How to Find the Full Planning History for a Property

There is no single national list of planning decisions in the UK. A property's planning history is split across three separate systems — the council's own statutory register, a national open dataset that its publisher currently labels incomplete, and the Planning Inspectorate's appeal records — and none of them is a complete answer on its own. The part most people actually search, the council's online planning register, only reaches back as far as that authority computerised — among the three councils checked for this guide, that start date ranges from 1990 to 2011. Everything older usually sits on microfiche or in an off-site paper archive.

This guide covers where each kind of record lives, what it costs to get the ones that are not online, what a planning register is legally obliged to contain, and the fact most buyers misread: an absence of applications is not evidence that anything was built unlawfully. It applies to England and Wales — Scotland and Northern Ireland run separate planning systems with their own registers.

The three places planning records actually live

1. The council planning register — the only one that is statutory

In England, article 40 of the Town and Country Planning (Development Management Procedure) (England) Order 2015 requires every local planning register authority to keep a register of applications, in two parts. Part 1 holds applications not yet finally disposed of. Part 2 holds the record of every application, including a copy — which may be photographic or electronic — of the application itself and the plans and drawings submitted with it, plus the decisions, directions and modifications that followed. Certificates of lawfulness and prior approval applications go on the register too. The register must be kept at the authority's principal office (or somewhere convenient to the relevant part of its area), and may be made available on a website.

That is the whole of the legal duty, and it is worth being precise about its limits. The register records applications. It does not record development that never needed an application, it does not prove that what was built matches what was approved, and it is not a title document. Government guidance on lawful development certificates puts it bluntly: while authorities are statutorily required to maintain the planning register, "this is not a complete record of the planning status of all land in their area."

There is no national register that aggregates these. GOV.UK's Search the planning register service is a postcode-to-council lookup, not a database — you type a postcode, it tells you which council to go to, and it covers England and Wales only. Our planning permission history check and the wider property history search exist because that hop is where most people give up.

2. planning.data.gov.uk and the Planning Portal — two very different things

planning.data.gov.uk is MHCLG's open data platform, which collects planning and housing data from local planning authorities and republishes it in a consistent format under the Open Government Licence. It is genuinely useful and genuinely free. It is also, for planning applications specifically, nowhere near complete. As of the collection run on 17 September 2025, the planning-application dataset held 100,627 applications from just 6 data providers, and the platform displays a warning on the dataset page: "The planning application dataset is incomplete and is not yet ready for use." Treat it as a fast way to spot nearby activity, never as a completeness check.

The Planning Portal is something else entirely: a submission service, not an archive. It is where applications are filed and paid for before being routed to the relevant council — more than 97% of planning applications across England go through it, and it has served Wales since 31 March 2025. It publishes the national fee schedule and guidance on what needs permission, but it does not host a searchable public history of decided applications. If you have been searching the Planning Portal for a neighbour's extension and finding nothing, that is why.

3. The Planning Inspectorate — where refusals go to be argued

If an application was refused and the applicant appealed, the outcome sits with the Planning Inspectorate in England, and with Planning and Environment Decisions Wales for Welsh sites. Appeal decisions matter to buyers because an inspector's decision letter often explains, in far more detail than a council decision notice, exactly why development on that plot was or was not acceptable — which tells you a lot about what you would be allowed to do next.

• England: the Appeals Casework Portal holds current and recent appeals, searchable by reference or site address. It closed to new planning appeals on 1 December 2025 and to new enforcement appeals by the end of March 2026, as casework moved to the Inspectorate's new Appeal a Planning Decision service.
• England, in bulk: the free Planning Inspectorate casework database is downloadable as spreadsheets covering a rolling five-year period, with a separate file for casework decided five to ten years ago.
• Wales: the Planning Casework Service covers planning and enforcement appeals, high hedges, tree preservation and related decisions.

