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Already Have Planning Permission?
For those who can proceed under Permitted Development or who have already obtained Planning Permission, we are pleased to offer our services in preparing a Full Plans Building Regulations Package which can then be submitted to the local authority for approval and utilised to obtain quotations from prospective builders.
We are happy to supply Structural Calculations for your project if you have everything else arranged elsewhere - please contact us for details.
When adding an Extension to your property, there is a 'rule-of-thumb' for calculating the maximum area of openings (Doors, Windows and Roof Windows) you are allowed - 25% of the newly created space plus any areas covered by the Extension. This is covered by Part L of the Building Regulations Approved Documents and uses the CO2 emissions from the proposed Extension as its guide.
What happens if you require more than this allowable area? The solution lies in modelling the proposed Extension in specialised software which will produce CO2 emissions figures for the 'idealised' Extension and the actual design you require. By adjusting the build specification including Insulation types and thicknesses, the CO2 emissions can be reduced which results in an increase in the allowable area of openings allowed.
Other solutions would include; upgrading the Insulation in the existing structure or/and fitting a more efficient form of space heating (e.g. new modern Condensing Boiler).
The following links may provide additional information to assist you in researching for your proposed development:
Contains information relating to both Planing and Building Regulations.
A guide to what can and cannot be built without Planning Permission.
The statutory body responsible for the protection of Historic Buildings in England.
The statutory body responsible for the protection of Historic Buildings in Wales.
The Society for the Protection of Ancient Buildings.