Frequently asked questions about steel buildings

Prices and quotes

How much does a steel building cost per m²?

Published kit prices vary widely because the scope of supply differs. One Dutch seller shows about 185 to 225 EUR/m² excl. VAT for kits from 12 x 18 m to 15 x 20 m, foundation and assembly excluded [1]. Another shows, by calculation, about 96 to 205 EUR/m² for 60 to 300 m², delivery excluded [2]. The configurator gives an indicative range excl. VAT, explained in the price per m² guide.

Is the configurator price what I will pay?

No. The configurator gives an indicative range excl. VAT, built from a published cost model: steel by the kg, cladding by the m², doors, transport, assembly and margin. The binding price comes in the quote, after a stability study of your actual site, with its snow and wind loads. Prices on the site are indicative. See the price index.

What is not included in a kit price?

Unless stated, the price excludes foundations and slab, the permit and architect, earthworks and electricity. For foundations, German sources give 40 to 90 EUR/m² of hall [3], and 55 to 95 EUR/m² for an industrial concrete slab [4]. No sourced Belgian price was found, so these are orders of magnitude. See the foundations guide.

Are prices excl. VAT, and which VAT applies?

The main prices on the site are excl. VAT, and the amount incl. VAT is shown next to them, at the standard rate of the delivery country: 21 per cent in Belgium [5] and the Netherlands [6], 17 per cent in Luxembourg [7]. Prices for businesses are excl. VAT. For a non-residential hall or shelter the standard rate applies in principle, since reduced rates target housing: to be verified for works on buildings.

Permits

Do I need a permit for a steel hall or barn?

Generally, yes. In Wallonia the exemptions cover small works (a carport up to 40 m², outbuildings up to 75 m² in an economic activity zone under conditions) and list no agricultural shed [8]. In Flanders, agricultural buildings remain subject to a permit [9]. In the Netherlands, the list of permit-free structures contains no hall or shed [13]. Thresholds change and local rules apply: to be verified.

Is an architect compulsory in Belgium?

For a building that needs a permit, an architect is in principle compulsory for the plans and the supervision of works, under the law of 20 February 1939 [11]. The regions list exemptions, such as outbuildings, garages and carports up to 40 m² in Flanders [10], but the lists consulted contain no barn or hall [8][10]. The profession of architect is incompatible with that of contractor, so the company that sells and erects the kit cannot be the project's architect [11]. Possible agricultural and industrial exceptions are to be verified.

Can I put up a carport without a permit?

In Wallonia, a single carport is exempt up to 40 m², 2.50 m at the eaves and 3.50 m at the ridge, directly linked to the road and not beyond the rear elevation of the main building [8]. In Flanders, detached outbuildings, carports included, are exempt up to 40 m² in total per property and 3.5 m high, at set distances from the boundaries and within 30 m of the house [9]. The Walloon thresholds date from 2021 and local rules can restrict: to be verified. Hallfort never promises that a permit will be granted.

And in the Netherlands and Luxembourg?

In the Netherlands, a shed or agricultural stable is not in the list of permit-free structures we read [13]. Two tracks are checked separately: the omgevingsplanactiviteit, under the municipality's rules, and the technische bouwactiviteit, which needs either a permit or a notification with a quality assurer (kwaliteitsborger) under the Wkb depending on how the project is classified, to be verified [12]. In Luxembourg the building authorisation is issued by the mayor [14], and agricultural buildings in the green zone also need the Minister of the Environment's authorisation [15]. A draft grand-ducal regulation published in December 2021 would require timber cladding for sheds in the green zone, and its adoption status is to be verified [16].

Technique and standards

What is EN 1090 and CE marking for a steel structure?

Under EN 1090-1, the fabricator of a load-bearing steel structure must have its factory production control certified by a notified body, then CE mark the product with a declaration of performance (DoP, or DoPC depending on the regime that applies to the product) [17]. A reseller cannot CE mark: it is a distributor, unless it sells under its own brand and then becomes the manufacturer [18]. See the EN 1090 guide.

Which execution class (EXC) do I need?

Classes EXC1 to EXC4 set how demanding fabrication is. They follow the consequences of failure: a British article cites EXC1 for agricultural buildings and EXC2 for buildings in general [19]. Hallfort requires EXC2 by default, and EXC1 only for some agricultural buildings if the engineer confirms it.

How are snow and wind loads determined?

In Belgium the ground snow load is 0.5 kN/m² up to 100 m altitude [20]. The basic wind speed is 23 to 26 m/s depending on the postcode [21]. These values come from the Eurocodes and their national annexes, and the stability study confirms them for your site. See the snow and wind guide.

What do the "standard" and "high" load classes mean?

"Standard" stands for the Benelux lowlands. "High" stands for the Belgian Ardennes above about 400 m, the North Sea coast and exposed sites. They are pricing classes, not Eurocode zones. The stability study remains the final check.

Do fire regulations affect a steel hall?

