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To verify planning permission, identify the local planning authority (LPA) for the building, search its planning register by the exact address and map location, then read each relevant decision notice, approved drawing and condition. Compare those documents with the work that exists or that you propose. Also check enforcement records, confirm whether permitted development or a Lawful Development Certificate (LDC) is the legal basis, and ask for building-control records separately. A register entry or an estate-agent statement is not proof that the work is lawful.
This guide is mainly about England because the detailed enforcement and permitted-development sources apply there. Scotland, Wales and Northern Ireland have separate planning systems; use the relevant national guidance and the local authority for the property’s location.
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Which planning authority should you contact?
The LPA responsible for the property’s location is the authoritative starting point for a property-specific answer. GOV.UK says: “To find out if your project will need planning permission, contact your local planning authority (LPA (local planning authority)) through your local council.” Start with the council’s planning service, not a national search engine or a previous owner’s recollection.
For England, use the council’s planning-application and enforcement pages. Confirm the jurisdiction before relying on any result: planning rules and registers differ in Wales, Scotland and Northern Ireland. GOV.UK’s planning-permission guidance links to the appropriate national systems.
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If the site sits near a boundary, check which council covers the actual parcel. A village name, postal town or historic address can point to the wrong authority. A conveyancer, the council’s planning department or the title plan can help resolve an unclear boundary.
How do I search a property’s planning history?
- Collect precise identifiers. Write down the full postal address, postcode, property name or number, and the property’s map location. Keep former addresses, plot numbers and the name of a former farm or estate if the building was redeveloped.
- Search the LPA register. Use the council’s address, postcode and map searches. Search the surrounding street and nearby land as well as the exact address. Older applications may be indexed under a different number, a former house number or a parent plot.
- Review the complete history. Look for the original dwelling, extensions, loft conversions, outbuildings, changes of use, new access, roof alterations, telecommunications equipment and later amendments. A newer application can alter or supersede an earlier scheme.
- Download the documents. Save the decision notice, officer report where available, approved location and site plans, elevations, floor plans, materials schedule, condition discharges and any non-material or minor amendments. Keep a dated copy for your conveyancer.
- Record the status accurately. “Granted,” “refused,” “withdrawn,” “pending” and “prior approval not required” are different outcomes. A pending or withdrawn application gives no consent for the work, and permission for a different design does not legalise what was built.
Registers can be incomplete, especially for older permissions or records transferred between systems. Treat a blank result as a reason to ask the LPA how to search its historic archive, not as proof that no permission exists.
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The decision notice is the starting document, but it must be read with the approved plans and conditions. The notice normally identifies the applicant, site, description of development, decision date and conditions. The plans show the dimensions, position, levels, materials, openings and use that the decision covers.
Make a room-by-room and elevation-by-elevation comparison. Check:
- the building footprint, projection from the original wall and distance to boundaries;
- ridge and eaves heights, roof form, dormers and external stairs;
- window and door positions, obscure glazing or opening restrictions;
- materials, colours, cladding and the treatment of foundations or retaining walls;
- the number of homes, bedrooms or other units and the approved internal arrangement;
- parking, access, cycle storage, landscaping, drainage and tree-protection measures; and
- the approved use, operating hours and any limits on occupation or commercial activity.
Look for later approvals. A condition may require details to be submitted and approved before work starts, before a building is occupied or before a particular phase is used. A condition-discharge decision can be as important as the original grant. A non-material amendment may adjust a drawing without granting a completely new scheme; a material amendment or fresh application may be needed for a substantial change.
Do not rely on a plan that is labelled “proposed” unless the decision notice identifies it as approved. If the register contains several drawing revisions, use the revision referenced in the decision and any subsequent approval.
Does a planning application mean the building has permission?
No. An application record only shows that someone sought consent. You need a valid grant for the relevant development, and the built work must fall within its description, plans and conditions.
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Common traps include a refusal followed by construction, an approval for a smaller extension than the one built, a permission that expired before implementation, or an approval for a change of use that does not cover later alterations. A “prior approval” procedure is also not identical to a full planning grant: the permitted-development right and any prior-approval decision must both be checked.
Where a permission was subject to a time limit or commencement requirement, ask the LPA how implementation is established. Evidence can include building-control records, dated photographs, invoices, utility records or other documents, but the relevant legal test depends on the facts and the type of permission.
Could permitted development cover the work?
Possibly, but permitted development (PD) is conditional rather than automatic. In England, PD rights come from legislation and contain limits on size, height, location, materials, use and timing. Some rights require an application for prior approval, and rights can be removed or restricted.
