Mezzanine floor cost: key facts
- There is no official or reliable public price list for mezzanine floors. A quote is a priced design for your use, load, building and approvals.
- The design load sets how heavy the steel and decking must be. HSE guidance says floors used with pallet trucks must be designed for wheel loads and braking forces as well as the stored goods.
- The column grid is a trade-off: wider spacing gives clearer space below but needs deeper, heavier beams and puts more load through each column into the slab.
- Fire protection can be a whole cost line or none. In England, a storage-only floor can go without fire resistance only if it meets every condition in Approved Document B paragraph 7.7.
- Stairs, gates, handrail, design and fees don't shrink with the floor, so smaller mezzanines tend to cost more per m².
- Building control fees are set by each local authority under its own charging scheme, based on its costs. Private registered approvers negotiate theirs. There's no national fee.
How is a mezzanine floor quote built?
A mezzanine floor is priced from a design, not a catalogue. The designer chooses column positions, beam sizes and decking to carry your load across your space, then adds stairs, edge protection, loading points, any fire protection, services, design work, approvals and installation. Each of those is a separate decision, and each one moves the price.
Most quotes follow the same shape, even if the layout on paper differs:
- Brief. Use, size, load and how goods get up there.
- Scheme design. Column grid, beams and deck to suit the load and space. This sets the weight of steel, the core of the price.
- Access and safety items. Staircases, handrails and kick plates on the open edges, and pallet gates or other loading points.
- Fire and services. Fire protection if the floor needs it, plus changes to lighting, sprinklers, alarms, power and heating.
- Design and approvals. Structural calculations and drawings, building control, and sometimes planning.
- Delivery and installation. Labour, access equipment and any out-of-hours or phased working.
The first two steps decide most of the money and depend on information only you have. A quote given without asking about loads, columns or the slab is a rough guess. For the parts of a mezzanine, see our mezzanine floors guide.
How does the size and shape of the floor change the price?
A bigger floor costs more in total but usually less per m², because stairs, gates, design and fees cost much the same whatever the size. Shape matters too: every open edge needs handrail.
Split the costs into the ones that grow with area and the ones that don't.
| Grows with floor area | Grows with open edge length | Roughly fixed per floor |
|---|---|---|
| Columns, beams and joists; decking; fire-resisting ceiling (if needed); lighting under the deck | Handrail, intermediate rails and kick plates; fascia panels where fire protection is needed | Each staircase; each pallet gate; design and calculations; building control; mobilising the installation team |
Three things follow from that:
- Small floors cost more per m². The fixed items are spread over fewer square metres.
- Using walls saves edge. A floor against two walls has two fewer edges to guard than one in the middle of the building.
- Size can switch costs on. Passing certain dimensions can change the fire protection answer or the number of escape stairs. Ask for prices at two or three sizes to find the steps.
How does the design load affect mezzanine floor cost?
The heavier the load the floor is designed for, the more steel and the stronger the deck it needs. Light shelving, pallets moved by pallet truck, offices and machinery all lead to different designs. HSE guidance says a floor used with pallet trucks must be designed for the goods, the wheel loads and the forces from acceleration and braking.
Designers work to a spread load (in kN/m²) for the use, plus point loads from things like shelving feet, machine legs and truck wheels. Both feed into the price:
- Spread load sets the size of the beams and joists, and how many there are.
- Point loads mostly decide the decking: a deck that's fine for hand-loaded shelving may not take pallet truck wheels.
- Dynamic loads. HSE's warehouse guidance (HSG76) says that where pallet trucks, hand or powered, or other wheeled equipment are used, the floor and structure should be designed for the static load of the goods, the wheel loads, and the dynamic effects of acceleration and braking.
The risk runs both ways. Over-specify and you pay for steel you'll never use. Under-specify for a lower price and the load notice will be below what you need; HSG76 says mezzanines should be clearly marked with their safe load-bearing capacity. Strengthening a finished floor is far more disruptive than designing it right.
