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Double Storey Extension

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Why choose a Double Storey Extension?

Opting for a double 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 one as whichever option you choose, you only need one roof and set of footings. Hence the reason of getting more value from your build and that extra space for bedrooms or bathrooms you require.

There are many options for where to have your extension built, the rear is normally the best location. Keep in mind not to take too much away from your garden but if you have land to the side of your property this works well with many designs.

Before you start 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 you existing property.

Featured Case Study:
Smart double storey extension in Kingston

This client asked us to create a double storey extension and loft conversion for him.

By selecting us for his project, our client was able to enjoy 3 great new living spaces for his family. In addition, the value of his property has significantly increased.

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More Double Storey Extension Projects


double storey rear extension image on blog re double storey rear extension ideas

Double Storey Rear Extension in Banstead, London

Extension architecture were instructed to design a Double Storey Extension to a detached house in Banstead. Our team created a rear extension to enlarge the dining / kitchen area, a new utility room with skylight, larger windows and bi-folding doors to maximise natural daylight. 

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additional storey side elevation for article on double storey rear extension in islington

Double Storey Rear Extension in Islington, London

Much of Islington is made up of conservation areas, so there needed to be a Design and Access Statement submitted in support of the application, as in every application in conservation areas. Our team has planning consultants as well as architectural designers, who can help you to make a strong application. 

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50+ PROJECTS
COMPLETED

To date, we have completed more than 90 projects, including single and double storey extensions, flat conversions, change of use, new builds and more.

To see more of our work on double storey extensions, visit our ideas page below.

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HOW MUCH DOES A DOUBLE STORY EXTENSION COST?

  • This all comes down to your location, project size and final fixtures and fitting you want for your new two storey extension.
  • Costs that you can expect are those of tradesmen and labour, materials and planning fees.
  • To get quotes from builders they will need a set of plans for the build and at Extension Architecture we can offer you a free quote for plans.
  • Once you have your plans, aside from the actual build cost you will need to budget for the non build fees.
  • These include any party wall agreements you may need, application fees for your planning and building control charges.
  • Other cost that should be factored in are if you require a project manager, structural engineer or any survey costs.
  • The time of year can also play a factor in to the overall cost of a two storey extension with summer being the prefered option.
  • Once the ‘cut through’ from the new build to your home has been done you will have cold spots making the overall temperature drop meaning more heating costs.
  • Building work can be delayed by bad weather with bricklayers being ‘rained off’ and roofers unable to work in adverse conditions.
  • This will prolong the extension build and if you have electrical and other tradesmen booked in, they may need take other work until you are ready meaning finding last minute tradespeople.

New Build Epsom Flats

Double Storey Case Study In London 2019

New Build Epsom Flats

3D Double Storey Case Study

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