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Planning permission and building regulations approval are different approvals. Planning permission asks whether a proposed development is acceptable in its location—considering land use, appearance, access and effects on neighbours or the environment. Building regulations approval asks whether the work is designed and constructed to required standards for matters such as structure, fire safety, insulation, energy use and accessibility.
In UK guidance, “building permit” is not usually the formal name for the second process. The closest UK terms are building regulations approval and building control. A single project can need both permissions, neither approval replaces the other, and the exact answer depends on the nation, local authority, property and work proposed.
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The short answer: two tests, two processes
Planning permission controls what development may take place and whether it is acceptable in planning terms. Building regulations control how the work is designed and built so that it meets construction standards. They may be handled by different authorities and produce different decisions.
| Reader question | Planning permission | Building regulations approval |
|---|---|---|
| What is assessed? | Whether the proposed development is acceptable in planning terms, including land use, appearance, access and impact on neighbours or the environment. | Whether construction complies with required standards, including structure, fire safety, insulation, energy use and accessibility. |
| What does a decision do? | Allows development to proceed subject to applicable conditions and rules. | Provides approval or checking of construction details against building standards; the route and evidence depend on the project. |
| Can both be required? | Yes. Many projects require a separate planning process as well as building regulations approval. | Yes. Building regulations approval does not establish that planning permission has been granted. |
| Who should confirm the position? | Your local planning authority, including whether permitted development rights or local restrictions apply. | Your building control body or other authority designated for the project and nation. |
The distinction is summarised by Dartmoor National Park Authority this way: planning permission controls what you can build, while building regulations control how you build. GOV.UK likewise states that building regulations approval is different from planning permission and that you might need both.
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Why “building permit” can be a misleading term
Terminology changes between countries. In the United States and some other jurisdictions, a “building permit” is commonly the approval used to check construction work. In the UK, official guidance generally refers instead to building regulations approval, building control and, for certain proposals, planning permission. Treating the labels as interchangeable can send an applicant to the wrong authority or lead them to assume one approval covers both issues.
This article uses the UK distinction because that is where the clearest guidance for this comparison applies. England, Scotland, Wales and Northern Ireland do not share every rule or application route. If your property is outside the UK, use your local authority’s definitions rather than importing the UK terms or assuming that a US-style “building permit” has the same legal effect.
What planning permission decides
Land use and the principle of development
Planning permission considers whether development is acceptable in its setting. That can include a new building, an extension, a material change in use or another form of development that planning rules regulate. The question is not whether the proposed structure can be made safe; it is whether the proposed development is appropriate on the land and in the surrounding area.
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Planning considerations can include the appearance of a building, how people and vehicles reach it, and effects on neighbours or the environment. A proposal may therefore raise planning issues even when its construction details are sound. Conversely, a proposal that is acceptable in principle can still need changes to its technical design to satisfy building regulations.
Conditions and local restrictions
A planning decision may allow development subject to conditions and other applicable rules. The local planning authority can identify site-specific constraints and restrictions. The property’s location, its planning history and any designation affecting it can change the answer, so a decision for a nearby address is not proof that your project has permission.
Permitted development in England
In England, permitted development rights are a national grant of planning permission for certain works and changes of use, provided the proposal meets the relevant conditions and limitations. They can mean that a separate planning application is not required for an eligible project. They do not remove the need to check building regulations, and they do not guarantee that every property can use the rights.
Local planning authorities may remove permitted development rights in specific cases. Before relying on them, ask the local planning authority to confirm that the rights apply to your property and the exact work proposed. A project can also be affected by other controls, so “permitted development” should not be read as “free from all approvals.”
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What building regulations approval decides
Construction standards rather than land-use policy
Building regulations approval is concerned with the technical way work is designed and built. The standards cover subjects such as structural stability, fire safety, insulation, energy use and accessibility. The process is intended to check that the building work meets those requirements; it does not decide whether the development belongs on the site or whether its appearance is acceptable to the planning authority.
Work that can fall within building regulations
GOV.UK guidance identifies construction and extensions, as well as some alteration work, as potentially subject to building regulations. Examples include certain electrical work, plumbing, replacement windows or doors, heating systems and roof coverings. These examples are not exhaustive, and the exact requirements depend on the nature of the work and the building. Ask a building control body for a project-specific answer before starting.