- what will stand on the floor: shelving, pallets, machines, desks
- the heaviest item, any pallet trucks or trolleys, and likely changes of use
Ask every supplier to state the design load and point loads in writing. Our guide to mezzanine floor loads explains both.
How do the span and column grid change the cost?
Wider column spacing gives clearer space underneath but needs deeper, heavier beams, and each column puts more load into the slab. Tighter spacing uses lighter beams but puts more columns in the way.
The column grid is where the cost and the way you'll use the space below meet most directly.
Wider grid
- Fewer columns in the way of trucks, packing lines and racking below.
- Longer spans, so deeper or heavier beams that take headroom.
- Each column carries more, so each base plate pushes harder on the slab.
Tighter grid
- Lighter, shallower beams and more headroom.
- More columns, which can clash with doors, docks, aisles and exits.
The slab: the hidden cost driver
Every column load ends up in the ground-floor slab. If it's thin, cracked or of unknown build, the design may need bigger base plates, more columns or slab work. If nobody has checked the slab, that cost isn't in the quote yet. Ask whether a slab assessment is included and what happens to the price if it finds a problem.
How do decking, lighting and sprinklers affect the price?
The deck is chosen for load, wear, light, sprinklers and fire, so its cost follows what the floor has to do. Lighting under the deck and sprinkler changes are often priced separately, or by other contractors, so they're easy to miss.
Decking
Decking options include boards, steel plate and open grating or mesh. Each one answers a different question:
- Load and wear. Pallet truck wheels, heavy point loads and trolley traffic need a tougher deck than hand-loaded shelving.
- Light, sprinklers and fire. An open deck lets some light through; a solid deck can stop roof sprinklers protecting the area below, and where fire protection is needed the deck is part of it.
Ask each supplier which deck they've priced and why.
Lighting
The area below loses roof light and high-level fittings. HSG76 says platforms people work on need adequate lighting. Budget for lighting under the deck, on top of it if needed, and power.
Sprinklers and alarms
If the building has sprinklers, talk to your sprinkler contractor and insurer before the design is fixed. Alarm detectors and sounders may also need extending. These often sit with other contractors, so get them priced alongside the floor.
When does fire protection add to mezzanine floor cost?
In England, a mezzanine is normally treated as an element of structure that needs fire resistance. A storage-only floor can go without it only if it meets every condition in Approved Document B paragraph 7.7, including size limits. If it doesn't, budget for fire-resisting ceilings, column casings and fascias, or for the detection or sprinklers that change the size limits.
For cost planning, fire protection is a switch rather than a sliding scale. Approved Document B (Volume 2, England) treats a gallery as an element of structure needing fire resistance, even in a single-storey building. Paragraph 7.7 lets a raised storage floor go without it only if all of these apply:
- one tier, used for storage only
- few people use it, and none are members of the public
- it's open above and below to the room it's in
- means of escape follow the guidance
- it's no more than 10 m in width or length and no more than half the floor area of the space
With automatic fire detection and alarm on the lower level the limit becomes 20 m; with sprinklers throughout, there's no size limit; other sizes only if agreed with building control and the fire and rescue service.
So use decides first: offices, busy picking floors and public areas fall outside the concession. Then size can be a choice: for a storage floor just over a limit, compare fire protection with detection, or with a slightly smaller floor. Budget for fire protection until your designer and building control confirm you don't need it. The conditions are explained in our mezzanine building regulations guide; Wales, Scotland and Northern Ireland have their own guidance.
What do stairs, pallet gates and edge protection add?
Each staircase and each pallet gate is a fixed item, so the number you need matters more than the floor size. The number of stairs depends on how many people use the floor and on escape distances; handrail depends on how many metres of edge are open. These are safety items, so the question is how many you need, not whether to have them.
Staircases
The number of staircases depends on escape. Approved Document B links escape routes to the number of people and travel distances; for normal-hazard storage and industrial uses, Table 2.1 sets 25 m where escape is in one direction only and 45 m where there's more than one. A long or busy floor may need a second stair. Approved Document K says industrial stairs should be designed to BS 5395-3 or BS 4211, as appropriate.
