The UK commercial property market looks steady on the surface. Office vacancy nationally sits at about 6 percent, up from roughly 4 percent before the pandemic. But that headline figure hides a sharper truth: roughly 80 percent of take-up in London and the South East is in Grade A buildings, while secondary stock sits empty. If you are a tenant, that split matters. Landlords of older buildings will tell you their space is a bargain, but they rarely mention that rents on secondary property are under pressure, service charges are rising, and the government is rewriting the rules on rent reviews and lease terms. Here is what the data actually reveals about renting commercial space in 2026.
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This article is general information only and does not constitute professional advice. For your specific situation, consult a qualified professional.
The market is splitting in two. Prime, well-located buildings with good sustainability credentials are commanding rental growth. Everything else is a harder sell. The Savills cross-sector outlook notes that office yield spreads between London and the regions are the widest ever recorded. That tells you investors and tenants alike are voting with their feet. Meanwhile, the CBRE market outlook expects transaction activity to pick up in 2026, with domestic core capital and cross-border money flowing in. If you are looking to lease commercial space this year, the timing of your search and the quality of the building matter more than they did five years ago. Here is what you actually need to know.
If you have never heard of an upward-only rent review, you are not alone. Most landlords do not advertise the term. It is a clause in a commercial lease that allows the landlord to increase the rent to market level at set intervals, but never decrease it — even if the market has fallen. The Law Commission is reviewing business tenancies and the government has already proposed banning upward-only reviews in new and renewal leases. That is a shift worth understanding before you sign anything.
What I tend to notice is that tenants focus on the headline rent and forget about the mechanisms that can push that figure up. The four takeaways above are the ones landlords rarely raise in a negotiation. They are worth weighing against any deal you are considering.
The Real Cost of Renting Commercial Space
The rent you see on a listing is never the full figure. Service charges, insurance rent, business rates, dilapidations at exit, and the cost of fit-out all add up. The CBRE outlook notes that operating costs in retail are rising, which will soften rental growth in that sector. For offices, the story is different: prime rental growth is running higher than normal, but the total occupancy cost can be 30 to 50 percent above the headline rent once service charges and business rates are included.
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| Hidden Cost | Typical Annual Impact | How Landlords Frame It | What You Need to Know |
|---|---|---|---|
| Service charges | £5–15 per sq ft | “Covers building maintenance and running costs” | New RICS Code (Dec 2025) is not legally binding — you still have limited recourse |
| Upward-only rent review | 3–5% annual increase typical | “Standard market practice” | Government plans to ban in new leases, but existing leases are unaffected |
| Dilapidations at exit | £10,000+ depending on condition | “Putting the space back to its original state” | Negotiate a schedule of condition at lease start to limit liability |
| Insurance rent | Variable, often 2–5% of rent | “Pass-through of the building insurance premium” | Landlord may receive commission on the policy — you are paying for it |
Take a tenant renting 5,000 sq ft in a regional city at £25 per sq ft. The headline rent is £125,000 a year. Add service charges at £10 per sq ft (£50,000), insurance rent at 3 percent of rent (£3,750), and business rates (often £15–20 per sq ft depending on the property). The total occupancy cost can hit £250,000 a year or more. That is double the headline rent, and landlords do not lead with that number.
For tenants in service charge audit fees, the key is to understand what you are paying for before you sign. If you are unsure about any of the lease terms, running them past a business law specialist can help you spot the clauses that will cost you later.
Mistakes That Cost Tenants Thousands
Signing a lease without checking the rent review clause
Upward-only rent reviews are still legal in England and Wales. The government has proposed banning them in new and renewal leases, but that legislation has not passed yet. If you sign a lease today with an upward-only clause, you are agreeing that your rent can only ever increase — even if the local market collapses. The Law Commission’s phase 1 consultation on business tenancies has already concluded that the minimum term for protected tenancies should rise from six months to two years. That means less flexibility to exit if your rent becomes unaffordable. What I would do: ask the landlord to cap the review at a fixed percentage or remove upward-only entirely. If they refuse, factor the risk into your offer price.
Treating service charges as a fixed cost
Service charges are not fixed. They vary year to year based on what the landlord spends on maintenance, security, cleaning, and utilities. The new RICS professional standard that took effect in December 2025 sets out best practice, but it is not legally binding. Landlords can still charge costs that are unreasonable and tenants have limited power to dispute them. The only way to protect yourself is to scrutinise the budget before signing and negotiate a cap on annual increases. A tenant-landlord lawyer can review the service charge provisions in your lease and flag any exposure.
