Office mezzanine floors
An office mezzanine builds a new floor of workspace inside a warehouse, workshop or tall unit: desks, meeting rooms, a canteen or a supervisor's office over the shop floor. Because people work on it all day, it is treated as a proper floor for fire safety, with a fire-rated ceiling and column casings, a staircase that meets the regulations and protected routes out. The floor itself typically costs £17,700 to £42,500 for 100 m², before partitions, heating and decoration.
A free matching service, not a mezzanine floor installer. We find one who covers your area and tell you who they are before anything is shared. How it works
When an office mezzanine is worth it
- Staff currently work in a cabin, a corner of the warehouse or rented space elsewhere.
- You have at least 5 metres of clear height, so both levels keep 2.4 metres or more of headroom.
- Managers want to see the operation from above.
- The business is growing but a move would mean new premises, staff travel and downtime.
- You need meeting space or a canteen near the operation for welfare or customer visits.
- The building already has space for a second escape route if the floor will be large.
What an office mezzanine costs
| Job | Typical price |
|---|---|
| 50 m² office floor Fire-rated ceiling and casings, one stair, lighting | £13,600 to £30,700 |
| 100 m² office floor Fire-rated ceiling and casings, one stair, lighting | £17,700 to £42,500 |
| 200 m² office floor Fire-rated ceiling and casings, one stair, lighting | £24,700 to £64,900 |
| 100 m² office mezzanine, published Western Industrial: structure with fire protection, fit-out extra | £25,000 to £45,000 |
| Published fully installed rate Office floors, The Mezzanine Company | £450 to £600 per m² |
Ranges built from published figures: The Mezzanine Company (July 2026), Western Industrial (October 2026), Checkatrade (September 2026) and MyBuilder (October 2026), read 26 October 2026. Each includes one staircase, handrail on two open sides and building control. Figures exclude VAT at 20%, which most VAT-registered businesses can reclaim. A guide, not a quote. Partitions, suspended ceilings over the deck, heating, data and decoration are fit-out and priced separately. The cost calculator works out a range for your floor.
What a good quote includes
Ask for these six points in writing. Two quotes that cover them can be compared line by line.
Design load, in writing
The uniformly distributed load in kN/m² and the point load the deck is designed for. Offices are often designed at 3.5 kN/m²; some installers suggest 4.8 kN/m² so the floor can take storage later.
Plan, grid and heights
A drawing with the deck size, column positions, the finished floor level and the clear height left under and over the deck.
Deck and finish
Board type and thickness (for example P5 chipboard, plywood, steel or concrete), plus any anti-slip or painted finish.
Fire protection
The fire-rated ceiling, fascia and column casings, the rating period, smoke detection, emergency lighting, and fire-rated partitions around enclosed rooms.
Stairs, handrail and gates
How many staircases, their width, the handrail and edge protection, toe boards and any pallet gates, each priced as a line.
Building control and handover
Who applies for building regulations approval, whether the fee is included, and what you receive at the end: calculations, drawings, completion certificate and a loading notice.
Thinking about an office mezzanine? Tell us about the building and we will find an installer who covers your area.
Ask for a free quoteHow an office mezzanine is usually delivered
Survey
The installer measures the building, checks the slab, columns, lights, sprinklers and doors, and asks what the floor will carry and how goods and people will reach it.
Design and quote
A layout drawing with the load rating, column grid, stairs and fire protection, then a written price. Expect to compare two or three designs, not just prices.
Building regulations
Drawings and structural calculations go to building control, from the council or a registered building control approver, before work starts.
Install
Columns, beams and deck go up first, then stairs, handrail, gates and any fire-rated ceiling and column casings. Most floors take days to a few weeks on site.
Fit-out and sign-off
Partitions, ceilings, power, data, heating and decoration follow the structure, then building control inspects the whole floor and issues a completion certificate.
Questions people ask
How far can staff be from the stairs on an office mezzanine?
Approved Document B sets travel distances. For offices it is 18 metres where there is only one direction of escape and 45 metres where there are alternatives (Table 2.1 of Approved Document B, Volume 2). Large office floors may need a second staircase.
What load rating does an office mezzanine need?
Western Industrial lists 3.5 kN/m² for offices and light commercial use. If the floor might hold files, archives or stock later, ask for 4.8 kN/m² now; it costs far less than strengthening later.
Can a mezzanine office be heated and air conditioned?
Yes. It is fitted out like any office: partitions, a ceiling over the deck, heating or air conditioning, lighting, power and data. Ask the installer whether they manage the fit-out or only the structure.
Does a mezzanine need fire protection?
It depends on use and size. Approved Document B lets small storage-only floors used by few people go without fire-rated construction. Industry guidance such as Western Industrial's fire protection guide reads the limits as storage only, under 20 metres in every direction and no more than half the floor area below; once a floor is bigger, used as offices or production, or open to the public, a fire-rated ceiling and column casings are normally needed. Building control has the final say.
Do I need building regulations approval for a mezzanine?
Yes, in almost every case. A mezzanine adds structure and changes how people escape in a fire, so it is building work under the Building Regulations. The installer usually prepares the drawings and calculations and makes the application to the council or a registered building control approver.
Does an office mezzanine need planning permission?
Usually not, because internal works are not normally development. Planning can come in if the floor changes the use of the building, involves outside works or a listed building, or (in England) adds over 200 m² to a shop. See our guide to mezzanine planning permission.
Get free office mezzanine quotes
Three short steps: where the building is, what the floor is for, and how to reach you. It takes about two minutes, and rough answers are fine.
This is a free matching service, not a mezzanine floor installer. We find one who covers your area and name them to you first. Nobody contacts you until you say yes.
Thanks, your enquiry is in.
- Within one working day we will email or call to tell you which mezzanine floor installer covers your area.
- Your details reach that firm only if you say yes.
- They look at the site and give you a fixed price. No marketing from us, ever.