Double Storey Extension

Double Storey Extension

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Our Services for Double Storey Extension

Our Services for Double Storey Extension

Opting for a double storey extension not only gives you that extra space, but will also add value to your property. Many homeowners consider a two storey extension over a single storey extension, as whichever option you choose, you only need one roof and set of footings. Thus you get more value for your build and that extra space for bedrooms or bathrooms you require with a house extension London

There are many options for where to have your extension built including basement extensions and loft conversion, however, a double storey rear extension is normally the best location. Before you start working with architects in London, you will need to consider how to use the extra space, extra living space, kitchen and bathroom are the best use and easier to blend in to your existing property.

A double storey extensions is a two storey extension that extends the size of your living space or house on two floors, so you have a ground and second-level floor. A two storey extension creates the most room for your home, as you have twice the space of any other type of extension. In fact, a two storey extension opens up lots of space, so families can enhance their living space, as well as having an additional room upstairs that can be transformed into an extra bedroom, an office or even an ensuite for the existing master bedroom. A double storey extensions opens up opportunities, providing additional space as your family grows.

Two Storey Extension Ideas

There are a variety of different two storey extension ideas for you to choose from, allowing you to make the extra space work for you and your family. You can transform the upstairs into another bedroom or even two, which will give you the space you would be looking for in a new house, but instead, you can stay in the house that you have made into your home. A two storey extension also allows you to make the upstairs and downstairs more spacious, by opening rooms up to make them bigger or even adding another bathroom to ease the bathroom traffic in the morning.

Downstairs, you can use a double storey extension to create a fantastic living space, with plenty of room for family gatherings and to make the space enjoyable to spend time in. You can even opt for an open-plan kitchen with new appliances and a bespoke design for entertaining and family meals with a double storey extension. What’s more, you can also have the choice of incorporating a living area and a dining area together with bi-fold doors that can open up into your patio or garden, to make your property feel bigger and to utilise the space better.

Another option is to invest in a double storey garage extension, which gives you space at the side of your house above the garage and free up lots of room upstairs. This is a typical side double storey extension; a double storey garage extension doesn’t have to be on the side of the house. However, it’s a popular choice, as it enables you to use up any wasted space above your garage, so you can make the most of your property.

By investing in a two storey extension, you can make your property more competitive in the housing market. Therefore, if you decide to move house in the future, you know that you can market your property at its maximum value due to your double storey extension.

If you would like to find out more about how we can help you with a double storey extension, don’t hesitate to contact our professional and helpful team. We are happy to answer any queries you may have and get you started with your two storey extension, so use our free house extension cost calculator and get a free quote from us, today.

Why Choose us for your Two Storey Extension?

A two storey extension is one of the more complicated ways of adding value to your home, however, if your local planning authority grants your application, the rewards can be life-changing. Not only will you boost the value of the property overall, but you can also enjoy the vast amount of space created, often doubling the usable space!

We are firm believers that anything is possible, and with over 13 years of experience and a huge number of successful projects delivered, it is starting to become a reality. We specialise in Surrey and London house extensions, and throughout our experience, we have encountered everyone from planning officers to builders and built healthy working relationships with all in between. Due to this, nothing is impossible, and our like-minded architects will guide you through the choices to deliver you the very best of two storey extensions. If you are looking for two storey extension ideas, get in touch today to see how we can help you.

Our team can support the initial concept design to detailed interiors and kitchen design, followed by project management and completion with our local, fully vetted construction professionals who offer competitive build quotes. No matter the size of your two storey extension, Extension Architecture is here to help.

Following an initial phone consultation, one of our experienced surveyors will visit your property to get the ball rolling. At this stage, we will work alongside you to develop the brief and ensure that we can generate a feasible proposal that aligns with both your priorities and the requirements of your local planning authority. Contact us today to organise an initial consultation and receive a personalised quote if you are looking for two storey extension architectural services!

Double Storey Side and Rear Extensions

Depending on your properties type, there are several two storey extensions to choose from:

1. Two Storey Rear Extension – Applicable for any property type, however, beware! Local planning authorities often shun two storey rear extensions, especially if you are situated in a dense residential area. An experienced architect will give you the best advice to navigate your council’s two storey extension policies and grant you the best outcome possible.

2. Two Storey Side Extension – Only applicable on detached and sometimes semi-detached properties – space dependant – are a great way to utilise unused space for more accommodation. Whether this is an extra bedroom or home office, our two storey extension specialists are on hand to give you the best advice and make your dreams a reality.

  1. Double Storey Side Extension – The double storey side extension is similar to the regular two storey side extension but it involves extending both floors of your property sideways. It offers even more space for additional rooms or functionalities. Planning permission and adherence to local building regulations are crucial for this type of extension, and consulting with professionals, like ours at Extensive Architecture, who specialise in building a double storey side extension is highly recommended to ensure the project’s success.
  2. Rear Double Storey Extension – Expanding your home’s footprint into your backyard with a rear double storey extension offers a multitude of possibilities for increasing living space and improving the functionality of your home. The rear double storey extension involves building up and out simultaneously, providing ample room for additional bedrooms, bathrooms, or a larger living area.

To learn more about the various double storey extensions that are suitable for your home, contact us today.

Frequently Asked Questions about Double Storey Extensions

The cost of the project of a double storey extension per square metre is only slightly higher compared to single storeys, and you save a lot of money by expanding multiple floors at once, rather than separate projects down the line.

The cost of multi-storey extensions usually average around £1800/sqm. The cost of your project will naturally vary depending on materials, finishes and the type of design you will choose. However, to summarise, we can say that a standard 4mx5m double storey extension ( with a total of 40sqm gained over the two floors) will cost you around 53£ for the build cost alone. This is without VAT or fees for professionals and interior fitouts.

To give you an idea of the planning and professional fees you will need to take into consideration, these can be summarised as follows:

Architects London average fees 10% / Administration fees: 1% / Structural engineer: 4% / Surveyors: 3% / Contractors:30% / VAT 20% In addition: Planning fees for a residential two storey extension in England is £206. Building control charges depend on your extension’s size. Costs vary between £200 (for 10m sq) to £900 (for 80 to 100m sq).

If you are considering a double storey extension, such as a double storey side extension, to add value and space to your property, you might be able to build under permitted development. However, there are some restrictions to what you can build under permitted development. Your two storey extension can only be built at the rear of your property and it cannot be taller than the highest point of the existing roof or extend beyond the rear wall for more than 3m. In addition the new extension’s materials need to match the ones of the existing building and it needs to be at least 7m from the boundary. The side of your extension will need to be non-opening and obscure-glazed.

Last but not least, if the roof of your new extension connects to the existing roof you will have to subtract the volume of the extension roof from any loft conversion London volume allowance you might have.

Adding footage to your home will certainly boost the value of your property on the market. Research carried out by Nationwide shows how home improvements and home extensions can add significant value to your property. Adding a double bedroom to your house and an en-suite can increase value by 23%.


Steph Fanizza, Architectural Design & Team Manager

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