Property Due Diligence When Buying a Business: A UK Solicitor’s Complete Guide

Property due diligence is one of the most under-appreciated areas of buying a business in the UK. In my years advising SME buyers, I have seen deals collapse weeks before completion because nobody asked fundamental questions like: can the business actually stay where it is? This guide walks you through the legal, contractual and economic checks you need to make before you commit, including a hidden risk that catches buyers off guard when the seller is also the landlord.

Chapter 1: What Property Due Diligence Actually Means When You Buy a Business

Property due diligence, in the context of buying a business, is the process of verifying that the target business has — and will continue to have — a lawful and commercially viable right to occupy the premises it operates from. In plain terms, it answers a simple question: after I complete this purchase, will I still be able to trade from this address tomorrow, next year, and ten years from now?

As a specialist corporate solicitor, I find this is the area buyers are most likely to assume to not be an issue. Due diligence tends to focus on contracts and litigation, and on the financial records. Property is often left to a brief paragraph on lease term and rent. Yet for many SMEs — restaurants, salons, dental practices, manufacturing operations, retail outlets — the premises is the business.

Asset Deal vs Share Deal: Why It Matters for Premises

How you structure the transaction has a direct impact on what happens to the property interest. The two routes have very different consequences:

Feature	Asset deal	Share deal
Who holds the property interest after completion	The buyer’s purchasing entity (lease must be assigned)	The target company (no transfer of legal title)
Landlord consent needed	Almost always — assignment requires it	Often required anyway, via change of control clauses
Stamp duty land tax impact	Potentially yes on lease premium	None on the property interest itself
Risk of “no consent, no completion”	High — visible early in DD	Hidden — usually surfaced mid-DD
Continuity of trading licences and insurance	Need to be re-established	Continues with the company

Comparison of the property implications of an asset deal versus a share deal.

Most SME buyers assume a share deal is “safer” for premises because the company stays the tenant. In practice, that is a half-truth. A well-drafted commercial lease will treat a change of control of the corporate tenant as a deemed assignment requiring landlord consent. The change is invisible from the outside but legally significant inside the lease.

The Underlying Question

Strip away the technicalities and a buyer is really asking three things about premises:

Do I have a legal right to stay? This is about tenure — is the property freehold, or is it a lease, and if a lease, what does the law give the tenant?
Do I have a contractual right to stay? This is about what the lease itself says — change of control, assignment, alienation, use.
Does it make economic sense to stay? This is about cost — rent, reviews, dilapidations, breaks.

I have organised the rest of this guide around these three questions, with a final chapter on a structural risk I see repeatedly in owner-managed business sales.

Chapter 2: The Legal Right to Stay — Tenure and the Landlord and Tenant Act 1954

The first question to answer is what kind of property interest the target business holds. Broadly, you are looking at one of three positions:

Freehold ownership: the company owns the premises outright. Property due diligence here looks more like a conveyancing exercise: title, charges, easements, planning, environmental searches.
Long leasehold: the company holds a long lease (often 99 or 125 years) at a peppercorn rent. Functionally similar to freehold for trading purposes.
Commercial lease (occupational): the company occupies under a shorter lease, usually 5 to 25 years, paying market rent. This is the most common position for SMEs and where most property DD risk sits.

For occupational leases, the central piece of legislation is the Landlord and Tenant Act 1954. Part II of that Act gives business tenants a statutory right to renew their lease at expiry, on terms set by the court if the parties cannot agree. In short, a “protected” tenant cannot simply be turned out at the end of the term.

But — and this is the trap — landlords often insist on the lease being contracted out of those renewal rights. A contracted-out lease ends on its expiry date with no statutory right to renew. The buyer takes a tenant who is, in effect, a guest with a fixed departure date.

What to Check on Tenure

Is the lease protected or contracted out? The contracting-out procedure requires a specific statutory notice and tenant declaration.
How much term is left? A business with two years left on a contracted-out lease is at risk.
Are there options to renew or extend? If so, on what terms, and have any conditions been satisfied?
Is there a guarantor or rent deposit? A previous owner’s personal guarantee may not transfer to the buyer.
For freeholds, what does the title show? Charges in favour of lenders, restrictive covenants, rights of way and overriding interests can all affect value and the ability to redevelop.

I have seen buyers proceed to heads of terms without ever asking whether the lease is protected. By the time the question is raised in formal DD, the buyer is emotionally and financially committed and the lever has been lost.

Chapter 3: The Contractual Right to Stay — Change of Control, Assignment and Use

Even if the tenure position is sound, the lease itself may stand in the way of the deal. Three sets of clauses do most of the damage.

Change of Control Clauses on a Share Sale

Most well-drafted commercial leases include a clause that treats a change in the control of the corporate tenant as a deemed assignment of the lease, requiring the landlord’s consent. The buyer of the shares does not become the new tenant — the company remains the tenant — but the lease still treats the transaction as triggering consent.

In plain terms: you can buy 100% of the shares in a target company, complete the deal, and find that you have technically breached the lease the day after completion. The landlord’s remedies typically include the right to forfeit the lease.

What you must do during DD:

Read the lease in full, paying particular attention to any clause referring to “change of control”, “transfer of beneficial ownership”, or deemed assignment.
Check whether the clause defines control narrowly or broadly — some clauses catch even minority changes in shareholding.
Establish whether the landlord’s consent has been requested or is conditional on rent increases, additional security or refurbishment works.
Consider whether consent should sit as a Condition Precedent in the share purchase agreement, so that completion does not occur until consent is in hand.

Assignment Provisions on an Asset Deal

In an asset deal, the lease must be formally assigned to the buyer’s purchasing entity. Standard commercial leases contain a qualified covenant against assignment — the lease cannot be assigned without the landlord’s consent. Further, the Landlord and Tenant Act 1988 imposes a duty on the landlord to give a decision within a reasonable time and to give written reasons for any refusal.

