael Etheridge is a Manager at Windows, a family run business founded in 2019. They specialize in doors, windows and conservatories and aim to make the whole process of choosing new windows and doors stress free.
What is a two-storey conservatory?
Unlike standard conservatories, the two-story design is rather complex. Every aspect needs more thought, including their foundations and how those second floors will be supported.
“From a design point of view, the biggest consideration is how the upstairs connects to the house,” says Michael Arrowsmith. “Some homeowners use the space as part of a bedroom or landing area, while others create a balcony overlooking the conservatory below. Either way, it needs to feel like part of the original building rather than an add-on.”
Often, these two-story structures are either more similar to orangeries, with more concrete elements than conservatories, or complex. Glass Box Extensions.
“In one project we completed (seen below), the lower basement floor was completely excavated and expanded to create a bright, functional space that previously had no access to the garden and now opens onto a lower courtyard,” explains George Lucas, marketing executive. Vale Garden Houses. “The upper level orangery offers light-filled views into the garden. This design approach created a large amount of usable space across the two levels and allowed light to flood both levels of the home. It also transformed how the home is used, creating a seamless connection between both indoor and outdoor levels while enhancing the functionality and aesthetics of the rear elevation.”

George Lucas is the Marketing Executive of Vale Garden House. He brings a wealth of knowledge and experience of conservatories contributing to all areas of the company.
Are two-storey conservatories a good idea?
If a two-story conservatory is something you’re considering, you can debate whether or not Extension or Conservatory will be the best option for you. So what can a double-height conservatory offer?
“The main advantage is the amount of space and light you get,” says Michael Arrowsmith. “You’re creating a high glazed area that can transform the back of the property and bring a lot more light into both levels of the house. For homeowners who want something visually appealing, it can make a big impact.”
“One of the benefits of a split level conservatory extension is that you get increased living space without extending too far into the garden – something particularly valuable in townhouses or homes where outdoor space is limited,” adds George Lucas.
What are the disadvantages of a two-storey conservatory?
Given that this type of structure will take time to design and build, cost you a fair amount of money, and have a big impact on the look of your home, you need to go into a project fully aware of the additional downsides of double-glazed windows like this.
Michael Arrowsmith states, “There are a few drawbacks to be aware of. Cost will always be a factor, as you are dealing with a much larger structure and a more complex build than a standard conservatory.” “Thermal performance also needs careful consideration. Modern glazing and roof systems can cope well with this, but it needs to be properly specified at design stage.”
It would probably be for this type of building with a need to address OverheatingYou’ll also need to look at other commons Conservatory difficultiessuch as poor privacy measures and inadequate ventilation. And don’t forget, all that extra glass will need regular cleaning if you want it to be an attractive addition to your home.
Are two-storey conservatories expensive?
Any type of heavy-glazed structure, be it Expansion or orangeIt needs to be carefully designed and specified if you want it to be a beneficial addition that will stand the test of time – and this type of project doesn’t come cheap. when Conservatory expenses While most are affordable compared to other types of extensions, when you start adding other layers, the prices start to increase.
“In terms of cost, a two-storey conservatory will usually start somewhere around £35,000 – £50,000 and can go beyond that depending on the size, materials and structural work required,” states Michael Arrowsmith. “If the building needs significant changes, that cost can add up very quickly.”
Given that it is possible to add a simple, small uPVC lean-to conservatory for as little as £12,000, you can see it makes a big difference.
FAQs
Do you need planning permission for a two-storey conservatory?
Part of the beauty of standard conservatories is that they are rarely needed Planning permissionThey provide to meet Approved development In the case of standard two-story structures, however, things can be very different.
“Unlike most single-storey conservatories, two-storey designs almost always require planning permission due to their height and visual impact,” explains Michael Arrowsmith. “That’s not to say they’re difficult to get approved, but the design needs to sit comfortably with the property and surrounding homes.
“Good drawings and early discussion with the local authority make the process much easier.”
Even where your conservatory does not require planning permission, Conservatory Building Regulations There will always be a need. Not only will they ensure that the structure is safe to move in over time, but sticking to them will also mean that your new addition is energy efficient.





