Mezzanine floor vs moving premises: key facts
- A mezzanine adds floor area, not height and not doors. It won't fix a shortage of loading bays, yard or parking.
- Whether a mezzanine fits is decided by clear height to the lowest obstruction, where the columns can land, and whether the ground-floor slab can carry the column loads.
- In England and Wales, where a lease needs consent for improvements, the Landlord and Tenant Act 1927 says that consent is not to be unreasonably withheld. The landlord can still ask for reasonable costs and, in some cases, a reinstatement undertaking.
- GOV.UK says your business rates could change if you move or make changes to your premises, and to report changes to the Valuation Office.
- If stock is palletised and moved by forklift, using the height with racking may add more storage than a mezzanine.
- Compare both options over the same period, usually to your next lease break or expiry, per extra square metre you'd actually use.
Is a mezzanine floor or moving premises the better answer to running out of space?
Neither in general. A mezzanine suits a shortage of floor area for people-based work in a building with the height, slab and lease to allow it. Moving suits a shortage of things a mezzanine can't add: doors, yard, parking, power, or far more space than the building can hold.
"We're out of space" can mean very different things. Name the actual constraint first.
| What's actually short | Can a mezzanine help? | Other options to consider |
|---|---|---|
| Floor area for picking, packing, kitting, returns or light assembly | Often, if goods can be moved between levels efficiently | Re-layout, shelving changes |
| Office, welfare or meeting space | Often, but office use brings more building regulations work | Portable cabins, offsite office |
| Pallet positions for forklift-handled stock | Rarely the best fit: pallets on a mezzanine need gates, transfer and a heavier floor | Taller or denser racking, narrower aisles |
| Loading docks, doors, marshalling space | No | Changing shift patterns or delivery slots, a move |
| Yard, trailer parking, staff car parking | No | Overflow parking, a move |
| Electrical capacity, eaves height, floor strength for heavier kit | No, and may make some worse | Building upgrades with landlord consent, a move |
A mezzanine also adds stairs, columns and a slower route for goods between levels, so the real gain is smaller than the floor area suggests.
How do you work out how much extra space you actually need?
Start from what you store and do, not from the building. Count pallet positions, pick faces and work areas now and at your planning horizon, then split them into what must stay on the ground floor and what could go upstairs.
- Pick a horizon. Usually your next lease break or expiry.
- Pallet storage. Count current pallet positions, how full they run at peak and what you'll need at the horizon. Our pallet positions calculator estimates how many positions fit in a given area and height, so you can test whether better racking alone closes the gap.
- Pick faces and small parts. Count shelving bays and carton lines.
- People and processes. Packing benches, returns, kitting, offices, canteen. List the area each needs and whether it must be near the docks.
- Flows. How often goods move between storage, picking and despatch.
- Split by level. Mark what must stay on the ground floor (heavy, forklift-handled, high-frequency) and what could go up.
If what could go upstairs is a small fraction of your shortfall, a mezzanine won't solve it. If it's most of it, check whether the building can take one. You can rough out a budget from your own area and rates in our mezzanine floor cost calculator.
What decides whether a mezzanine is even possible in your building?
Three physical checks: clear height to the lowest obstruction, column positions that don't block trucks, doors or exits, and a ground-floor slab that can carry the column loads. If any fails, compare racking or a move instead.
Clear height
Measure from floor to the lowest obstruction, not the eaves: roof haunches, lights, heaters, ducts and sprinkler pipes. Measure in several places. Then do this sum with your own figures:
Ask a designer for the structure depth for your spans and loads. If the sum doesn't fit, a mezzanine is out, or only works over part of the building.
Column positions
Mark truck routes, dock approaches, fire exits and packing lines that must stay clear. Wider column spacing means fewer columns but deeper beams, using up headroom.
The slab
Each column puts a concentrated load into the floor slab. Find any drawings, specification or survey of the slab. If there's nothing, a mezzanine design should include a slab check. A failed check adds cost, which changes the comparison.
