What is the difference between Full Plans and Building Notice?

Full Plans involves submitting detailed drawings for approval by building control before work starts — you get written confirmation that your plans comply with building regulations. Building Notice means you submit a short notice and start work without pre-approval; the inspector assesses compliance through site visits. Full Plans provides more certainty; Building Notice is simpler but carries more risk of having to alter completed work.

How much does a building regulations application cost?

Fees are set locally and depend on the type and scale of work. A typical householder project (e.g., a rear extension or garage conversion) costs £200–£800 in building regulations fees. A new self-build dwelling costs significantly more. Private approved inspectors charge market rates. Fees cover plan checking and inspection visits.

How long does building regulations approval take for Full Plans?

The building control body has 5 weeks from receipt of a valid Full Plans application to issue a decision. If you agree to an extension, this becomes 2 months. In practice, many councils aim to approve straightforward applications within 2–4 weeks. Complex applications, particularly those requiring structural calculations or SAP energy assessments, may take longer.

Can I use a private inspector instead of the council?

Yes — you can use a Registered Building Control Approver (formerly approved inspector) instead of the council. Private inspectors must be registered with the Building Safety Regulator and operate to the same standards as council building control. Many builders and developers prefer private inspectors for speed and flexibility. However, if a dispute arises, the council has powers to intervene.

What happens at the final building regulations inspection?

At the final inspection, the building control officer carries out a thorough check that all work complies with the approved plans and building regulations. They check structural elements, insulation, drainage, electrical installations, ventilation, and fire safety measures. If everything is satisfactory, they issue a completion certificate. If defects are found, you must remedy them before the certificate is issued.

How to Submit a Building Regulations Application

Submitting a building regulations application is the formal way to notify your local authority (or an approved inspector) that you intend to carry out building work. There are two main routes: Full Plans, where you submit detailed drawings for approval before starting, and Building Notice, where you start work sooner and an inspector assesses compliance during the build.

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