Ignoring the dilapidations clause at exit
Most commercial leases require you to return the property in the same condition as when you took it. That is called dilapidations. If you have installed partitions, cabling, or a kitchen, the landlord can demand you remove everything and repaint. The bill can run to tens of thousands of pounds. The fix is simple: ask for a schedule of condition, with photos, at the start of the lease. That limits your liability to damage beyond what was already there. If the landlord refuses, that is a red flag.
Overlooking the insurance rent clause
Many leases require you to pay the landlord’s building insurance as a separate charge. The landlord may receive a commission from the insurer — and you are paying that commission through your rent. Some landlords mark up the insurance by 10 to 15 percent. You can ask to see the insurance policy and the premium, and request that the charge is passed through at cost with no margin.
How to Spot the Hidden Terms in a Commercial Lease
Understand the rent review mechanism before you sign
The rent review clause is usually buried in the middle of the lease. It will say something like “the rent shall be reviewed to the then open market rent” — and if it includes the words “but not less than the rent immediately before the review,” you have an upward-only clause. The Law Commission is reviewing whether upward-only reviews should remain legal, but the ban is not law yet. In the meantime, you can negotiate a review that goes both ways, or agree a fixed uplift of, say, 2 percent per year. The tenant’s solicitor should flag this clause, but many do not challenge it because it is standard. My advice: challenge it anyway.
Know what the service charge code does and does not do
The RICS professional standard for service charges in commercial property (2nd edition) took effect on 31 December 2025. It sets out best practice for how service charges should be calculated, budgeted, and reported. But the code itself is clear: it is not legally binding and does not override lease terms. That means if your lease says the landlord can charge whatever they like, the code gives you a talking point but not a legal right. What you can do is use the code as a benchmark during negotiations and ask the landlord to commit to following it in the lease. For a deeper look at this, the guide to legal fees for renting commercial space covers the costs you should expect before signing.
Check whether the lease is contracted out of the LTA 1954
Most business tenancies are protected under the Landlord and Tenant Act 1954, which gives you the right to renew your lease at the end of the term. Landlords can contract you out of this protection, meaning you have no automatic right to stay. The Law Commission is consulting on reforming the contracting out procedure, grounds for recovery, and compensation on termination. If you are signing a lease that is contracted out, you need to know that your business is at risk of having to move at the end of the term. Factor that into your fit-out spend and your business plan.
Consider the emerging trend of flexible and managed office space
Flexible offices are not just for start-ups anymore. CBRE forecasts that flexible space will reach 20 percent of the London office market by 2030, up from about 12 percent today. Enterprise-grade managed offices for teams of 30 or more cost an average of £828 per desk per month in London — a 40 percent premium over standard serviced offices. That premium buys you flexibility and a shorter commitment, but it also means you are paying more per square foot than a conventional lease. If your business is growing or uncertain, the flexibility may be worth the premium. If you are stable and plan to stay put, a conventional lease with a well-negotiated rent review is likely cheaper over five years.
Frequently Asked Questions About Commercial Leases
Can I challenge an upward-only rent review if the market has fallen? ▾
What happens if my landlord refuses to follow the new RICS service charge code? ▾
How long does a commercial lease typically last? ▾
What is a break clause and why does it matter? ▾
Can a community group block the sale of my building? ▾
What is the new register of contractual controls? ▾
The Market Is Moving in One Direction
The commercial property market in 2026 is rewarding quality and punishing mediocrity. Prime buildings with good sustainability credentials, strong locations, and flexible lease terms are attracting tenants and investors. Secondary stock is struggling. The regulatory direction is also clear: upward-only rent reviews are likely to be banned, community rights are expanding, and service charge transparency is being pushed — even if the code is not yet law. Tenants who understand these shifts before they sign a lease will have more leverage and lower costs over the long term. Those who rely on what the landlord tells them will pay for it.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read High Street Hustle: Can Independent Retailers Survive Sky-High UK Rents?.
Sources and Further Reading
Essential Advice for Leasing Mixed-Use Tower Commercial Space — A practical guide to negotiating leases in complex multi-use buildings, covering service charges, access rights, and zoning issues.
Understanding Landlord Service Charge Audit Fees in the UK — Explains how service charge audits work, who pays, and what tenants can do to verify charges.
Charles Russell Speechlys (2026). UK Real Estate Sector 2026 and Beyond. 🔗
Savills (2026). UK Cross-Sector Outlook 2026 — Commercial. 🔗
CBRE (2026). UK Real Estate Market Outlook 2026. 🔗
Spaces to Places (2026). UK Commercial Property Market: Offices & Flex 2026. 🔗