Building control and evidence
A building control body checks the proposal and the work against the applicable standards. The authority or approved body may require drawings, specifications, inspections or other evidence appropriate to the project. The required route and evidence are not identical for every building, so do not assume that paperwork used on an earlier job will be sufficient for a new one.
Why one project may need both approvals
Consider an extension. Planning permission may be needed to establish that the enlarged building is acceptable in its location, including its appearance, access and effect on neighbours. Building regulations approval may then be needed to check the extension’s structure, fire safety, insulation, energy performance and accessibility. Passing one test says nothing conclusive about the other.
The same separation applies when the work changes a building’s use, alters its external appearance or involves substantial construction. A project can be lawful in planning terms but fail to meet construction standards, or meet technical standards while lacking permission for the development itself. Starting work on the assumption that approval from one authority automatically satisfies the other is a common and costly mistake.
How to work out what your project needs
- Identify the nation and local authority. Confirm whether the property is in England, Wales, Scotland or Northern Ireland and identify the local planning authority and the appropriate building control body. Rules and application routes are not uniform across the UK.
- Describe the work precisely. Record what will be built, removed, extended or converted; how the building will be used; and whether the work affects structure, fire safety, insulation, energy use, accessibility, services, windows, doors, heating or the roof. Vague descriptions produce unreliable answers.
- Ask the planning authority about planning permission. Check whether the proposal needs a planning application, benefits from permitted development rights in England, or is affected by a local restriction or site designation. Request confirmation for the actual property and proposal, not just a general answer about a similar project.
- Ask building control about building regulations. Explain the construction and alteration work and ask which approval route and evidence apply. Building regulations can apply even when planning permission is not required.
- Check whether both processes are separate. If both authorities identify a requirement, treat them as two applications or approval processes. Coordinate the information so that drawings and specifications describe the same proposal, but do not combine the legal decisions.
- Obtain the relevant decisions before starting work. Keep written approvals, conditions, plans and any inspection or completion records. If the work has already been carried out, ask about the route for dealing with unauthorised or historic work rather than assuming it can be retrospectively accepted.
Building regulations application routes in the UK
GOV.UK’s building-regulations application guidance describes different routes, and the correct route depends on the project and the building.
Full plans
A full-plans application is a route in which detailed plans and supporting information are submitted for checking before work proceeds. It is commonly considered where the design is sufficiently developed for a detailed review. The building control body can explain what it expects for your project and whether this route is appropriate.
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Building notice
A building notice is described for smaller projects. It can be suitable where the work is straightforward, but it does not remove the obligation to comply with the building regulations. The building control body still needs enough information to carry out the required checks and inspections.
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Regularisation is a route for certain work that has already been carried out without the required building-regulations approval. It is not a substitute for planning permission and is not an automatic amnesty. The building control body will explain whether the work is eligible and what evidence, opening-up or remedial work may be required.
Higher-risk buildings
The GOV.UK application guidance distinguishes routes for higher-risk buildings from routes for other buildings. Do not apply a small-project process to a higher-risk building without confirming the correct procedure with the designated authority. The definition of a higher-risk building and the responsible body are matters to verify for the specific project and current rules.
England, Scotland and Northern Ireland: do not assume the route is identical
GOV.UK guidance notes separate rules for Scotland and Northern Ireland. England’s permitted development rights are an England planning concept and should not be presented as a UK-wide exemption. Wales also has its own planning and building-regulations framework.
Before relying on an online checklist, confirm the current national rules and the local authority responsible for the site. A form, approval name or threshold used in England may not be the correct form or threshold elsewhere. If you are dealing with a cross-border portfolio, handle each property according to its nation and local authority rather than applying one internal rule to all sites.
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Common project situations and the question to ask
An extension or new outbuilding
Ask the planning authority whether the proposal needs planning permission or qualifies under permitted development rights in England. Separately ask building control how the structure, fire safety, insulation, energy use and accessibility will be checked. The planning answer does not settle the technical answer.
