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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallPlanning permission and building-regulations approval are separate checks. Planning permission asks whether a development is acceptable in its location; building-regulations approval asks whether applicable construction and safety standards will be met. A project can need planning permission, building-regulations approval, both, or neither.
This guide uses the UK terms and official process described for England and Wales. “Building permit” is used here as the closest equivalent to building-regulations approval; terminology and procedures differ in Scotland and Northern Ireland. Always confirm the position for the nation, site and project concerned.
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The difference in one table
| Question | Planning permission | Building-regulations approval |
|---|---|---|
| What it decides | Whether the proposed development is acceptable in this location. | Whether the design and construction comply with applicable technical, structural, health, safety, energy and accessibility requirements. |
| Typical trigger | New buildings, substantial extensions or external changes, and changes of use. | Construction, extensions and alterations that affect matters regulated by the building regulations. |
| Key constraints | Local planning policy, permitted-development rights, conservation-area or listed status, and other site-specific restrictions. | The technical requirements that apply to the work, together with any exemption or competent-person route. |
| Who decides | The local planning authority (LPA). | A building control body: the local-authority building-control service or, where available, a private registered building control approver. Certain higher-risk building work in England follows the Building Safety Regulator route. |
| Can an exemption replace the other approval? | No. Permitted development is a planning route only. | No. A building-regulations exemption or competent-person certification does not grant planning permission. |
GOV.UK puts the relationship plainly: “Building regulations approval is different from planning permission. You might need both.” Treat that as a warning against assuming one approval covers the other.
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What planning permission controls
Planning law controls the effect of development on its surroundings and the way land is used. The LPA considers the proposal against the development plan and other material considerations for that site. The question is not whether the construction is technically safe; it is whether the development is acceptable there.
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Planning is concerned with matters such as the building’s position, scale, appearance, relationship to neighbours, effect on the surrounding area and the proposed use of land or buildings. A technically well-designed extension can still be unacceptable in its location. Conversely, planning permission does not confirm that the structure, fire precautions, drainage or insulation meet building regulations.
Projects that commonly need a planning check
- A new house, outbuilding or other building.
- An extension or other major change to the outside of an existing building.
- A material change of use, such as converting a dwelling to a different use or changing the use of land.
- Development in a location with special controls, including conservation areas, listed buildings, protected trees or other local restrictions.
These are screening categories, not automatic decisions. The LPA makes the project-specific determination, and the same physical work can have a different answer on another site. Previous permissions, conditions attached to them, the building’s history and local designations can all affect the result.
Permitted development is a planning route
In England, permitted-development rights can allow eligible work without a planning application. Eligibility depends on the type and size of the proposal, its history and the site. Conditions and limitations still apply, and a property may have had those rights removed or restricted.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsPermitted development is not an informal exemption and it is not a guarantee that the work is lawful merely because it is small. Check the detailed limits and conditions before relying on it. If the position is uncertain, ask the LPA for written confirmation; a lawful-development decision can provide useful evidence of the planning status later.
Not needing a planning application does not mean that every other consent is unnecessary. A permitted-development route does not override listed-building consent, protected-tree controls, advertisement consent, hazardous-substances consent, environmental permits or licences, or other regimes that apply to the site or activity. Obtain written confirmation from the LPA when the position is uncertain; a lawful-development decision may be important evidence later.
What building-regulations approval controls
Building regulations govern how applicable work is designed and built. They cover regulated technical matters rather than the planning merits of the location. Depending on the work, this can include structural stability, fire safety, moisture, ventilation, sanitation, drainage, energy performance, conservation of fuel and power, access and electrical safety.
The focus is the completed work and the way it is constructed, not whether the project is attractive or appropriate for the neighbourhood. Requirements can apply when an existing building is altered, even if its footprint stays the same. They can also be relevant to replacement or installation work that a homeowner might otherwise regard as routine maintenance.
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Work that should prompt a building-regulations check
GOV.UK examples include construction and extensions, certain electrical and plumbing work, fixed air-conditioning, replacement windows and doors, roof coverings and heating systems. The exact requirement depends on the work and whether an exemption or certification scheme applies. Alterations to an existing building can be regulated even when the building’s footprint does not change.
Building-regulations approval does not assess whether an extension is acceptable in a conservation area, whether a change of use is lawful or whether neighbours’ planning interests have been considered. Conversely, a planning decision does not certify the design’s structural calculations, fire precautions or insulation performance.
Exempt work and competent-person schemes
Some classes of work are exempt from the building regulations, and approved competent-person schemes allow registered installers to self-certify specified work. The exemption or scheme is limited to the work and conditions defined by the regulations; it is not a blanket exemption for the property or the contractor.
