An extension, loft conversion or change of use may have caused no obvious difficulty for years.
Then the property is sold or remortgaged.
The buyer’s conveyancer cannot find a planning permission. A new mortgage lender asks questions. Someone suggests indemnity insurance. What appeared to be an old paperwork problem suddenly threatens to delay the transaction.
But “missing planning permission” can describe several different situations—and they should not be treated as though they are the same.
What does “missing planning permission” actually mean?
The first task is to identify what is genuinely missing.
Possibilities include:
- permission was granted, but a copy of the decision notice cannot presently be found;
- the development did not require a separate application because permitted development rights applied, subject to the relevant conditions and limitations;
- permission was required but was never obtained;
- permission was granted, but the development did not follow the approved plans;
- a condition attached to the permission was not satisfied or discharged; or
- the property is affected by a planning restriction, such as an occupancy or resale condition.
Missing paperwork does not, by itself, establish a breach of planning control. The local planning register, the age and nature of the development, the approved plans and any conditions may all be relevant.
That distinction matters before considering what a conveyancer or mortgage lender should have done.
Planning permission is not Building Regulations approval
The two are frequently mentioned together, but they perform different functions.
Planning control concerns whether development or a particular use was permitted. Building Regulations concern how work was carried out, including issues such as structure, fire safety, drainage and glazing.
A project can have planning permission but lack Building Regulations approval—or the reverse. Evidence concerning one does not establish the position concerning the other.
This article concerns planning permission and related planning restrictions. Missing Building Regulations documentation requires a separate analysis.
Why might a mortgage lender be concerned?
A lender is taking the property as security for the mortgage. An unresolved planning issue may create questions about enforcement exposure, value, marketability and the availability of future purchasers.
Depending on the lender’s instructions and the facts, a conveyancer may have needed to consider matters such as:
- whether reasonable searches and enquiries had established the planning position;
- whether there was evidence of a breach;
- whether an unqualified certificate of title could be given;
- whether the issue had to be reported to the lender;
- whether the lender required copies of permissions or other consents;
- whether indemnity insurance was required or acceptable; and
- whether a planning condition or restriction could materially affect value or future marketability.
These are not interchangeable questions. Producing a missing document, assessing enforcement risk and reporting a restriction that affects marketability are different functions.
What about section 106 and other planning restrictions?
Sometimes the concern is not that permission is absent. The permission may exist and have been followed, but the property remains subject to an enforceable restriction.
A section 106 agreement or planning condition might impose an occupancy restriction, a local-connection requirement, an affordable-housing obligation or a restriction on the price at which the property can be resold.
Such a restriction may affect value or future saleability even when nobody has breached it. It may reduce the pool of eligible purchasers or affect which lenders are prepared to accept the property as security.
That is related to missing planning permission, but it is not the same problem.
Why today’s lender requirements may not answer a historical question
Suppose a planning issue emerges in 2026 concerning a purchase completed in 2013.
Looking at the lender’s current published requirements tells you what that lender says now. It does not necessarily establish what its conveyancing instructions said on the date of the original transaction.
Individual lenders amend their requirements over time. They may change when a matter must be reported, what evidence is required, whether insurance is acceptable or when a case must be referred for individual approval.
The structure and numbering of the Handbook have also changed. A topic that appears under one question today may have appeared elsewhere in the historical record.
The more precise historical question is therefore:
What did this mortgage lender’s recorded requirements say about the planning issue on the date relevant to the transaction?
The lender and date both matter. A requirement recorded for one lender—or for the correct lender on a different date—should not be treated as the instruction applicable to the transaction under investigation.
Why the wider mortgage market can matter
The original lender’s position is only one part of the picture.
If a planning issue meant that fewer lenders would accept the property, that may have reduced the pool of realistic purchasers. Most buyers rely on mortgage finance, so mortgageability can be an important component of practical marketability.
That does not mean the property was unsaleable. It may still have been acceptable to some lenders or to cash purchasers. Nor does a difference between lenders prove that one was wrong.
It does mean that, when investigating what was known at the time, it may be useful to distinguish:
- what the purchaser’s own lender required; and
- how other lenders treated the same issue on the same date.
Historical market context can help answer whether the original lender’s position was common or unusual. It cannot determine liability without the conveyancing file, the facts and appropriate legal advice.
Does the fact that the mortgage completed settle the question?
No. Completion proves that the transaction proceeded; it does not reveal every step that led to that outcome.
To understand what happened, it may be necessary to compare the historical lender instructions with:
- the local authority search and planning register entries;
- the conveyancing enquiries and replies;
- the planning permission, approved plans and conditions, if available;
- any section 106 agreement;
- the valuation and mortgage offer;
- correspondence with the lender;
- any indemnity policy; and
- the report provided to the purchaser.
That comparison may show that the issue was investigated and satisfactorily addressed. It may reveal that permission existed after all, that lender approval was obtained or that a professional judgment was recorded. Alternatively, it may identify a question requiring further investigation.
The outcome cannot be inferred simply from the presence of a mortgage on the title.
Does indemnity insurance solve the problem?
Insurance may sometimes be considered, but its purpose and limits need to be understood.
In the context of unauthorised development, a policy will usually respond only to specified losses connected with enforcement action and subject to its terms. It does not grant planning permission, certify that the development followed approved plans or confirm that the physical work is satisfactory.
Where a property is subject to an enforceable planning restriction, insurance does not remove that restriction. An occupancy condition or resale covenant continues to bind the property unless it is lawfully changed or discharged.
The further question is whether the policy met the particular lender’s requirements on the relevant date. Lenders’ recorded approaches have not been uniform and have changed over time.
What can a historical lender record establish?
A dated lender record may help establish:
- what the lender’s Part 2 requirements said on the selected date;
- whether the lender imposed an express reporting, evidence or insurance requirement;
- whether its recorded wording changed before or after the transaction; and
- how other lenders’ recorded positions compared on the same date.
It cannot, by itself, establish:
- that the development required permission;
- whether permission was actually granted;
- what work the conveyancer performed;
- whether anyone was negligent;
- what an absence of express lender wording meant; or
- whether the property is acceptable to a lender today.
The historical record is evidence of the recorded lender requirement, not a substitute for the original file or legal analysis.
Checking what the lender required at the time
The Lexsure Lender Archive’s missing planning permission topic contains historical lender-specific conveyancing requirements dating back to 2007.
Lexsure’s archive records show that lender answers relevant to planning have been amended repeatedly. Its England and Wales records identify 296 recorded amendments to two planning-related answers between 2009 and 2026. Of those, 67 are provisionally classified as changing the practical requirement; the remaining amendments are treated as non-substantive. Because those answers can contain material on other subjects, the figures are not a count of planning-policy changes alone.
The figures demonstrate why the current Handbook should not be used as a proxy for the historical position. They do not show, without further analysis, whether any particular change was stricter, more permissive or relevant to an individual transaction.
Start with the date, the lender and the actual planning issue
If missing planning permission has appeared during a sale, remortgage, complaint or claim investigation, begin by separating three questions:
- What is actually missing or potentially non-compliant?
- What did the original conveyancing file show was investigated and reported?
- What did the named mortgage lender require on the relevant date?
Only then is it possible to compare the contemporary instructions with what happened in the transaction.
Investigating an earlier purchase or mortgage?
Check the historical lender requirements for missing planning permission by lender and transaction date.
This article provides general information only. It is not legal or planning advice about any property, transaction or potential claim. Planning law, enforcement regimes and mortgage-lender requirements change. Obtain advice from an appropriately qualified professional. Time limits may apply.