Double storey house extensions in and around York by expert architectural designers
Double Storey Extensions
Double storey extensions are an incredible way to completely transform your home while minimising costs at the same time. They are the perfect addition to create both space and value while minimising the costs of the space being provided since there is only one job, one foundation and one roof still being used, even despite the extra size.
We provide all kinds of two-storey extensions across the York and Harrogate areas and work directly with you to create the perfect design for your home. Our ethos is based on working with clients at every step of their architectural journey, helping you to actualise what you need for your extension while factoring in what’s realistically possible, making sure you get only the best designs.
Contact the York & Harrogate team today to speak to someone about your project and get free quotes and advice no matter what you’re trying to achieve.
Designing a double storey extension
Designs as significant as double storey extensions need a lot of time and nurturing in order to reach their full potential. The space is equivalent on both floors, after all, so utilising both is essential to getting a design you really love without wasting any space.
The regulations are stricter specifically about fire escape and structure, so these are key areas of focus too. You need to decide what you want to gain from the build, what you are willing to sacrifice, and how much you should spend to make the project perfect for your needs.
Once you know the room sizes required and how to access and ventilate them, you then need to make the external work with the existing house. There are limitations in the planning guide for two storey extensions, as they have more impact on their surroundings. We like to work with and enhance existing areas where possible, as this means less new building, lower costs and a smaller impact too.
Many design options involved in a double storey extension will be centred around the aesthetics of the extension from the outside as well as the inside, as this can influence decisions from all parties.
The regulations are stricter specifically concerning fire escape and structure.
You need to decide what you want to gain from the build, what you are willing to sacrifice and how much you have available to spend.
Double rear extensions must consider the overshadowing and loss of amenity/outlook from the neighbours if in close proximity to the boundary.
Site checks should be carried out on shared boundaries, party walls, mains sewers and if it is a listed building or in a conservation area special consideration should be taken.
The cost of a double storey extension as opposed to a single storey are to be considered, but don’t let this hinder your plans as this can be discussed when designing your build (and you’re saving on roofing and foundations).
Double storey side extensions are a great way to add additional space without compromising too much garden space.
Planning permission your home extension design
Double storey extensions generally need planning permission, as the permitted development rights only permit small sizes. There are a lot of things to consider before submitting a planning application, as there is a long list of factors that are reviewed before granting.
Some good questions to ask yourself are:
- How does it impact the street scene?
- Does it enhance character?
- Does it have a negative effect on the neighbours?
- Does it affect light/privacy/amenity?
These are the things the planning officer will be checking whilst making their decision.
Our design consultants will give you the best advice on how to achieve your requirements with the best chance of securing planning approval. We will prepare and submit the application on your behalf, and then act as your agent talking directly with the council throughout the application.
Take a look at our guide on outlining the planning permission application here for more.
Building regulations for double storey extensions
On top of your planning permission for a double storey extension, you’ll also need a building certificate from a building control body, either a local authority or a private building inspector. These building regulations drawings will then be submitted for a full plan check, amended if necessary, and, once approved, they will be the standard that is built to and inspected against.
Our plans will include all the necessary detail such as:
- Structure
- passage of sound
- disabled access, drainage
- resistance to moisture
- collision
- impact
- heat loss
- ventilation
- light
- emergency escape
These drawings will be used when the building control officer inspects the build to ensure the builder is carrying out the works correctly. You can commence works 5 days from submitting to building control, as this is the minimum time due to having to consult the water authority.
Project management for your double storey extension
Once you have all of your drawings and approvals, it’s time to move on to completing the project and approaching builders to provide quotations and prices. We offer project management across the whole of York and Harrogate if you’re looking for expert management, but if you choose to do it solo, we’re still here to offer some advice:
Choose a builder that you can trust to carry out the work and ideally has a good track record.
Remember that only half of the building works will be outside; you should plan and phase exclusion zones with your builder.
Check that any quotation you consider will be written up clearly and with good detail. You will need to know exactly what is priced for and any additional costs should unforeseen issues arise.
Use our drawings in line with the quotation and any additional information we don’t provide such as plumbing and electrics is agreed in detail before the first fix goes in. It will be costly to change things once the initial preparation has been built.
Book your call today
In our calls, you’ll chat with a friendly member of our design team. We’ll cover everything about your project, like the project brief, budget, design limitations, and advice on planning and building regulations, and much more.