Reasonable conditions a landlord may impose include an Authorised Guarantee Agreement from the outgoing tenant, a rent deposit from the incoming tenant, and references. Unreasonable conditions are a matter for the courts and a frequent source of dispute.

Use Clauses and Alienation Provisions

Two further clauses can derail a deal even where consent to assignment or change of control is forthcoming:

Permitted use clauses: these define what the premises can be used for. A buyer planning to expand the product range or change the trading model may find the lease prohibits the new use.
Alienation provisions: these govern subletting, sharing of occupation, and group restructuring. A buyer planning to bring in a related entity to share part of the premises may need separate landlord consent.

Always test the lease against the buyer’s actual plans, not the seller’s historic use.

Chapter 4: The Economic Right to Stay — Rent, Reviews, Dilapidations and Break Clauses

A deal can be technically compliant and still uneconomic. The financial terms of the lease deserve as much scrutiny as the legal ones.

Headline rent and rent reviews: When was the last review? Is the next review upwards-only? Open-market or RPI/CPI-linked? An imminent upwards-only review can transform the post-completion economics.
Service charges and insurance recovery: How much is the tenant currently paying on top of rent? Are there any disputed items?
Break clauses: Mutual breaks favour both parties; landlord-only breaks favour the landlord and create medium-term insecurity. Conditions on a tenant’s right to break — vacant possession, all sums paid, no breach of covenant — are notoriously easy to fall foul of.
Dilapidations exposure: What is the likely cost of putting the premises back into the contractual state of repair at lease end? A surveyor’s schedule of condition or a dilapidations assessment is often money very well spent during DD.
Rates and other outgoings: Reliefs in place may not transfer; small business rate relief, in particular, depends on the occupier.

The economic picture should be modelled across the remaining lease term, not just for year one.

Chapter 5: When the Seller is Also Your Landlord — A Hidden Risk in SME M&A

Here is the structural risk that, in my experience, catches more SME buyers off guard than any of the technical issues above.

In owner-managed businesses, the seller often owns the trading company and the property the company trades from — typically through a separate property holding company, in their personal name, or through a SSAS pension. When they sell the business, they retain the property. The lease between the trading company (now owned by the buyer) and the property-owning entity (still owned by the seller) becomes part of the seller’s retirement income.

A pattern I see repeatedly with clients is that the lease, which was previously informal or self-serving, is regranted shortly before sale on terms that quietly favour the seller-as-landlord. The trading company being sold is committed to a long term, with no break, at a rent above the market. The seller walks away with both the sale proceeds and a guaranteed income stream backed by a tenant who cannot easily leave.

There are three specific things to scrutinise when this pattern is present:

Lease length: Is the term materially longer than market norms for the sector and location? An SME tenant on a 15-year lease where the local norm is five should raise immediate questions.
Break clauses: Is there a mutual break, a tenant break, or no break at all? A lease with no tenant break and a long term effectively prices in the seller’s retirement income at the buyer’s expense.
Rent versus open-market rent: Independent valuation is the only way to know. Compare against recent comparable lettings in the immediate area for similar premises.

The right response during DD is not necessarily to walk away — these arrangements can be perfectly fair where rent and term are at market and properly disclosed — but to surface the issue, get an independent valuation, and negotiate. Common adjustments include a rent reduction at completion, a tenant break inserted on a future date, or a price reduction on the share sale itself to reflect the above-market rent the trading company is locked into.

In short: if your seller is also your landlord, the lease is no longer just a property document. It is part of the deal, and it should be negotiated as such.

When Should You Consider Property Due Diligence Carefully?

Most buyers should treat property DD as a significant work-stream. It is particularly important in the following situations:

Where the business is location-dependent — restaurants, salons, retail, dental, veterinary, manufacturing.
Where the lease has fewer than five years left — the renewal position drives the value.
Where the seller owns the property — the seller-as-landlord pattern described above.
Where the buyer plans to relocate, expand or change use — the existing lease may not permit it.
Where development finance or a mortgage is being secured against the lease — lenders will require security over a leasehold interest that they consider transferable.
Where the buyer is a first-time acquirer — the inclination is usually to focus on financial DD; a lawyer who understands property issues in an M&A context can flag risks early.

Need Help With Property Due Diligence?

If you are considering buying a business and want clarity on the property position before you commit — or want to sense-check a lease that has been put in front of you late in DD — I invite you to contact me now for a no-obligation discussion about how we can help.

For a deeper understanding of the wider DD process, I recommend reading my guide on What Is Legal Due Diligence and How To Master It. For a practical list of questions to put to the seller, see my 30 Questions to Ask When Buying a Business. And if you are on the seller side and want to prepare for the kind of scrutiny set out above, my guide on The Best Way to Sell Your Business is the natural starting point.

Conclusion

Property due diligence in a business purchase is not just about reading the lease. It is about asking, throughout DD, whether the business you are buying will continue to function at the address it trades from — legally, contractually and economically.

The legal right to stay is governed largely by the Landlord and Tenant Act 1954 and the question of whether the lease is contracted out. The contractual right is a question of what the lease itself says about change of control, assignment and use. The economic right turns on rent, reviews, dilapidations and breaks. Each of these can be the issue that destroys the value of an otherwise good deal.

And where the seller is also the landlord — a pattern I see repeatedly in owner-managed business sales — the lease becomes a negotiated part of the transaction itself. Treating it as a fait accompli is one of the more expensive mistakes a buyer can make.

Every deal is different, and the points above are general guidance rather than legal advice. Before committing to a business purchase where premises are material to value, I would always recommend taking specialist legal advice on the property and corporate position together. The two cannot sensibly be looked at in isolation.