Changing a building’s use
A change of use can raise a planning question about whether the new use is acceptable in that location. It can also trigger building-regulations work because the altered use may affect escape, fire safety, structure, accessibility, energy performance or services. Obtain both authorities’ views before committing to the conversion.
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Replacing windows or doors
Replacement windows or doors are among the examples of alteration work that may fall within building regulations. Planning controls can also matter where the external appearance or a local restriction is involved. Check both regimes instead of treating replacement as automatically exempt.
Electrical, plumbing or heating alterations
Certain electrical work, plumbing and heating-system work may be covered by building regulations. These jobs may have little effect on planning matters, but that does not remove the need for the appropriate building-control check. Ask which parts of the proposed work are within scope.
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Roof coverings are another example identified in GOV.UK guidance as potentially subject to building regulations. If the work changes the building’s form or appearance, planning considerations may arise as well. Describe both the technical work and the external change when seeking advice.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What each authority can and cannot tell you
- Local planning authority: whether the development is acceptable in planning terms, whether a planning application is required, whether permitted development rights may apply in England, and whether local restrictions affect the site.
- Building control body: which building-regulations approval route and technical evidence apply, and how compliance will be checked during the work.
- Neither authority: can make the other authority’s approval unnecessary. A planning officer does not grant building-regulations approval, and a building-control decision does not grant planning permission.
For complex proposals, Ipswich Borough Council advises contacting both planning and building control. That is practical advice even where the two conversations happen in a different order: obtain both views early enough to change the design before construction begins.
Mistakes that create avoidable risk
Calling one approval a “permit” and assuming the label settles the issue
Use the formal terms used by your authority. In the UK, ask specifically about planning permission and building regulations approval. If you use “building permit,” explain the work and ask the officer to identify the equivalent process.
Relying on permitted development without checking conditions
Permitted development rights are conditional and limited. Local planning authorities may remove them in specific cases. Verify the address, proposal and current restrictions before ordering materials or beginning work.
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Planning permission does not certify the construction. Contact building control separately, including for alteration work such as services, windows, doors, heating or roof coverings that may fall within building regulations.
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Applying for building regulations approval and assuming the use is lawful
Building control checks construction standards. It does not decide whether the proposed use, size, appearance or impact is acceptable in planning terms. Ask the planning authority as well.
Using a past project as a precedent
A neighbour’s approval, an old drawing or a previous decision may involve different facts, rules or property restrictions. Treat it as background information only and obtain a current, project-specific answer.
Starting before the route is confirmed
Early construction can make inspection, redesign or retrospective approval more difficult. Confirm the required processes and retain the written decisions and conditions before work starts.
Information to prepare when you contact the authorities
Clear information helps both authorities answer the actual question rather than a simplified version of it. Prepare:
- The property address and nation.
- A plain-language description of the existing building and proposed work.
- The intended use of each affected space or building.
- Whether the work changes the footprint, height, external appearance, access or relationship with neighbouring property.
- Whether it affects structure, fire safety, insulation, energy use, accessibility, electrical systems, plumbing, windows, doors, heating or roof coverings.
- Any known planning designation, restriction or previous approval affecting the property.
- Drawings or specifications when available, making clear which parts are existing and which are proposed.
Ask the planning authority and building control body to state what you must submit, which route applies and what conditions or inspections will follow. Requirements can change with the project and jurisdiction, so avoid relying on a generic form downloaded for another type of work.
When professional help is worthwhile
A straightforward project may be clarified directly with the local planning authority and a building control body. A more complex proposal—such as a substantial extension, conversion, unusual structure, change of use or work involving a higher-risk building—can involve interacting design, planning and technical questions. In those cases, an architect, surveyor, planning consultant or building-regulations professional can help coordinate the information. Their involvement does not guarantee permission or compliance; the relevant authorities still make the formal decisions.
Bottom line for a UK project
Ask two separate questions before work starts: Is the development acceptable and authorised in planning terms? and Will the work comply with building regulations? The first is answered through the local planning system; the second through building control or the designated building-regulations route. In England, permitted development rights may answer the first question for some works, subject to conditions and local restrictions, but they do not answer the second. Confirm both positions for the property, nation and exact proposal.
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