A real estate transaction can look excellent on paper and still become complicated because of an unauthorized addition, a balcony enclosed without a permit, or a storage room turned into a residential unit. This is exactly where checking building irregularities before purchase stops being a technical review and becomes an almost basic condition for a responsible deal. Anyone who skips this step may discover too late that the property they purchased does not match the permits, the approved plans, or even what can lawfully be sold in the future.
The common mistake is to think that a building irregularity is a minor matter, or something that can simply be “sorted out later.” In practice, an irregularity can affect the value of the property, the ability to obtain a mortgage, future resale prospects, exposure to demands from the local authority, and sometimes even the overall viability of the transaction. Therefore, before advanced negotiations and certainly before signing, it is essential to understand exactly what is being purchased.
Why checking building irregularities before purchase is so critical
When buying an apartment, a private home, a commercial property or an investment asset, it is not enough to review the Land Registry extract, rights and registrations. It is also necessary to examine the actual planning status of the property against the approved status. The gap between the two is where most costly surprises begin.
A building irregularity is not only a moved wall or a pergola that was built. It may involve an enclosed balcony, an extension built without a permit, an apartment split into separate units, construction of a storage room, conversion of a parking area, installation of a gallery level, or a change of use in the property. Even if the seller says everything has existed for years and that “no one ever made an issue of it,” that is not a legal guarantee. A local authority may still act years later, and in some cases the problem surfaces דווקא when someone tries to sell the property, mortgage it, or regularize the registration.
There are also cases in which the irregularity does not prevent the transaction, but it does require a different price, contractual protection mechanisms, or a demand for prior regularization. Therefore, the correct question is not only whether an irregularity exists, but also what its scope is, what risk it creates, and whether that risk can be managed properly.
What is included in checking building irregularities before purchase
A proper review is not limited to asking the seller a general question. It combines documents, planning review and a comparison with the property on the ground. The goal is to determine whether the built property matches the permit, the plans and the permitted use designation.
At the first stage, the relevant documents are examined through the local authority and the registration sources. This usually includes the building permit, approved plans, the building file, drawings, and sometimes additional approvals concerning additions made over the years. In an apartment within a shared building, it is also important to verify whether attachments, the storage room, balcony, parking area or roof actually match both the registration and the built reality.
At the second stage, the documents must be compared with reality. This is where many issues are discovered: an extra room, a protected room built differently from the permit, an internal layout that was changed, an enclosed open area, or an actual use that does not match the designated use. Sometimes the difference appears small, but from a legal and planning perspective it is significant.
At the third stage, the implications of each irregularity that was found are examined. Not every deviation is enough to end a transaction, but every deviation requires a risk assessment. Some irregularities can be regularized, some are very difficult to regularize, and in some cases the very existence of the irregularity harms financing or creates exposure that should not be accepted.
Where buyers usually get it wrong
Many buyers rely on three things that are not enough: what the seller says, what they see with their own eyes, and what appears in the listing. That is a problematic starting point. A seller is not always aware of the full issue, an agent does not provide a planning opinion, and a property that appears orderly can still hide a material mismatch with the official documents.
Another mistake is assuming that if a bank grants preliminary mortgage approval, everything must be in order. In practice, at the appraisal stage or during later checks, irregularities may emerge that affect the level of financing or the approval itself. In simple terms, a deal that looked closed can reopen at the most sensitive point.
Some buyers also think that a small irregularity is insignificant. But in real estate transactions, “small” is not always small. If an area is marketed as part of the property but is not approved, if a residential unit was added without a permit, or if the roof is being used unlawfully, the financial and legal result may be very far from what the buyer expected.
A building irregularity does not always require cancelling the transaction
This is an important point. The purpose of the review is not to frighten anyone, but to enable an informed decision. There are cases in which an irregularity is discovered and the transaction is still the right one, provided that its meaning is understood and handled accordingly.
If the irregularity is something that can in principle be regularized, it may be appropriate to require the seller to regularize it before signing or before delivery. In other cases, it may be worth considering a price adjustment, holding funds in trust, detailed declarations and undertakings in the agreement, or a mechanism that places responsibility on the seller to handle the issue. Everything depends on the type of property, the scope of the irregularity, the timeline, and the practical ability to achieve regularization.
On the other hand, there are situations in which the recommendation is to stop. For example, when there is a significant gap between the property being marketed and the approved situation, when there is severe planning uncertainty, or when the legal risk is too high in relation to the consideration. A good transaction is not only an attractive property, but one that can be held, financed, used and sold with relative confidence.
What to review in second-hand apartments, private homes and commercial properties
In second-hand apartments, the focus is usually on matching the built apartment to the permit, the plan and the registration in the shared building. Additions such as enclosing a balcony, expanding the living room, attaching a storage room to the apartment or exclusive use of common area require special attention.
In private homes, the review is broader. It is necessary to examine the structure itself, building additions, pergolas, storage structures, pools, separate units, retaining walls and sometimes even exterior development. In these properties, the gap between what exists on the ground and what was approved can be very substantial and may have accumulated over years of changes.
In commercial properties, an important additional element is use. Even if the structure itself exists, not every use is permitted. An office operating in a space designated as storage, a clinic operating where such use was not approved, or an internal division affecting licensing and operation all require precise review, because the issue is not only proprietary but also operational and commercial.
How to integrate the review into the purchase process
The right time to carry out a building irregularities review before purchase is as early as possible. Not after signing, not after transferring a substantial deposit, and not when the parties are already deep into a pressured timetable. The earlier the review is carried out, the more the transaction can be managed instead of reacting to a crisis.
In practice, it is advisable to carry out the review alongside the other legal and commercial checks. This creates a complete picture: the registered rights, the planning status, tax, financing and contractual aspects. It also makes it possible to draft an agreement that fits reality, rather than relying on a standard agreement that does not address the issue that was discovered.
At a firm that accompanies real estate transactions comprehensively, this review is not a separate and disconnected stage, but part of overall risk management. The goal is to identify problems in advance, translate them into practical language for the client, and then decide whether to proceed, adjust the terms, or stop in time.
What to ask before moving forward with the transaction
Before getting excited by the price, the location or the potential, it is worth asking a few simple questions: Has everything that was built been lawfully approved? Does the use of the property match its designation? Were there additions, enclosures or divisions made over the years? Are there documents that confirm them? If the answers are vague, that does not necessarily mean the transaction is invalid, but it certainly means it is time to slow down and examine the matter.
In real estate transactions, the true price of a mistake usually becomes clear later. Sometimes when the bank reduces financing, sometimes when the buyer tries to sell, and sometimes when a demand for regularization or enforcement arrives. A proper review before purchase does not guarantee a perfect transaction, but it significantly reduces the risk of entering the wrong transaction, or the right transaction on the wrong terms.
Ultimately, buying a property is not only a decision about an address or an investment. It is a legal and financial decision with long-term implications. When building irregularities are examined in time, it becomes possible to make a calmer decision, negotiate from a stronger position, and build a transaction that protects not only your money but also your peace of mind.
Disclaimer: The information in this article is provided for general informational purposes only and does not constitute legal advice, a legal opinion, or a substitute for individual advice from an attorney. Each case should be reviewed according to its specific circumstances, and it is recommended to consult an attorney before making any decision or taking action.