Edge protection
Every open edge people can reach needs guarding: Approved Document K gives 1,100 mm for floor edges in factories and warehouses. Handrail is usually priced by the metre, so open edge length drives it. See stairs, guarding and access.
Loading points
HSG76 says stock transfer points should be suitably guarded, that a swing-over pallet gate can do this, and that chains or tape aren't robust enough. Each gate is a fixed cost, so plan how many loading points you really need. A goods lift or conveyor is a bigger, separate item. Where people work on the floor, Approved Document M can also bring access between levels into scope; ask building control early.
How are building control fees for a mezzanine worked out?
There's no national fee. In England and Wales each local authority sets its own building control charges in a charging scheme, based on its costs, and private registered building control approvers negotiate their fees directly. Get a written fee quote for your project and put it in your budget as its own line.
The Building (Local Authority Charges) Regulations 2010 make each local authority in England and Wales responsible for setting its own building control charges. The charges must be based on what it costs the authority to provide the service, aiming over time to cover those costs and no more. Each authority publishes a charging scheme with its hourly rate and any standard charges. Where the work doesn't fit a standard charge, the authority must tell you the charge and the factors behind it in writing.
Factors an authority can take into account include the use of the building, the kind of work, the floor area, the nature of the design, the expected duration and number of inspections, the estimated cost of the work, and whether a specialist consultant is needed. GOV.UK says private registered building control approvers negotiate their fees directly with you.
What to check
- Whose budget it's in. Some suppliers apply and include the fee; others leave it to you. Make sure it appears once.
- Application type. Work in a building covered by the Fire Safety Order, such as a warehouse, needs a full plans application in England and Wales.
- Time. GOV.UK says a full plans decision takes up to 5 weeks, or 2 months with your consent. Allow for it.
Scotland uses building warrants and Northern Ireland district council approval; check fees with them. Planning permission is separate and has its own fee if it applies.
Worked example: how design decisions move a mezzanine quote
In this example, using assumed figures only, a 15 m × 12 m storage floor starts at £35,430 before VAT. Choosing fire protection instead of detection, a heavier deck for pallet trucks, a wider column grid or a second staircase each moves the total by thousands of pounds. The point is the pattern, not the numbers.
A business wants a 15 m × 12 m (180 m²) storage floor against two walls, with one 15 m and one 12 m side open, for hand-loaded shelving. At over 10 m both ways it's too big for the storage-only concession on its own, so the base design assumes fire detection on the lower level (allowing up to 20 m), with every other condition met and agreed with building control.
| Base design line | ASSUMED quantity × rate | Cost (assumed) |
|---|---|---|
| Structure and decking | 180 m² × £110 | £19,800 |
| Staircase | 1 × £3,000 | £3,000 |
| Pallet gate | 1 × £1,500 | £1,500 |
| Handrail and kick plates | 27 m (15 m + 12 m) × £90 | £2,430 |
| Fire detection on the lower level | lump sum | £4,000 |
| Lighting under the deck | lump sum | £2,500 |
| Design and calculations | lump sum | £1,200 |
| Building control (placeholder: get your own quote) | lump sum | £1,000 |
| Total before VAT | £35,430 (£196.83 per m²) |
Now change one decision at a time, keeping everything else the same:
| What changes | Effect (assumed) | New total before VAT | Per m² |
|---|---|---|---|
| A. Fire-resisting ceiling and column casings instead of relying on detection | − £4,000 detection, + 180 m² × £50 = £9,000 | £40,430 | £224.61 |
| B. Heavier design load and deck for pallet truck use | Structure rate £110 → £140: + £5,400 | £40,830 | £226.83 |
| C. Wider column grid to keep a truck route clear below | Structure rate £110 → £125: + £2,700 | £38,130 | £211.83 |
| D. Second staircase needed for escape | + 1 × £3,000 | £38,430 | £213.50 |
What the example shows:
- Fire is a switch. Change A adds no space or strength, yet moves the total more than most choices. Know early which route your floor takes.
- Load moves the core rate. Change B affects every square metre. Adding pallet trucks later is the costliest kind of change.
