Two-storey extensions case studies:
Those seeking to substantially increase the floor space of their home may wish to extend out at both ground and first-floor levels.
While extending two storeys simultaneously certainly presents challenges, it can be an effective way of increasing bedroom and bathroom provision while also enhancing living and kitchen space.
From a design perspective, there are a number of challenges for the architect.
A two storey extension is often a bulky addition to a house so careful consideration needs to be given to integrating the new extension with the existing property roof in such a way as to not dominate and give an appearance of belonging.
Materials can either match the main building or offer contrast. Contemporary and traditional styles are equally valid so long as the new and old sit together harmoniously
And when extending a home on two storeys rather than just one, greater consideration needs to be given to impact on neighbouring properties, especially when it comes to privacy and the right to light.
Even with two storey extensions, “deemed consent” (or permitted development) can still apply in some instances.
As with some single-storey projects, current law allows for some two-storey extensions to be built without the need to obtain planning consent: this is called “deemed consent.”
These extensions must satisfy certain conditions in terms of size and height, and proximity to neighbouring boundaries.
But even without planning consent it is still necessary to obtain a lawful development certificate.
This takes the form of formal agreement from the local authority confirming that planning consent is not necessary.