Fire, sprinklers and services
A mezzanine can affect sprinkler coverage below it, lighting, heating and escape routes. Talk to your sprinkler contractor and your insurer early.
For more on what a mezzanine is made of and its uses, see our guide to mezzanine floors.
When does using the height with racking beat a mezzanine?
When the shortage is forklift-handled pallet storage. Extra beam levels, taller frames or denser racking can add positions without a second floor, if your trucks can reach, the slab and sprinklers allow it, and the racking is properly redesigned.
- Racking suits full pallets, forklift handling and stock that doesn't need people working among it.
- A mezzanine suits people: hand picking, packing, kitting, offices and light assembly.
- Combinations exist. Walkways between racking runs let people pick on several levels while forklifts replenish.
Checks before going higher with racking
- Truck reach. Can your forklifts or reach trucks safely lift to the new top level, loaded?
- Redesign, not just more beams. HSG76 says not to alter racking without consulting the manufacturer, to establish the design limits before moving adjustable components, and to amend the load notice where needed. It says moving the first or second beam from the bottom is normally the most critical alteration and always needs a check of carrying capacity.
- Slab. Base plates need a floor able to take the point load at each one, which rises as racking gets taller and heavier.
- Sprinklers. Ask your sprinkler installer before going taller.
Our guide to pallet racking covers layouts and loads, and pallet racking cost explains how racking quotes are built.
What do you need to check in your lease before building a mezzanine?
Check whether the lease needs landlord consent for alterations, what it says about reinstatement at the end, and when your break dates fall. In England and Wales, consent to improvements isn't to be unreasonably withheld, but conditions can apply. Ask your solicitor.
General information only, not legal advice. Your solicitor should read your lease.
Consent
Many commercial leases stop the tenant making alterations, or structural alterations, without the landlord's consent. Section 19(2) of the Landlord and Tenant Act 1927, which applies in England and Wales, says that where a lease has a covenant against making improvements without consent, that consent is not to be unreasonably withheld. It also says the landlord can require, as a condition:
- payment of a reasonable sum for any damage to, or reduction in value of, the premises or neighbouring premises the landlord owns
- legal or other expenses properly incurred in connection with the consent
- where an improvement doesn't add to the letting value, and where reasonable, an undertaking to reinstate the premises to how they were
Whether a mezzanine counts as an "improvement" under your lease is a question for your solicitor.
At the end of the lease
Leases often require the tenant to remove alterations and put the premises back at the end. Removing a mezzanine and making good is real work: put it in your comparison, even if it's years away.
Timing
Check the years to your next break and expiry, and the notice needed. A mezzanine bought with a few years left has to earn its keep in those years, unless the landlord agrees it can stay.
Will a mezzanine floor change your business rates?
It might. GOV.UK says business rates could change if you make changes to your premises, and to report changes to the Valuation Office. How a particular mezzanine affects your rateable value is a question for the VOA or your rating adviser.
This describes England and Wales. Scotland and Northern Ireland handle business rates differently.
What GOV.UK and the Valuation Office say:
- Rates are based on rateable value: the open market rental value on 1 April 2024, estimated by the Valuation Office.
- Your business rates could change if you move or make changes to your premises. GOV.UK says to report changes to the Valuation Office "to make sure you're paying the right amount and do not get a backdated increase in your bill".
- You report changes, such as floor area sizes, through your business rates valuation account, and you can do so at any time.
- The VOA's guidance for factories, workshops and warehouses says these are typically measured to gross internal area, and it describes the space under a mezzanine floor as an "area under supported floor".
We don't say whether a mezzanine will raise your rates or by how much; that depends on the VOA's valuation of your property. Ask your rating adviser before you commit. For a move, look up the new building's rateable value on GOV.UK's find a business rates valuation service before you sign.
What approvals does a mezzanine need that a move doesn't?
In England a warehouse mezzanine is normally building work needing a full plans application. Planning permission usually isn't needed for internal works, except in shops adding more than 200 m². A move needs neither unless you alter the new building.