If you rely on a competent person, keep the certificate issued for the completed work. If you are unsure whether an exemption applies, ask a building control body before starting. Do not treat a contractor’s informal assurance as proof that approval is unnecessary. Ask exactly which part of the work is covered and what evidence you will receive when it is complete.
Do you need planning permission, building approval, or both?
Use this as an initial screen, then confirm with the relevant authority. “Likely” is not a decision: site designations, previous permissions, conditions and the detailed specification can change the result.
| Example project | Planning check | Building-regulations check | Why |
|---|---|---|---|
| New detached building | Likely | Likely | It is new development and construction work must meet applicable technical standards. |
| House extension | Likely, unless lawful permitted development applies | Likely | The external enlargement is a planning issue; the new structure and altered building are technical work. |
| Internal alteration with no material change of use | Often not, but verify | May be required | Structural, fire-safety, drainage, ventilation or other regulated changes can trigger building control. |
| Change of use | Likely | Possibly | The use may require planning permission, while the resulting works or performance standards may require building approval. |
| Replacement windows or doors | Usually no new planning application, subject to restrictions | May be regulated | Replacement work is one of the examples for which building-regulations requirements can apply. |
| Roof covering replacement | Usually no new planning application, subject to site controls | May be regulated | Roof work can affect regulated performance and must be checked independently of planning. |
| Fixed air-conditioning or heating-system work | Usually not solely because of the installation, but site and external-equipment constraints may matter | May be regulated | GOV.UK identifies fixed air-conditioning and heating systems among work that may need building-regulations approval. |
For many extensions and developments, the practical answer is “check both.” Start the two enquiries separately rather than waiting for one authority to refer you to the other. A planning application or decision does not automatically notify building control, and a building-control application does not ask the LPA to assess the development.
A step-by-step way to establish the approvals
- Define the work precisely. Record the address, existing and proposed use, dimensions, floor areas, height, distances to boundaries, materials, structural changes, drainage, services and whether the work affects a listed or historic building. Include photographs and note any previous permissions or conditions.
- Check the planning position with the LPA. Ask whether the proposal is development requiring permission, whether permitted-development rights apply, and whether conditions or local designations create additional controls. Include the site plan and photographs if requested.
- Check building regulations with a building control body. Describe every element of the work, including structure, fire precautions, insulation, ventilation, drainage, electrical or plumbing alterations and fixed systems. Ask whether the work is exempt, requires an application or can be self-certified by a competent person.
- Identify the correct building-control route. For work that is not higher-risk, England and Wales provide a local-authority building-control route or a private registered building control approver route. In England, certain higher-risk building work must be approved by the Building Safety Regulator before work starts, subject to the exceptions in the official guidance.
- Check additional consents. Ask about listed-building consent, protected-tree controls, conservation-area restrictions, advertisement consent, hazardous-substances consent and environmental permits or licences where relevant.
- Obtain decisions or certificates before starting. Keep planning decisions, lawful-development evidence, building-control approval, inspection records and competent-person certificates with the project file.
- Keep the built work aligned with the approved information. If the size, position, appearance, use or technical design changes, ask the relevant authority whether an amendment, revised application or additional approval is needed before proceeding.
Who to contact and what to ask
Local planning authority
The LPA is the first contact for planning permission. Give it the exact address, a clear description of the existing and proposed development, scaled drawings or dimensions, the proposed use, and information about listed status, conservation areas, protected trees or other constraints. Ask whether you need a planning application, whether permitted development could apply, and whether a separate consent is needed.
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A planning consultant can help interpret policy and prepare a project-specific strategy, but the LPA remains the authority that determines the planning position. A consultant’s view is not a substitute for a required permission or formal confirmation. If you use one, give the consultant the same complete site and design information you provide to the authority.
Building control body
Contact building control before work begins, especially where walls, floors, roofs, structure, fire separation, drainage, ventilation or energy performance will change. Explain whether the project is new construction, an extension, an alteration, a change of use or replacement work. Ask which application route and drawings are required, what inspections will take place and whether any part can be certified through a competent-person scheme.
For higher-risk building work in England, ask whether the Building Safety Regulator route applies before you commit to a start date. Do not assume that a local authority or private approver can accept work that must go through the regulator. The higher-risk route is specific to England and should not be generalized to every project or UK nation.
How the two decisions interact during design and construction
Resolve planning constraints early because they can change the building’s size, position, appearance or use. Then develop the technical design for building control. A planning condition can require a particular material or layout, while building regulations can require details such as fire resistance or insulation; the final design must satisfy both sets of requirements.
Keep the approved design aligned with the work on site. A planning permission may contain conditions that must be discharged before a particular stage, and building control may require inspections or evidence as construction progresses. If the design changes, ask the relevant authority whether an amendment, revised application or additional approval is needed before carrying out the change. Never assume that a minor-looking change is automatically outside both regimes.
