Cold hall or insulated hall
The largest price step in warehouse work is thermal insulation. An uninsulated cold hall for temperature-insensitive goods and a fully insulated hall with office and welfare areas sit far apart at the same ground area.
Market overviews give two ends for a 500 m² hall, turnkey, that sit a factor of 3 apart. The per-square-metre figure shows the same distance.
| Version | Total at 500 m² | Per m² |
|---|---|---|
| Uninsulated cold store | around 200,000 € | about 400 € |
| Insulated hall with office | over 600,000 € | over 1,200 € |
| Gap | factor 3 | factor 3 |
The decision is not purely one of capital cost. Once the hall is to be heated, insulation becomes a mandatory investment whose payback through heating costs shows within a few years. For pure storage without temperature requirements an uninsulated envelope is sufficient, and any additional insulation there is wasted expenditure.
Practical consequence for cost estimating: the temperature requirement is the first question in the brief, not a specification decision taken later. It determines the order of magnitude of the entire scheme.
The floor slab is the decisive item
In warehouse work the floor slab carries an importance it has in no other building type. It is simultaneously foundation, working surface and operational equipment, and it must be designed for the use actually intended.
Four quantities govern, and all four follow from the use rather than from the hall size. The last is the most often underestimated.
| Quantity | Effect |
|---|---|
| Distributed load | follows from the stored goods and stacking height |
| Point load | follows from the racking configuration and rack feet |
| Traffic | forklift type, axle loads and frequency |
| Flatness requirement | rises sharply with narrow-aisle racking and automated systems |
The last is the most frequently underestimated. A hall for conventional storage and a hall for narrow-aisle equipment differ considerably in floor flatness requirements, and the associated construction and finishing processes are correspondingly demanding.
The floor slab is therefore the item where a subsequent change of use becomes most expensive. A hall designed for a lighter use cannot readily be upgraded for a heavier one. Where the future use is unknown, the reserve should be planned deliberately and recorded rather than silently omitted.
Fire safety and sprinklers
Fire safety carries the greatest step risk in warehouse work. It depends not primarily on the construction method but on hall size, compartmentation and above all on the goods stored.
A sprinkler installation changes the cost structure of a scheme fundamentally. It requires its own water supply with storage tank and pump set, it occupies floor area, it acts on the structure through the additional weight of pipework at roof level, and it generates ongoing inspection and maintenance obligations.
Conversely, sprinklers can permit larger fire compartments and thereby save cost elsewhere. Whether they are economic is therefore not decided in isolation but in interaction with compartmentation and with what the applicable state law permits.
For early cost estimating it follows that the fire safety classification comes before the cost estimate, not after it. A sprinkler installation found to be necessary later is the commonest single cause of budget overrun in hall construction.
Doors, loading and daylight
Three groups of items with noticeable weight disappear inside flat square metre prices. They arise on every logistics warehouse.
| Group of items | Order of magnitude | What the quantity depends on |
|---|---|---|
| Doors | standard sectional door in the mid four-figure range each, large sliding door well above | the logistics concept, not the hall size |
| Loading equipment | own block with lorry access: dock levellers, dock shelters, ramps | ground level or dock level, acting on earthworks and external works |
| Daylighting | roof lighting strips over roughly 10 % of the roof, some tens of euros per m² of hall area | tied to fire safety through smoke and heat extraction |
Hall height is underestimated
The square metre price conceals height, even though it is one of the most effective cost quantities in warehouse work. A taller hall costs more per square metre but delivers considerably more storage volume.
Height acts structurally and operationally in opposite directions, and that determines which reference unit measures viability. The price per square metre rises while the price per cubic metre of storage volume falls.
| Direction | Effect |
|---|---|
| Structural | larger column sections, foundations, wall areas, wind loads |
| Operational | storage capacity grows with stacking height while ground area, floor slab, roof and site stay the same |
| Limited by | permissible building height under the local plan; above certain heights, sharply stricter requirements for suppression and smoke extraction |
For viability the governing measure is therefore not cost per square metre but cost per cubic metre of usable storage volume, or per pallet position. Two halls at an identical square metre price can differ considerably on that measure.
The limit is set not by the structure but by planning law and fire safety: permitted building height follows from the development plan, and above certain building and storage heights the requirements for suppression and smoke extraction tighten in steps. Both must be checked before any decision on height.
Automation changes the building
An automated high-bay warehouse is not storage inside a hall but an installation that either carries a building or is enclosed by one. The cost logic shifts fundamentally as a result.
Two forms are to be distinguished, and they lead to different cost models. In both, construction and installation costs can no longer be separated meaningfully.
| Form | Structure | Consequence for the benchmark |
|---|---|---|
| Silo-type | the racking carries the envelope | the building in the classical sense largely disappears |
| Enclosed | conventional hall, correspondingly tall, very tight tolerances | per-m² hall benchmark no longer suitable |
In both cases the requirements for flatness, dimensional accuracy and settlement behaviour are considerably higher than for conventional storage, and construction and equipment costs can no longer be meaningfully separated. A hall benchmark per square metre ceases to be a suitable measure here.
What the square metre price routinely omits
Published figures are turnkey from the floor slab or from top of foundation. Several items are not normally included in them.
| Item not included | Cost group | Note |
|---|---|---|
| The site | n/a | often the largest single item in commercial work |
| Servicing and utility connections | 200 | |
| External works: access roads, manoeuvring and parking areas | 500 | with lorry traffic can reach the order of the hall area itself |
| Ancillary construction costs | 700 | |
| Storage and racking equipment | n/a | plant, not building investment |
The third point deserves particular attention. For a logistics hall with lorry traffic, the paved external areas can be of the same order as the hall area itself. They belong in cost group 500 and are precisely not inside the hall benchmark. The system of cost groups is set out in the article on the cost scope of a benchmark.
Related articles
The orders of magnitude given are indicative values for Germany. They do not replace a project-specific cost estimate and vary considerably by specification, hall size, stored goods, ground conditions and location.