How far back the online register really goes

This is the single biggest gap between what buyers expect and what they find. The register regime has run since 1948 — Buckinghamshire, for example, holds details of applications received since July 1948 — but councils only put registers online when they moved to computerised case management, and they did that at very different times. Scanned documents (as opposed to a one-line summary) usually appeared later still: Westminster's online entries between 1990 and May 2000 may consist of the decision notice only.

Three real councils, checked on their own pages, show how wide the variation is — and how differently they price the archive:

The 1948 watershed: when planning permission began

The Town and Country Planning Act 1947 nationalised the right to develop land. It came into force on the "appointed day", 1 July 1948 — the date fixed by the regulations made under it. Before that date, most development simply did not require planning permission, so no application was ever made and no record could exist.

This is not just history. Government guidance on lawful development certificates lists, among the circumstances in which development is lawful for planning purposes, that "it took place before 1 July 1948", the appointed day under the 1947 Act. So if the outbuilding, the extra storey or the change of use predates July 1948, the absence of a planning record is the expected outcome, not a problem — the difficulty is proving the date. Old Ordnance Survey maps, deeds plans, census and rating records and dated photographs all help; our guide to working out when a house was built covers the dating evidence in more detail.

For a Victorian terrace or a 1930s semi, then, the original building needs no permission at all. Everything you are actually looking for is the layer of later alterations: the loft, the rear extension, the dropped kerb, the flat conversion. That is what the register can, and should, show.

Why "no application" is not evidence of a breach

A blank search result is the most commonly misread thing in property research. There are at least four innocent explanations before you get anywhere near "unlawful".

It helps to know the scale of what the register does capture. MHCLG's statistics show English authorities decided 298,100 planning applications in the year to March 2026 and granted 87% of them; 151,900 of those decisions — 51% of the total — were householder applications, of which 90% were granted. Refusal is the exception, not the rule, which is one reason a missing record more often means "no application was needed" than "it was turned down".

1. It was permitted development. Planning practice guidance describes permitted development rights as "a national grant of planning permission which allow certain building works and changes of use to be carried out without having to make a planning application", set out in Schedule 2 of the General Permitted Development Order 2015. Most modest rear extensions, loft conversions and outbuildings fall inside those limits and generate no application at all.
2. It predates the online register. As above — the application exists, on microfiche, in a building you have not visited.
3. It predates 1948. No permission was required, so none was sought.
4. It was a building regulations matter, not a planning one. Building control is a separate function with a separate record. A rewire, a new boiler, replacement windows or internal structural work may need building regulations approval and no planning permission whatsoever.

The reverse also matters: permitted development rights can be taken away. Guidance confirms they may be removed "either by means of a condition on a planning permission, or by means of an article 4 direction", and conservation areas carry tighter controls over demolition. On a new-build estate, a condition on the original outline permission frequently strips out the right to extend. So the presence of a permission in the history can be as informative as its absence — the conditions attached to it are the part to read.

Enforcement, immunity and the certificate of lawfulness

If something really was built without permission, the question that decides whether it is a problem is whether the council can still act. Section 171B of the Town and Country Planning Act 1990 sets the time limits, and they changed materially in 2024.

The English change came from section 115 of the Levelling-up and Regeneration Act 2023, commenced on 25 April 2024. Critically, it is not retrospective: the commencement regulations provide that the amendment does not apply where the operations were substantially completed, or the relevant breach occurred, before that date. So a 2019 extension in England is still judged on the old four-year rule and is already immune; a 2025 one is not immune until 2035. Wales did not follow suit for operational development.

The certificate of lawfulness route

Once the enforcement period has run, section 191(2) makes the use or operation lawful, and anyone can apply for a certificate of lawfulness of existing use or development to prove it. The certificate is the strong version of the evidence: under section 191(6) the lawfulness of anything covered by a certificate in force "shall be conclusively presumed". Its sibling, a section 192 certificate, confirms in advance that something you propose to do would be lawful — the standard way to put a permitted development scheme beyond argument.