Jurisdiction and terminology limits
The planning guidance discussed here is explicitly for England and Wales in the cited material, while the building-regulations guidance directs readers in Scotland and Northern Ireland to separate rules. Scotland and Northern Ireland have their own legislation, authorities, forms and approval routes. Even within England and Wales, the answer depends on the site, the building’s status and the detailed proposal.
If your project is outside England or Wales, identify the nation first and contact its planning authority and building-control service. Do not assume that “planning permission,” “building warrant,” “building permit” or “building regulations approval” describe the same legal process everywhere. Even familiar words can refer to different applications, certificates or decision-makers.
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What can happen if you proceed without required approval?
Planning consequences
Carrying out development without required planning permission can lead to enforcement action. GOV.UK explains that an enforcement notice may require the recipient to undo changes. The outcome depends on the facts and the authority’s decision, but the possibility remains even after work is complete.
Building-regulations consequences
Building-regulations non-compliance can lead to prosecution, fines or a requirement to correct faulty work. You may also lack the compliance certificates needed to demonstrate the property’s status when selling. These are potential consequences, not automatic results, but discovering the problem after construction is usually more disruptive and expensive than checking before work starts.
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Sales, insurance and future alterations
Keep every approval, completion certificate, inspection record and competent-person certificate. A future buyer, conveyancer, insurer or lender may ask for evidence that work was authorised and completed in accordance with the applicable rules. Missing paperwork can delay a transaction or require retrospective steps, even where the physical work appears sound. Retrospective action is not a substitute for checking the required route before construction.
Common misunderstandings to avoid
- “Planning permission means the design is safe.” It does not; technical compliance is a separate building-regulations question.
- “Building control approval means the extension is lawful.” It does not establish planning permission or permitted-development status.
- “Permitted development means no permissions are needed.” Other consents, including listed-building, tree, advertisement, hazardous-substances or environmental controls, may still apply.
- “A contractor said approval is unnecessary.” Ask the relevant authority or obtain the specified competent-person certificate instead of relying on an informal statement.
- “The same answer applies to every property.” Site history, designations, conditions and the exact work can change the outcome.
A practical pre-start checklist
- Confirm the project’s nation and the correct authorities.
- Describe the existing and proposed use, not just the building work.
- Check whether the site is listed, in a conservation area, affected by protected trees or subject to another designation.
- Ask the LPA about planning permission, permitted development and other consents.
- Ask building control about regulated work, exemptions, competent-person certification and the application route.
- Check whether higher-risk building rules apply in England.
- Do not start work that requires approval until the required decision or route is in place.
- Store certificates and approved drawings so they remain available for completion, maintenance and any later sale.
The safest working assumption is not that one approval covers everything, but that planning and building control are two independent questions. Verify each one for the exact project before construction begins.
Frequently Asked Questions
Can I have building-regulations approval without planning permission?
Yes, where the work needs building control but does not amount to development requiring planning permission. Building-regulations approval only addresses technical compliance; it does not grant planning permission or confirm permitted-development rights.
If my extension is permitted development, do I still need building control?
Usually you still need to check building regulations. Permitted development is a planning route, while the extension’s structure, fire safety, insulation, drainage and other regulated matters are separate questions.
Who decides whether planning permission is needed?
The local planning authority for the site. A planning consultant can advise, but the authority’s project-specific decision or written confirmation is what establishes the planning position.
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Who approves building regulations?
For non-higher-risk work in England and Wales, use the local-authority building-control service or a private registered building control approver where available. Certain higher-risk building work in England must use the Building Safety Regulator route before work starts, subject to the official exceptions.
Do replacement windows, doors or a new heating system need approval?
They can. GOV.UK lists replacement windows and doors, heating systems and fixed air-conditioning among work that may be subject to building-regulations requirements. Planning restrictions may also apply on a particular site, so check both where appropriate.
What if a competent installer says no building-control application is needed?
Ask whether the installer belongs to an approved competent-person scheme and what certificate will be issued. The scheme covers only specified work and conditions; keep the certificate and ask a building control body if anything is unclear.
What other consents might apply even when planning permission is not required?
Depending on the site and activity, you may need listed-building consent, protected-tree approval, advertisement consent, hazardous-substances consent, environmental permits or licences, or another separate consent.
What are the risks of starting first and checking later?
Planning breaches can lead to enforcement action, including a notice requiring changes to be undone. Building-regulations non-compliance can result in prosecution, fines or corrective work, and missing certificates can complicate a future sale.
The Bottom Line
Check planning permission and building regulations independently. Planning permission governs whether the development is acceptable in its location; building-regulations approval governs how applicable work is designed and built. Many projects, especially extensions and new buildings, need both. Confirm the position with the local planning authority and the appropriate building control body before work starts, and check any additional consents for the site.
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