Frequently asked questions

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March 2016

ISBN: 978-1-4098-4803-5

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Timber sizes for floor joists 4

How do I go about applying for Building Regulations Consent in retrospect? 4

Single storey extension foundations 5

Can you tell me if a conservatory can be erected on top of a first floor extension? 5

This has happened on a property near us and consequently we have lost our privacy. 5

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Where can I obtain the timber sizes for floor joists and roofing members that are no longer directly contained in the current version of Approved Document A?

This information is contained in the guidance document published by the Timber Research and Development Association (TRADA) titled:- ‘Span tables for solid timber members in floors, ceilings and roofs (excluding trussed rafter roofs) for dwellings’, obtainable from: TRADA Technology Ltd, Chiltern House Stocking Lane Hughenden Valley High Wycombe Buckinghamshire HP14 4ND

Or alternatively technical guidance is given in British Standard BS 8103 Part 3 2009 ‘Structural design of low-rise buildings – Code of practice for timber floors and roofs for housing’, obtainable from: British Standards Institution 389 Chiswick High Road London W4 4AL

How do I go about applying for Building Regulations Consent in retrospect?

I have recently moved into a three bedroom house which has had a loft room constructed. Building Regulations Consent was not obtained before doing this work though we are informed that the works conform to the required standards. How do I go about applying for Building Regulations Consent in retrospect? I know that planning permission was not required.

You will need to contact your local authority Building Control office and apply for a Regularisation Certification for this 'unauthorised building work'. This could be very disruptive as some of the covered building work may need to be exposed, e.g. to verify the size of a steel beam or the spacing and size of floor joists.

What needs to be done to create a basement in an existing or new house?

Basements require both Planning Permission and Building Regulations approval whether constructed as part of a new property or as a retrofit to an existing property. You will need to consult your Local Authority Planning and Building Control offices

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