Understanding how properties are assessed by lenders is crucial for anyone entering the property market. While most transactions proceed fairly smoothly, properties that fall outside the “standard” criteria—such as those with flying freeholds or unusual boundaries—often prompt additional scrutiny and may require a deeper understanding of their unique characteristics. These less common scenarios may affect lending decisions and, in some cases, result in delays or even failed transactions if not thoroughly addressed. In this article, we explore the key considerations lenders make when assessing such properties, the potential issues that can arise, and how buyers and sellers can best prepare to navigate these challenges.

What is a flying freehold and why it matters

A flying freehold refers to a situation where a part of a freehold property overhangs or underlies another person’s property without vertical alignment of the ownership underneath. Common examples include a bedroom above a shared passageway, a first-floor room that extends over a neighbour’s garage, or an upper floor that sits partly above another person’s ground floor.

The issue with flying freeholds lies not in the structural design itself but in the legal and practical complications it can introduce. Lenders are obligated to consider both the legal ownership and the ability of the borrower to maintain, access, or repair structures related to their property. If part of a property is located over, or under, someone else’s ownership, it can cause uncertainty around rights of support, repair and access, which can complicate future ownership or even impact resale value.

From a lender’s perspective, there needs to be clear legal access to maintain and repair the part of the property that does not rest entirely on the owner’s land. For instance, if roofing or external walls need to be maintained, but they are only accessible from a neighbour’s land, this raises concerns. Any ambiguity in these rights can increase risk for the lender, potentially affecting the value of their security.

To mitigate this, lenders often look for documentation that outlines legal rights of access and repair, commonly known as easements, along with other protective covenants. In cases where these rights are absent or unclear, it may be necessary for a legal indemnity insurance policy to be put in place or for negotiations with neighbouring landowners to formalise these rights via deed.

Identifying and understanding unusual boundaries

Unusual boundaries come in many forms and may be historic, natural, or created through incorrect mapping or informal land division. Examples include narrow strips of land left off the title plan, boundaries that follow rivers or natural features that may shift over time, or ownership lines that zigzag due to amalgamations, subdivisions or uneven plots.

Lenders view such properties with caution largely because of the potential for boundary disputes or legal ambiguity. The integrity and clarity of land ownership are essential in forming the basis of safe collateral for a mortgage. When boundaries are unusual or ill-defined, it creates a risk that part of the ‘security’—the property against which the mortgage is granted—might be subject to challenge, or not be owned as clearly as initially stated.

The title plan and property deeds are vital for clarifying the property’s boundaries, and lenders often rely heavily on the Land Registry’s official records. However, even Land Registry documents can sometimes leave room for interpretation, especially when historic features, hedgerows, or hand-drawn plans are involved.

Surveyors, solicitors, and conveyancers all play important roles here. A lender might request an updated plan drawn up by a RICS-qualified surveyor, especially if the existing documentation is unclear. In more complex cases, a title rectification may be required, involving legal action to formalise the property lines.

Legal due diligence: the solicitor’s role in risk identification

Conveyancers and solicitors are the front-line professionals in flagging potential issues with a property in relation to flying freeholds or unclear boundaries. They carry the responsibility of identifying risks early in the transaction, thereby enabling the lender to make informed choices or set lending conditions accordingly.

When acting for the lender, a solicitor must investigate not only the existence of a flying freehold but also whether proper easements, covenants, and agreements are in place. In the absence of these, lenders will often require indemnity insurance to cover potential liabilities, but this is not always a substitute for solid legal rights—especially as indemnity policies may not cover all future scenarios, such as development works or access disputes.

For unusual boundaries, closed examination of the title deeds and Registry plans is a must. In some instances, especially with older properties, boundaries might not fully align with modern mapping techniques. If the documentation relies on historic features like walls or hedges, the solicitor must ascertain whether these still exist and accurately reflect the current land use.

Where land appears unregistered, or rights of way cross over the property, further investigation will likely be needed. These may not necessarily be deal-breakers, but will typically require clarification and, again, may lead to a request for indemnity insurance or legal remedial steps.

The lender’s valuation process and potential red flags

A key part of any loan approval lies in the valuation report. Lenders usually employ chartered surveyors to carry out either a mortgage valuation, a homebuyer’s report, or a building survey depending on the borrower’s choice and the lender’s requirements. This valuation will inform the lender if the property is worth the amount the borrower wishes to obtain and whether there are risks that are not obvious from the legal documents alone.