This summary describes England. Wales, Scotland and Northern Ireland have their own systems.
- Building regulations. A new floor inside a building affects structure, fire safety and escape. Where the Fire Safety Order applies, which includes workplaces like warehouses, the Building Regulations 2010 require a full plans application rather than a building notice. GOV.UK says a full plans decision comes within 5 weeks, or 2 months with your consent.
- Fire protection. Depending on size and use, the mezzanine may need fire-resisting construction. Check before comparing.
- Planning. Works affecting only the interior of a building generally aren't development. In England, internal works adding more than 200 m² of floor space in a building used for the retail sale of goods (other than hot food) are.
- Fire risk assessment. The responsible person must review it when premises undergo significant changes.
For the detail on full plans, fire resistance, escape and stairs, read our guide to mezzanine floor building regulations.
Which causes more disruption: installing a mezzanine or moving?
It depends on your operation. A mezzanine is built inside a working building, so disruption is local but you work around it. A move disrupts everything at once, after the time needed to find, agree and fit out a new building.
We don't quote typical durations. List the steps and ask each party for their timescale in writing.
| Mezzanine: steps that take time | Move: steps that take time |
|---|---|
| Survey, design and slab check | Finding a suitable building and agreeing terms |
| Landlord consent (often needs drawings first) | Legal work on the new lease and notices on the old one |
| Building regulations approval | Surveys of the new building, including floor and power |
| Steel and decking manufacture | Racking and mezzanine design for the new layout |
| Installation in a cleared zone of the warehouse | Fit-out: racking, offices, IT, power, security |
| Sprinkler, lighting and electrical changes | Dismantling, moving and reinstalling racking, with inspection |
| Completion certificate and updated fire risk assessment | Stock transfer, often with both sites running for a time |
| Staff using the new level | Staff travel, recruitment or retention at the new location |
What goes wrong
- Consent or building control is left until after an order is placed.
- On a move, rent on both buildings runs longer than planned.
- Racking moved to the new building without a matching load notice: SEMA notes that load notices that no longer match the rack are a problem when racking is moved or altered.
When is moving premises the right call instead of a mezzanine?
When growth will outrun anything the building can hold, when the constraint is doors, yard or parking, when the building fails the height, slab or lease checks, or when the lease ends too soon for a mezzanine to pay its way.
Signs that a mezzanine would only delay a move:
- Growth beyond the building. Your space plan at the horizon exceeds what ground floor plus a mezzanine plus better racking can hold.
- Dock and yard limits. Trailers queue, there's nowhere to stage outbound loads, or vehicles can't turn safely. More floor inside doesn't help.
- Loading and handling. Mostly full pallets moving fast: lifting goods to a mezzanine adds handling.
- Staff. More people than parking, welfare or escape routes can support.
- The building itself. Low clear height, a weak slab, a landlord who won't consent on workable terms, or power you can't upgrade.
- Lease timing. The next break or expiry is close, and reinstatement would be due soon after you'd paid for the mezzanine.
A mezzanine is worth pricing when the shortfall is mostly people-based work, the height, slab and columns work, consent looks likely and enough lease years remain. Bolted racking and mezzanine structures can sometimes be dismantled and reused if you relocate later, but ask the designer whether that's realistic for your design before counting on it.
How do you compare a mezzanine with moving, side by side?
Use the same period for both, list every cost line that happens only because of that option, and divide by the extra floor area you'd actually use. The example uses assumed figures to show the method, not market prices.
All figures in this example are ASSUMED and illustrative only. They are not market prices, quotes or typical costs, and they don't predict any outcome. Replace every line with your own quotes and advice.
