Concrete slab cost per m² for a patio, garage or extension in Belgium (2026)
Short answer: In Belgium, a poured concrete slab costs between €40 and €150 per m² installed in 2026, according to Trustup and SuperBeton (BCI Floors: €45–140). A plain patio is around €50–80 per m² at Trustup; a garage is €45–75 per m² at BCI Floors and €50–120 per m² incl. VAT at SuperBeton. Thickness, reinforcement mesh and finish explain the gap. These are market ranges, not a company price list.
Prices in this article are indicative Belgian market ranges, not Alpha Services Benelux's price list. Your fixed price is in the quote.
How much does a concrete slab cost per m² in Belgium?
Expect €40 to €150 per m² for a concrete slab including installation (Trustup and SuperBeton; BCI Floors quotes €45–140). The exact figure depends on use, thickness, reinforcement and finish, and the guides do not always agree, so we show them side by side.
| Use | Trustup | BCI Floors | SuperBeton |
|---|---|---|---|
| General concrete slab | 40–150 | 45–140 | 40–150 |
| Outdoor, general (all finishes) | — | 55–100 | 60–130 (excl. VAT) |
| Patio, plain | 50–80 | 60–100 | — |
| Patio or driveway with decorative finish | 80–150 | printed-concrete driveway 75–120 | polished 80–120, permeable 90–130 |
| Garage | — | 45–75 | 50–120 (incl. VAT); reinforced 10–15 cm 50–80, polished 80–110 |
Watch the VAT basis: Trustup and SuperBeton (general and outdoor pages) quote prices excluding VAT, SuperBeton’s garage page quotes including VAT, and BCI Floors does not specify. Always ask whether a quote is with or without VAT.
Each range belongs to the guide named; we do not blend them into a new figure. For a patio or garage the price depends heavily on the finish level.
What thickness and reinforcement mesh do you need?
For a patio the reference is 15 cm; for a driveway or garage, 15 to 20 cm. For heavy loads, plan a double layer of mesh.
| Use | Thickness | Reinforcement and notes |
|---|---|---|
| Light indoor slab | 7–10 cm | BCI Floors: €50–75 per m² for 7–10 cm |
| Patio | 15 cm | Fall of about 1.5 cm per metre (SuperBeton) |
| Driveway | 15–20 cm; min. 20 cm for vehicles (SuperBeton outdoor) | At 20 cm with vehicles: double mesh |
| Garage | minimum 12 cm; 15–20 cm usual | Double mesh for heavy or intensive use |
Trustup quotes €40–60 per m² for an unreinforced 10 cm slab and €55–85 per m² for a reinforced 12–15 cm slab. BCI Floors puts reinforcement at €5–15 per m² extra. SuperBeton mentions 8–10 mm steel for houses and spacers to keep the mesh at the right cover.
The slab needs well-compacted ground: SuperBeton mentions a compacted crushed-stone layer with a membrane and, for a garage, a sand bed of about 10 cm. The excavation depth is the slab thickness plus the sub-base and is set by the contractor. Have a professional assess thickness and reinforcement for your load and soil.
Foundations and extensions: what does the structural slab cost?
According to Vakmanprijzen, a full floor slab or foundation costs €92 to €200 per m² (average €145) and strip foundations €120 to €220 per m². That is well above a garden slab because groundwork, formwork and reinforcement are heavier.
| Item | Price range |
|---|---|
| Concrete floor slab or foundation (installation, reinforcement, formwork) | €92–200 per m² (avg. €145); VAT basis inconsistent in source |
| Strip foundation | €120–220 per m² |
| Shallow foundation (light structures, stable ground) | €92–150 per m² |
| Ready-mix concrete, no labour | €95–150 per m³ (Trustup: €120–250 per m³) |
| Concrete pump | €300–700 per day |
| Concrete mixer, flat transport fee (BCI Floors) | €150–300 |
A worked example: 20 m² at 20 cm thick needs about 4 m³ of concrete. None of the sources gives a separate price for an extension; have an architect or engineer assess the structure. For the full cost, see our guide to house extension cost per m² in timber or masonry.
What drives the price of a concrete slab?
Four things matter most: thickness, reinforcement, finish and site access. Surface area and region come next.
- Thickness: BCI Floors quotes €50–75 per m² for 7–10 cm and €85–110 per m² up to 20 cm.
- Reinforcement: €5 to €15 per m² extra (BCI Floors), more with double mesh.
- Finish: power-floated, exposed aggregate, polished or printed concrete; BCI Floors cites €20–50 per m² for polishing or troweling and €10–25 per m² for colour pigments.
- Preparation: formwork €10–20 per m² and removing an old floor €15–35 per m² (BCI Floors).
