How much does a two-storey modular building cost?
A two-storey modular building's cost is shaped by the number of stacked units, internal or external stairs, upper-floor access, fit-out on each level and crane access for installation. Design both floors online to see the total.
Stacking is the right answer when the footprint is the constraint rather than the budget — tight yards, small playing fields, warehouse floors you do not want to give up. Modules stack to two storeys as part of an appropriately designed configuration.
Typical configurations
Choose the mix of unit sizes and fit-out you need. The designer shows the final total for that exact configuration.
| Modules | What it realistically fits |
|---|---|
| 2 modules | One room over one room — office above store, or two offices |
| 4 modules | Two rooms per floor: offices with a WC below and meeting space above |
| 6 modules | Larger two-storey block with WCs, kitchen and separate meeting rooms |
| 8 modules | Substantial two-storey building on half the ground area of a single-storey equivalent |
Typical specification
- •Internal staircase, or an external stair where floor area is at a premium
- •Upper-floor WCs where drainage allows
- •Balustrading and landing arrangement set at design stage
- •Windows positioned per floor for daylight and escape requirements
What your site needs
- •A base engineered for the stacked load — heavier than a single-storey base
- •Crane access, since upper modules are lifted into place
- •Building control sign-off for the stair, escape and fire strategy
- •Planning permission, which is more likely to be required at two storeys
Costs on top of the building
These site-specific items sit outside the designed building total and are quoted for your project.
- •VAT at the prevailing rate
- •A level, load-bearing base or foundation sized to the building
- •Transport to site, quoted on distance and access
- •Offloading, and crane or hiab attendance where access requires it
- •Final connection to mains power, water and drainage by your own contractor
- •Planning permission or building control fees where these apply
P300–P700 range, or bespoke
- P300 unit
- 2.9m × 2.2m externally; approximately 2.7m × 2.0m usable internally (5.4 m² usable internal area per separate unit)
- P400 unit
- 3.9m × 2.2m externally; approximately 3.7m × 2.0m usable internally (7.4 m² usable internal area per separate unit)
- P500 unit
- 4.9m × 2.2m externally; approximately 4.7m × 2.0m usable internally (9.4 m² usable internal area per separate unit)
- P600 unit
- 5.9m × 2.2m externally; approximately 5.7m × 2.0m usable internally (11.4 m² usable internal area per separate unit)
- P700 unit
- 6.9m × 2.2m externally; approximately 6.7m × 2.0m usable internally (13.4 m² usable internal area per separate unit)
- Configuration
- Mix P300, P400, P500, P600 and P700 units to create tailored footprints and shapes
- Bespoke
- Bespoke sizes considered to suit your brief — contact us
- Joined internal space
- Open joins remove the adjoining shell walls and can increase usable space. Final clear area depends on layout and partitions.
- Unit height
- 2.40m external / 2.16m internal
- Storeys
- Up to two storeys, subject to final project design
- Delivery
- UK mainland and Northern Ireland — transport quoted separately
Adacon modular buildings use P300, P400, P500, P600 and P700 units with external lengths of 2.9m, 3.9m, 4.9m, 5.9m and 6.9m, a common 2.2m width and 2.40m external / 2.16m internal height. The sizes can be combined to create more tailored floor areas and building shapes, joined side by side or stacked to two storeys subject to the final project design.
Common questions
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