Planning permission and building regulations: two different questions
An England-focused starting point for understanding which questions to ask, what information to gather and why one approval does not stand in for another.
Identify the planning question
A new building, a significant extension or a change of use may raise a planning-permission question. The answer depends on the particular property and proposal. Start by identifying the local planning authority and collecting the existing plans, the intended changes and the planning history. Ask which route is relevant before treating an early idea as something that can be built. This guide is a starting point for England; the systems elsewhere in the UK need separate guidance. A short online checklist can organise your questions, but cannot confirm the status of a specific proposal.
Treat permitted development as conditional
Some house extensions can fall within permitted-development rights when the relevant conditions and limits are met. This is not a blanket exemption for every home. Planning Portal notes that its house-extension guidance does not apply in the same way to flats and maisonettes, and that previous extensions and restrictions can matter. Record what is known about the original building and later changes, then seek advice on the complete proposal. A neighbour’s extension or a similar image online is not evidence that the same route is available to your property. Keep unresolved conditions visible in the brief.
Ask the building-regulations question separately
Building regulations approval is a separate consideration from planning permission, and a project may need both. GOV.UK explains that construction, extensions and many alterations can be covered. Work to electrical systems, windows, heating or plumbing may also require checks even when the visible change seems modest. Discuss the actual scope with the appropriate building-control body and relevant qualified specialists. Do not assume that a planning drawing resolves the technical design. Record who will prepare the required information, coordinate the specialists and arrange the necessary checks before setting a construction programme.
Build a project-specific checklist
Bring the separate questions together in one record: the proposed work, the information already available, the decisions still needed and the person responsible for each next step. Property-specific matters, specialist assessments and other permissions may need to be checked alongside the planning and building-regulations routes. Allow time to establish what applies instead of relying on a generic programme. Keep correspondence and the relevant documents with the project record. The useful outcome is clarity about what must be investigated and who will investigate it, rather than an unsupported promise that approval will be straightforward.
Zink field notes · 23 October 2026 · General project guidance; the brief and site conditions need individual review.