In Belgium, new industrial buildings are classed by fire load: class A up to 350 MJ/m², B from 350 to 900, C above that, and class C is assumed if the client states nothing [22]. Fire stability requirements depend on the category of the structural element and on the compartment size, and the engineer checks which apply to your hall [22]. For example, a single-storey compartment whose structure has no determined fire resistance is limited to 2,000 m² in class C, or 5,000 m² with R 30 or more [22]. Single-storey buildings of 100 m² or less are excluded, and the position of non-industrial agricultural buildings, the Netherlands and Luxembourg is to be verified.

Delivery and assembly

What is the lead time?

Observed lead times vary: 6 to 8 weeks after agreement at one Dutch seller [23], about 10 weeks at another [24], 6 weeks for a standard kit and 12 for a custom one at a third [25], 10 to 15 weeks after signed plans at a French-language seller [26]. Hallfort has no fixed lead time yet, as no partner fabricator is signed. The lead time will be stated in the quote.

Is assembly included, and is a crane needed?

Assembly will be optional and carried out by partner crews still to be selected. In the configurator you can switch it off, and the carport range is priced without assembly by default. For scale, one German source quotes 8,000 to 18,000 EUR to hire a 30 to 50 t mobile crane for 7 to 14 days, to be validated in Belgium [3].

Do you deliver to the Netherlands and Luxembourg?

Belgium, the Netherlands and Luxembourg are the first target markets. For goods shipped and then installed by the supplier or on its behalf, the place of supply is the place of installation (article 36 of Directive 2006/112/EC) [27]. For a Belgian supplier erecting a hall in the Netherlands or Luxembourg, VAT therefore falls in the country of installation, with registration or reverse charge depending on the client: to be verified with a tax adviser.

About Hallfort

Who is Hallfort?

Hallfort is a Belgian company being created, not registered yet. It will sell kit steel buildings: agricultural buildings, storage halls, insulated halls, garages and workshops, carports and shelters, canopies, first in Belgium, the Netherlands and Luxembourg. It sells, configures, prices and coordinates. It does not fabricate the structure itself.

Who fabricates the structure?

The structure will be fabricated and CE marked by partner fabricators certified to EN 1090-1, in execution class EXC2 by default. These fabricators will be selected before opening: no partnership is signed yet and Hallfort names none. Hallfort itself holds no certification and does not affix CE marking itself: the declaration of performance will be the fabricator's.

Does Hallfort help with the permit file?

Yes. Hallfort helps put the file together: plans, the fabricator's structural calculation notes and coordination with your architect. It does not replace the architect and never promises that a permit will be granted. See the permit guide by region.

Can I order online?

Not for now: there is no online payment. You configure your building to get an indicative price range excl. VAT, then request a quote. The binding price is set after the stability study of your site.

Sources

  1. Optistaal, knowledge base: price of a steel shed, accessed on 2026-10-24
  2. Frisokit, steel building kits, accessed on 2026-10-24
  3. SmartHalls, steel hall prices 2026 (page of 26 January 2026), accessed on 2026-10-24
  4. Rechner-Portal, hall cost calculator (8 October 2026), accessed on 2026-10-24
  5. FPS Finance, VAT rates, accessed on 2026-10-24
  6. Belastingdienst, VAT rates in the Netherlands, accessed on 2026-10-24
  7. Administration des contributions directes (Luxembourg), VAT rates, accessed on 2026-10-24
  8. Walloon Region, small permits nomenclature (CoDT, R.IV.1-1), accessed on 2026-10-24
  9. Codex Vlaanderen, exemptions decree (16 July 2010), accessed on 2026-10-24
  10. Omgeving Vlaanderen, exemption from the architect requirement, accessed on 2026-10-24
  11. Law of 20 February 1939 on the title and profession of architect, accessed on 2026-10-24
  12. IPLO, Building Quality Assurance Act (Wkb), accessed on 2026-10-24
  13. IPLO, transposition tables, buildings that need no permit, accessed on 2026-10-24
  14. Guichet.lu, building authorisation, accessed on 2026-10-24
  15. Administration de la nature et des forêts, presentation on the green zone, accessed on 2026-10-24
  16. Luxembourg Ministry of the Environment, draft grand-ducal regulation on the green zone (December 2021), accessed on 2026-10-24
  17. TÜV, EN 1090 manufacturer certification, accessed on 2026-10-24
  18. FPS Economy, obligations of economic operators (Regulation 2024/3110), accessed on 2026-10-24
  19. New Steel Construction, Specifying the right execution class, accessed on 2026-10-24
  20. BBRI/Buildwise, fact sheet NBN EN 1991-1-3 (2008), accessed on 2026-10-24
  21. KU Leuven, course on wind actions (EN 1991-1-4), accessed on 2026-10-24
  22. FPS Interior, royal decree of 7 July 1994, basic standards (consolidated to 20 May 2022), accessed on 2026-10-24
  23. Optistaal, home page (lead times), accessed on 2026-10-24
  24. Finish Building, lead times, accessed on 2026-10-24
  25. Huisman Belgium, bouwpakket (lead times), accessed on 2026-10-24
  26. Batimentsmoinschers, announced lead times, accessed on 2026-10-24
  27. Directive 2006/112/EC, article 36 (copy hosted by legislation.gov.uk), accessed on 2026-10-24