• Fee (England, from 1 April 2026): for an existing use or operation, the same as the equivalent full planning application fee — £548 where the works are an alteration to a single dwellinghouse. For a proposed use, half the full application fee. A certificate that an existing use is lawful because it need not comply with a condition costs £309.
• Time: the authority must give written notice of its decision within 8 weeks of receiving a valid application (DMPO 2015, article 39).
• Burden of proof: firmly on the applicant. Guidance is explicit that the onus "is firmly on the applicant" and that authorities "need not go to great lengths" to establish lawfulness for you.
• Standard of proof: the balance of probabilities, not beyond reasonable doubt. Where the authority has no contradictory evidence, it should grant the certificate "provided the applicant's evidence alone is sufficiently precise and unambiguous".
• A refusal is not fatal: guidance confirms a refusal "is therefore not necessarily conclusive that something is not lawful" — it may simply mean the evidence was thin, and a better-evidenced application can follow.

One more trap on the "proof planning permission was granted" question: a permission that was never implemented expires. Section 91 requires development to begin within three years in England, five in Wales. A 2011 decision notice granting a two-storey extension proves nothing about your right to build one today if nobody ever started it.

What to do when the record is missing

In practice there are four moves, and the order you make them in matters more than most guides admit.

1. Ask the seller first. The decision notice and the approved drawings are the primary proof, and the owner should have them. If they were lost, the council can usually reissue a copy of the decision notice from the register.
2. Buy the council archive search. A flat-fee planning history request (£65 at Cornwall, per-document or per-property pricing at Westminster) is cheap relative to a purchase and frequently resolves the question outright.
3. Apply for a certificate of lawfulness. Where the works are genuinely immune, an s191 certificate converts an argument into a document. It is the seller's job to obtain it, and the eight-week clock is the reason it needs raising early rather than the week before exchange.
4. Take an indemnity policy — but understand what it is. A lack-of-planning-permission policy pays for the cost of complying with an enforcement notice, the cost of challenging one, and diminution in value in appropriate cases. It does not tell you anything, and it does not make the work sound.

And the honest boundary: once you are in this territory, it belongs to a conveyancer. Whether a particular extension is immune, whether a condition was discharged, whether a s106 obligation binds you, and whether a policy is acceptable to your lender are legal judgements on specific facts. Desk research narrows the question and gets it raised three weeks earlier — see what the conveyancing searches actually cover — but it does not answer it.

Where HouseDossier fits — and where it does not

We should be precise about this, because the gap between "planning data" and "the planning register" is exactly where buyers get misled.

A HouseDossier report queries MHCLG's planning.data.gov.uk open dataset for planning applications within roughly 800 metres of the address; on paid tiers, when that comes back thin, we also run a web search across council planning portals. That is a genuine early-warning system for nearby development, and the free teaser costs you nothing to look at. But as set out above, MHCLG itself flags the dataset as incomplete — six data providers at the last collection — so for many English addresses it returns little or nothing, and because the dataset covers England only, it returns nothing for Wales. When our planning section is quiet, that is a gap in the national feed, not a clean planning history.

• What we do: surface nearby applications from the open dataset, plus council-portal results on paid tiers; flag listed building status (Full Dossier); pull sale history and comparables from HM Land Registry price paid data back to 1995; EPC records, flood and ground risk, council tax band, broadband, schools and crime.
• What we are not: the statutory planning register. We do not hold the council's Part 1 and Part 2 register, we do not retrieve microfiche, and we cannot tell you whether a specific extension had permission.
• What we cannot see at all: the title register and deeds, enforcement notices (those come through the LLC1 in your solicitor's local search), building control sign-off, archaeological designations, former land use, or the exact year a house was built — for construction age we report the EPC age band, which the Full Dossier carries into its property history section.

For a specific address, the sequence that actually works is: run a free check to see the shape of the area, search the council register yourself for the address and both neighbours, buy the council archive search if the register starts after the works you can see, and hand anything unresolved to your conveyancer before you exchange.

Frequently asked questions