Check whether the property is listed, in a conservation area or another protected setting, affected by an Article 4 direction, or subject to a planning condition that removes PD rights. A listed building may require listed-building consent as well as planning permission. A conservation-area location can trigger additional controls, while an Article 4 direction can require an ordinary application for work that would otherwise be permitted.
Compare the actual work with every applicable PD limitation: the original house definition, previous additions, rear and side-extension dimensions, eaves and ridge heights, boundary distances, roof volume, materials and the number of storeys. A single earlier extension can reduce the remaining allowance. Ask the LPA whether the claimed PD class applies to this property and scheme.
If the owner cannot identify the relevant PD right and evidence, do not treat “it did not need permission” as established. The LPA can give project-specific guidance, but informal advice is not the same as a formal certificate.
When should you apply for a Lawful Development Certificate?
An LDC is the formal route for deciding whether a specific existing, past or proposed use or operation is lawful. The Planning Portal describes it as a legal document; it is not planning permission for development outside the certificate.
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For an existing extension or use, an applicant must provide evidence supporting the claimed facts, such as the date, continuity and nature of the use or works. The legal time limits and transitional rules are fact-sensitive. The Planning Portal describes different enforcement periods for certain breaches before 25 April 2024 and for certain breaches on or after that date, including ten-year periods for specified newer cases. Do not assume that age alone makes a breach lawful.
For proposed work, an LDC can confirm that the described operation would be lawful, often where PD is relied on. The certificate only covers the plans and description submitted. Moving a window, increasing the footprint or changing the use can put the revised project outside its scope.
| Route | Best use | What it gives you | Limits |
|---|---|---|---|
| Informal LPA enquiry | Clarifying an incomplete history or likely permission requirement | Practical guidance and help locating records | Usually not a binding determination; wording and status vary by council |
| Lawful Development Certificate | Formal confirmation of a described existing or proposed use or operation | A decision document stating lawfulness for that scope | Evidence is required; it does not authorise unrelated development or replace planning permission |
| Planning application | Development that needs permission | Consent for the approved scheme, subject to conditions | It does not retrospectively approve a different scheme or remove building-regulations duties |
Before exchange, ask the conveyancer whether an LDC is needed to reduce a specific title or mortgage risk. An application does not guarantee a certificate; the facts and evidence must satisfy the statutory test.
How do you check for enforcement action?
In England, LPAs maintain an enforcement register containing specified enforcement and stop notices and related orders. Search the council’s enforcement register separately from the application register. Check the site’s address, former addresses, neighbouring plots and any land parcel used for an access or outbuilding.
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Follow up any enforcement notice, breach-of-condition notice, stop notice, prosecution entry or unresolved investigation with the LPA. Read the notice carefully: it identifies the alleged breach, the steps required, the compliance period and appeal rights. A notice may concern a use, an operational development or a failure to comply with a condition rather than the entire building.
No entry is not a guarantee that there is no risk. Registers may not contain every enquiry or historic matter, and an investigation can precede a formal notice. Ask the council to confirm what its search covers and provide the seller’s explanation and documents to the conveyancer.
Do not remove, alter or conceal work to avoid an inspection. If an enforcement issue is live, obtain planning advice before exchanging contracts or spending on renovation.
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What is the difference between planning permission and building regulations approval?
They are separate controls. Planning permission concerns whether development is acceptable in land-use, design, heritage, transport and neighbouring-impact terms. Building regulations approval concerns technical safety and construction standards.
Permitted development may still require a building-regulations application. Ask the seller for the building-control application number, plans, inspection records, completion certificate and any competent-person certificates relevant to the work. A completion certificate does not prove planning permission, and planning permission does not prove that the building complies with regulations.
For a renovation, map both approval tracks before work starts. An extension can need planning permission (or an LDC), building regulations approval, party-wall procedures, drainage consent, tree consent or listed-building consent. These are separate decisions with different authorities and remedies.
How should a buyer handle an apparent discrepancy?
- Stop relying on the marketing description. Photograph and measure the disputed work, noting approximate dates and any signs of later alteration.
- Identify the exact permission. Compare the built form with the approved revision, not merely the application title.
- List the difference. Record changes in footprint, height, openings, materials, use, parking, landscaping and conditions.
- Ask the seller for evidence. Request completion documents, condition-discharge approvals, an LDC, building-control records and invoices or dated photographs that support implementation.