Flying freeholds will be a notable flag in a valuation report. Surveyors will look at the degree of overhang or underlying construction, and whether it materially limits access or future upkeep of the property. They also assess if the flying section includes critical parts of the home like an entrance, stairwell or functional room, which increases the reliance on good neighbourly relations and cooperation.

In some cases, a lender may refuse to lend entirely if the flying freehold is particularly significant and cannot be legally supported by the necessary documentation. Others may simply apply more stringent restrictions, such as limiting the loan-to-value ratio or demanding additional guarantees.

For properties with unusual boundaries, surveyors are alert to discrepancies between what appears physically on the ground and what the legal documents suggest. They will measure land coordinates, check alignment with plans, and investigate the utility of the boundaries—for example, whether a small access path legally belongs to the property or whether a wall is entirely within the owner’s land.

Red flags, such as unresolved disputes with neighbours, history of land encroachment, or ownership queries, will almost certainly impact the lender’s decision-making. In some cases, the valuer may even reduce the estimated market value of the property to reflect the perceived risk, which can affect the borrower’s ability to secure the loan.

Mitigating risks and smoothing the path to completion

The good news is that, while flying freeholds and odd boundaries can present legal and financial complications, many of these are resolvable with the right approach and due diligence. Successful transactions often stem from proactive risk management from the earliest stages of property searches.

Buyers should look to engage experienced solicitors and surveyors early in the process, particularly when there are signs that the property may have abnormal characteristics. Awareness is the first step—knowing the implications of shared airspace, overlapping land rights, or map discrepancies allows everyone involved to frame the issue in its proper context.

When irregularities are found, being open with the lender and taking necessary steps like obtaining legal confirmations or purchasing indemnity cover can make a significant difference. In negotiations, sellers can offer warranties or even undertake remedial legal actions before listing the property to make it more attractive to buyers and financiers.

In situations where the legal remedy may be complex or relationships with adjacent property owners are critical—for instance, agreements for maintenance or access rights over neighbouring land—open dialogue can sometimes yield easier paths forward than legal action. Establishing formal agreements through deeds of easement or boundary agreements can cement the essential rights that lenders need to see before committing to the loan.

The changing attitudes of lenders and the impact of regulation

In recent years, there has been a modest shift in how lenders assess these non-standard situations. With more buyers attracted to unique or character properties—especially in historic urban centres or rural locations—lenders are becoming increasingly familiar with the nuances of imperfect property layouts.

At the same time, however, regulatory scrutiny and risk mitigation remain core priorities for financial institutions. The Mortgage Conduct of Business rules and guidance from the Financial Conduct Authority place an obligation on lenders to ensure that mortgage decisions are responsibly made, minimise future risk, and consider the long-term viability of the loan security.

This has led to sophisticated risk frameworks where lenders categorise properties into standard and non-standard types, with flying freeholds and unclear boundaries fitting squarely into the latter. While this doesn’t mean rejection, it does mean added steps—more paperwork, more legal reasons to delay, and greater demands for documentation to address the grey areas.

Technological advancements do offer some help—the availability of digital mapping tools, better access to land registry records, and enhanced surveying technology all contribute to more accurate and transparent assessments. Some progressive lenders have even created specialist underwriting teams or case-by-case application avenues to deal with complex or unique properties, offering more tailored solutions than a binary yes-or-no outcome.

Conclusion: preparedness is key

Whether you are buying, selling, or acting in a professional capacity on a transaction involving a property with a flying freehold or an unusual boundary, understanding the perspective of lenders is essential. Their primary concern is reducing the risk associated with the property loan, and both the legal rights and the physical layout of the land and building play directly into this risk profile.

The more clarity you can present—not just visually in the form of maps and surveys, but through legally binding documents—the more confident a lender will be in proceeding. Early identification, collaboration between legal and surveying experts, and strategic risk management are all vital components in ensuring a smooth transaction.

For buyers, this means engaging the right professionals early, asking the right questions, and being ready to address concerns before they escalate into delays or rejections.

For sellers, it means anticipating lender hesitations and taking steps to provide the necessary assurances upfront.

In short, properties with flying freeholds or unusual boundaries are far from un-mortgageable — but success hinges on preparation, transparency, and a willingness to resolve ambiguities before they reach a lender’s desk.