- Layout below has a price. Change C buys clear space underneath; whether it's worth it depends on the operation.
- Fixed items add up. Change D is one item, but on a small floor it moves the cost per m² noticeably.
Not included: VAT, contingency, sprinkler changes, a slab check, power and installation if priced separately. To build a full budget from your own quotes, including those lines, use our mezzanine floor cost calculator.
What should you ask so mezzanine quotes can be compared?
Send every supplier the same brief: use, design load, size, open edges, loading points, what must stay clear below and what you know about the slab. Then ask each one to state the design load, column grid, deck, fire protection route and exclusions in writing, and whether prices include VAT.
- Use now and later; what goes on the floor, including any pallet trucks
- Size wanted and size acceptable; which edges are against walls
- Height to the lowest obstruction and headroom needed on each level
- A plan of what must stay clear of columns, and what you know about the slab
- Loading points, existing sprinklers, alarms and lighting, and installation hours
The mezzanine floors checklist covers each item in more detail.
Questions to ask each supplier
- What design load and point loads have you used?
- What column grid and beam depths, and what headroom is left?
- Which deck have you priced, and why?
- Is fire protection included? If not, which route under Approved Document B does the design rely on?
- How many staircases and gates, and why that number?
- Is a slab check included, and what happens if it fails?
- Who makes the building control application, and is the fee included?
- What's excluded? Get a written list: lighting, power, sprinkler and alarm changes, delivery, out-of-hours work.
- Is the price before or after VAT? The UK standard rate is 20% (GOV.UK); ask your accountant whether you can reclaim it.
- What do I get at handover? Drawings, calculations, the load notice and the completion certificate.
Enter each quote in the calculator line by line, so a missing item shows as a gap rather than a lower price. If your project includes racking too, see pallet racking cost.
Related guides
Mezzanine floor cost: frequently asked questions
How much does a mezzanine floor cost?
It depends on the size, the design load, the column grid, the decking, whether fire protection is needed, how many stairs and gates there are, services and fees. There's no official or reliable public price list, so the only dependable figure is a quote based on your own brief.
Why don't you give a mezzanine cost per m²?
We couldn't find an official or reliable public source for UK mezzanine prices, and we don't publish figures we can't check. A single rate would also hide the decisions that move the price most, such as load and fire protection.
Why do small mezzanines cost more per m²?
Staircases, pallet gates, design work and building control cost much the same whatever the floor size. On a small floor they're spread over fewer square metres, so the rate per m² is higher.
Does a heavier floor load cost more?
Yes. A higher design load needs heavier beams, more of them or a stronger deck. HSE guidance says floors used with pallet trucks must be designed for the wheel loads and braking forces as well as the stored goods.
Is fire protection always needed on a mezzanine?
No. In England, Approved Document B allows a storage-only floor without fire resistance if it meets every condition in paragraph 7.7, including size limits that change with fire detection or sprinklers. Offices and busy working floors will normally need it. Confirm with your designer and building control body.
How much are building control fees for a mezzanine?
There's no national fee. Each local authority sets its own charges under a charging scheme based on its costs, taking account of things like the type of work, floor area, inspections and estimated cost. Private approvers negotiate their fees. Ask for a written quote.
Do wider column spacings cost more?
Usually the steel costs more, because longer spans need deeper or heavier beams, and each column puts more load into the slab. But fewer columns can save cost or disruption in the space below. Ask for prices on more than one grid.
What is most often missing from a mezzanine quote?
Building control fees, fire protection, lighting under the deck, sprinkler and alarm changes, and a check of the ground-floor slab. Ask each supplier for a written list of exclusions.
Sources
We checked the facts on this page against these sources on 13 November 2026:
- GOV.UK: Building regulations approval – how to apply, fees and costs
- The Building (Local Authority Charges) Regulations 2010, regulation 7 (legislation.gov.uk)
- GOV.UK: Fire safety: Approved Document B
- GOV.UK: Protection from falling, collision and impact: Approved Document K
- HSE: Warehousing and storage: a guide to health and safety (HSG76)
- GOV.UK: VAT rates