- Ask the LPA a focused question. Provide the application reference, plans and a concise description of the discrepancy. Request the council’s view on the correct route rather than asking for a general “all clear.”
- Refer everything to the conveyancer. The conveyancer can assess contractual protection, indemnity issues, lender requirements and whether an LDC or regularisation route is appropriate.
Do not order a planning indemnity policy or accept a seller’s undertaking as a substitute for understanding the breach. Policies can have exclusions, and contacting an authority can affect availability; obtain independent conveyancing advice before taking that step.
What should you check before planning a renovation?
Define the project precisely before asking whether it needs consent. Include demolition, structural changes, roof volume, windows, external finishes, hardstanding, drainage, changes of use, new units, access and landscaping. “Renovation” can contain several legally separate operations.
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- Confirm the property’s nation, LPA, listing status, conservation-area status and any Article 4 direction.
- Download the full planning history and mark existing permissions, refusals, conditions and expired or superseded schemes.
- Prepare a measured existing plan and a proposed plan that shows dimensions, levels and materials.
- Ask the LPA whether full permission, householder permission, prior approval, listed-building consent or no planning application is the correct route.
- Check building regulations, party-wall obligations, trees, drainage, highways and environmental constraints separately.
- Do not start work until the correct decision is issued and pre-commencement conditions are discharged where required.
For a complex extension, change of use, listed building or incomplete history, a qualified planning professional can interpret the record. Professional advice supplements—not replaces—the LPA’s decision or an LDC.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What records should you give your conveyancer?
Provide the register search results, every relevant decision notice, approved drawings, condition-discharge decisions, amendment approvals, enforcement-register result, LDCs, building-control certificates and the seller’s written explanation. Include a simple timeline showing when each addition or use began.
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Ask the conveyancer to compare the documents with the title plan, estate-agent particulars and the physical inspection. The lender may require evidence that an extension or conversion is lawful. Resolve questions before exchange where possible; a post-completion discovery can leave the buyer responsible for enforcement, remedial work or a future sale problem.
What changes outside England?
Scotland, Wales and Northern Ireland operate separate planning legislation, terminology, registers and enforcement procedures. The core method remains sensible—identify the correct local authority, read the decision and plans, check enforcement and separate building control—but do not transfer England’s PD classes, LDC rules or enforcement periods to another nation.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteUse the relevant national planning guidance and the local authority’s register. If a property crosses an administrative boundary or has a historic planning record, ask the authority which system holds the documents.
Practical verification checklist
- Correct nation and LPA confirmed.
- Exact address, postcode, map position and former addresses searched.
- Original building and every later extension or change of use reviewed.
- Decision notices matched to the correct approved drawings and revisions.
- Conditions and condition-discharge decisions checked.
- Refused, withdrawn, pending and superseded applications excluded from the consented scope.
- PD basis, prior approval, Article 4 direction, listing and conservation-area restrictions checked.
- Enforcement register searched and discrepancies raised with the LPA.
- LDC considered where lawfulness is uncertain.
- Building-control approvals and completion records obtained separately.
- Conveyancer and, where appropriate, a planning professional briefed before exchange or construction.
How we selected these checks
The sequence follows the evidence needed to establish lawfulness: the correct authority, the primary decision documents, the physical comparison, conditions and restrictions, enforcement records, formal certification where necessary, and separate building-control evidence. It distinguishes an informal enquiry from a binding certificate and keeps England-specific rules separate from the other UK nations.
Frequently Asked Questions
Can a solicitor confirm planning permission without contacting the council?
A solicitor can review the documents supplied in the conveyancing file and raise enquiries, but the local planning authority holds the definitive planning record. If the register is incomplete or the work does not match the plans, the solicitor may recommend a direct council response, an LDC or specialist planning advice.
Will a planning indemnity policy make an unauthorised extension legal?
No. Insurance may address certain financial risks under its policy terms, but it does not grant permission or certify the extension. It can also be unsuitable if the authority has already been contacted or enforcement is known, so obtain advice before making an application or notification.
Can I sell a property while an LDC application is pending?
You can market or sell it, but the pending application does not establish lawfulness for the buyer or lender. Disclose the application, its exact scope and any related enforcement or building-control issue, and agree with the conveyancer how the risk will be handled.
What if the planning register’s address search misses an old application?
Ask the LPA to search by map reference, application number, former address, plot name and neighbouring land. Older files may be held in an archive or indexed under a parent site, so preserve the council’s written response and pass it to the conveyancer.