ASSUMED scenario: a business needs more picking and packing space and has 5 years left on its lease. Option A: a 400 m² mezzanine. Option B: a move to a unit with 1,500 m² more usable space. Period: the 5 years to lease end.
| Cost line (ASSUMED figures) | A: mezzanine | B: move |
|---|---|---|
| Mezzanine structure, stairs, gate, edge protection, fire protection | £90,000 | – |
| Design, slab check and building control | £4,000 | – |
| Sprinkler, lighting and electrical changes | £15,000 | – |
| Landlord's consent costs and legal fees | £3,000 | £15,000 |
| Reinstatement of the mezzanine at lease end | £20,000 | – |
| Extra rent for the larger unit (£50,000 a year for 5 years) | – | £250,000 |
| Rent on both buildings during the changeover | – | £20,000 |
| Dismantle, move, reinstall and inspect racking | – | £40,000 |
| Fit-out of new unit: power, offices, IT, security | – | £60,000 |
| Dilapidations on the old unit brought forward | – | £30,000 |
| Lost output during the work or move | £5,000 | £25,000 |
| Change in business rates | Ask VOA or adviser | Ask VOA or adviser |
| Total over 5 years (excluding rates) | £137,000 | £440,000 |
| Extra usable area | 400 m² | 1,500 m² |
| Cost per extra m² over the period | about £343 | about £293 |
How to read it: in this assumed case the mezzanine costs far less in total, but the move costs less per extra square metre, because it delivers much more space. So the answer turns on how much space the business genuinely needs. If 400 m² covers the need, the move's extra space is paid for and unused. If the need is nearer 1,500 m², the mezzanine leaves a shortfall.
Points the example deliberately shows:
- Only count what differs. Dilapidations fall due at any lease end; for a move, count only the effect of bringing them forward.
- Leave unknowns visible. Rates stays an open line until answered.
- Note what numbers miss, such as a move also fixing dock or yard problems.
Tax, VAT recovery and financing: ask your accountant.
Related guides
Mezzanine floor vs moving premises: frequently asked questions
Is a mezzanine floor cheaper than moving premises?
Often in total, but not always per square metre of extra space, and only if a mezzanine actually covers your need. Compare both over the same period, including consent, building control, services, reinstatement, rates and disruption.
Do I need my landlord's permission to put in a mezzanine floor?
Usually, if your lease restricts alterations or improvements without consent. In England and Wales, the Landlord and Tenant Act 1927 says consent to improvements is not to be unreasonably withheld, though the landlord can ask for reasonable costs and, in some cases, a reinstatement undertaking. Your solicitor should check your lease.
Will a mezzanine floor increase my business rates?
It might. GOV.UK says business rates could change if you make changes to your premises and tells you to report changes to the Valuation Office to avoid a backdated increase. The VOA records the space under a mezzanine as an area under supported floor. Ask your rating adviser or the VOA about your property.
Do I have to remove a mezzanine at the end of my lease?
That depends on your lease. Many leases require alterations to be removed and the premises reinstated at the end, and a landlord can make a reinstatement undertaking a condition of consent where reasonable.
How much clear height do I need for a mezzanine?
Enough for the headroom you need underneath, plus the depth of the beams and deck, plus the headroom you need on top, plus any clearance your sprinkler or lighting designer needs. Measure to the lowest obstruction in several places.
Should I build a mezzanine or add more racking?
If the shortage is pallet storage handled by forklift, taller or denser racking is often the better fit, subject to truck reach, the slab, sprinklers and a proper redesign. Mezzanines suit hand picking, packing, offices and light assembly. Some sites use both.
Can I take a mezzanine floor with me if I move?
Bolted steel mezzanines can be dismantled, but whether yours suits a new building depends on its height, slab and layout. Ask the designer before relying on reuse.
What can't a mezzanine floor fix?
It can't add loading docks, doors, yard space, trailer parking, staff parking, eaves height or power. If one of those is your real constraint, compare a move or other changes.
Sources
We checked the facts on this page against these sources on 13 November 2026:
- GOV.UK: Business rates, if your business or premises change
- GOV.UK: Business rates, how your rates are calculated
- VOA: Helping you make a Check for factories, workshops and warehouses
- Landlord and Tenant Act 1927, section 19 (legislation.gov.uk)
- GOV.UK: Building regulations approval
- HSE: Warehousing and storage, a guide to health and safety (HSG76)