More space: will you go brick, go glazing or both?
April 17, 2025
It’s a ‘yes’ to more space but you’re unsure as to whether an extension or a conservatory is more suited to your home? You’re in the right place to carefully explore the pros and cons.
Expanding your home can create the extra space you need while improving the indoor-outdoor connection. Both options offer great potential, so it’s important to weigh up their benefits and drawbacks and establish what best fits your lifestyle and budget. Cube breaks down the key differences to help you decide which one could add the most value to your home.
KEY DIFFERENCES EXPLAINED
An extension has solid walls and a roof, often incorporating large glazed areas. In contrast, a conservatory typically features at least 50% glass in its walls and 75% in its roof.
Another key difference is building regulations, which apply differently: conservatories may be exempt from building regulations providing they fulfil certain criteria. Conservatories are required to be independently heated, separated from the main house by external quality doors and can’t exceed 30sqm in size. However, the consent process is similar. Whether you’re building an extension or a conservatory, approval can typically be obtained through permitted development if it meets the relevant criteria or through planning permission provided it complies with local policy.
Since conservatories are simpler structures that can largely be fabricated offsite, they typically have shorter build times than extensions.
£ COMPARISON
Costs can vary significantly depending on your specific requirements and the scope of the project. Therefore, it is advisable to obtain multiple quotations for comparison. As a starting point, extension projects generally begin at £30,000, while conservatories could cost half as much, especially if you buy an off-the-shelf design.
WHICH OPTION ADDS THE MOST VALUE?
They both can add value. If you’re aiming to add more space and value, an extension is likely to be the better option, generally adding 5-20%, while a modern conservatory may add a little less, at around 5-7%.
IS THERE A RISK OF REDUCING VALUE?
The value of an extension or conservatory depends on its design and construction. A poorly integrated addition could diminish rather than enhance your home’s value. Conservatories, in particular, are susceptible to issues like garden isolation, light obstruction from required external doors and visible clutter as homeowners struggle to maintain a comfortable temperature.
DECISIONS, DECISIONS…
If you’re still torn between an extension or a conservatory ask yourself these three key questions: Why do I need more space? How much additional space do I need? Where would I like to create that space?
We’ve also summarised a few final facts to consider in your decision making:
Extensions…
- Maximise space when they’re well-planned;
- Give you a great choice of options due to many different extension types and roof finishes;
- Are more desirable for families looking to expand their existing space in a functional way;
- Provide homeowners with greater flexibility in spatial design, both independently and within their existing layout;
- Can also be built over two storeys;
- Can create a seamless transition between existing and new living space.
Cube’s top tip: Our extension explainer is a great, easy-to-understand resource to explore the different extension types and roof finishes available.
Conservatories…
- Are ideal if you plan to use the room for a specific purpose and don’t mind it being separate from your main living, kitchen and dining areas;
- Provide a more intimate link with a garden;
- Create a light-filled room due to the expansive glazing;
- Can maximise your proximity to nature if you opt for an all-glass version.
Cube’s top tip: An all-glass conservatory is ideal for gardens that are not overlooked by neighbours.
THE CHOICE IS YOURS…
Conservatory, single or double storey extension – the right choice is the one that best meets your spatial needs. Your vision is best realised with an end-to-end build company you can trust to manage your entire project. After all, a poorly designed space can undermine your objectives altogether.
Cube’s award-winning team will look after your project from design and project management through to build and completion. Take a look at our extension portfolio to see what we have achieved for other customers.
Add more space, more value and more joy to your home without the hassle of moving. Cube has extended customers’ imaginations up and down the road from Berkshire to Surrey, Kingston upon Thames and Richmond.
Get in touch for your free initial design consultation. We’d be more than happy to provide a comprehensive quote so you can compare options and make an informed decision.