- Area: above 50 m² the price per m² falls; small slabs cost proportionally more. Pouring patio, driveway and path in one go lowers set-up costs (SuperBeton).
- Region: Vakmanprijzen mentions a 15–20% spread, with Brussels roughly 15% above the average.
For scale: a 20 m² patio at €60–100 per m² (BCI Floors) comes to roughly €1,200 to €2,000. A 30 m² garage at €45–75 per m² (BCI Floors) comes to roughly €1,350 to €2,250.
6% or 21% VAT on a concrete slab?
According to Test-Aankoop, the 6% rate can also apply to a terrace adjoining the house, a driveway from the street to the house and a garage that is part of or adjoins the home. Garden landscaping and fencing are excluded.
The conditions are the same as for other renovation work:
- the home is at least 10 years old (first occupied) and is mainly used as a private residence after the works;
- the contractor supplies the materials and carries out the work, invoicing you directly;
- since 2022 no certificate is needed, a standard statement on the invoice is enough;
- materials you buy yourself stay at 21%.
A slab for a new-build foundation is at 21% (Vakmanprijzen). Edge cases, such as a terrace that does not adjoin the house, are not always judged the same way by every source. Ask the contractor to state the VAT rate applied on the quote.
For possible regional support, check only the official portals of your region (wallonie.be, vlaanderen.be/mijn-verbouwpremie or the official Brussels portal).
Comparing quotes and avoiding surprises
Always compare quotes on the same basis: thickness, reinforcement, finish, VAT rate and what the price includes. A lower price per m² means little if the slab is thinner or unreinforced.
- Ask for thickness in cm, the type of mesh (single or double) and the build-up of the ground under the slab.
- Check whether groundwork, soil removal, formwork and concrete pump are included.
- Have the finish specified (power-floated, exposed aggregate, polished).
- Ask whether the amount is with or without VAT and which rate applies.
- Ask about curing time: SuperBeton mentions about 28 days for full strength.
Alpha Services Benelux, active since 2014, works with its own team and gives a fixed written quote after a site visit. Learn more on our renovation page, read our guide to the renovation budget calculator for a budget estimate, and for paving on a patio or driveway read driveway and patio paving cost per m².
Fixed quote after a site visit
Alpha Services Benelux does the work with its own team, active since 2014. VAT BE 0541.320.178.
Request a quoteFrequently asked questions
How much does a concrete slab cost per m² in Belgium?
According to Trustup and SuperBeton, an installed concrete slab costs €40 to €150 per m² (BCI Floors: €45–140). A plain patio is around €50–80 per m² (Trustup) or €60–100 per m² (BCI Floors). Always check whether the price includes VAT.
What thickness should a patio or garage slab be?
SuperBeton gives 15 cm for a patio and 15 to 20 cm for a driveway or garage, with a 12 cm minimum for a garage. With vehicles, plan at least 20 cm and a double layer of mesh.
How much does concrete cost per m³?
Ready-mix concrete, without labour, costs €95 to €150 per m³ according to Vakmanprijzen and €120 to €250 per m³ according to Trustup. For 20 m² at 20 cm you need about 4 m³. Pump and transport usually come on top.
Is reinforcement mesh required in a concrete slab?
Not always. Trustup quotes €40–60 per m² for an unreinforced 10 cm slab and €55–85 per m² for a reinforced 12–15 cm slab. For a garage or driveway the sources recommend mesh, doubled for heavy loads.
Can a driveway or patio be charged at 6% VAT?
According to Test-Aankoop, yes for a terrace adjoining the house, a driveway from the street to the house and a garage belonging to the home, if the home is at least 10 years old, privately used, and the contractor supplies materials and installation. Garden landscaping is excluded. Have the rate confirmed on the quote.
Sources
- Wanneer en hoe krijg je verminderd btw-tarief van 6% voor werkzaamheden aan je woning? — Test-Aankoop
- Betonvloer Prijs per m²: Kosten Overzicht per Soort (2026) — BCI Floors
- Betonvloer prijs per m² (2026): richtprijzen & offerte — SuperBeton
- Betonvloer buiten aanleggen: prijs per m², afwerking, offerte — SuperBeton
- Betonvloer garage: Prijs per m² 2026, wapening & afwerking — SuperBeton
- Minimale dikte betonvloer: richtwaarden per toepassing — SuperBeton
- Prix dalle béton au m² en 2026 : 40 à 150 € (guide complet) — Trustup
- Prix terrasse béton au m² en Belgique (2026) — Trustup
- Betonplaat: wat is de prijs per m²? - Trustup Blog — Trustup
- Fundering & beton prijs 2026 - wat kost het in België? — Vakmanprijzen.be