Backyard ADU Manufacturer & Supplier for Belgium

In Flanders, detached outbuildings up to a cumulative maximum of 40 square meters per property often fall under the notification exemption (*vrijstelling / meldingsplicht*) if they stay below 3.5 meters in height and adhere to boundary setbacks (usually 1 to 2 meters from neighboring garden borders). However, if the ADU is intended for permanent residential living or care housing (*Zorgwonen*), specific municipal regulations apply. In Wallonia (*Permis d'urbanisme*) and Brussels, municipal rules vary. We provide structural drawings and technical documentation to assist your local architect or municipality submission.

Our ADUs are manufactured with pre-installed European-standard plumbing and electrical distribution conduits (CE certified, 230V single-phase / 400V three-phase ready). Utilities are tied directly into your primary dwelling’s existing meters via underground trenches. Wastewater can connect to the main sewer line via gravity slope or a compact macerator pump unit.

Due to the rigid steel frame of container and space capsule ADUs, heavy continuous concrete slabs are rarely required. We recommend screw piles (schroeffunderingen) or concrete point foundations (poeren). Screw piles install in a single day, leave garden soil undisturbed, provide excellent moisture protection from below, and allow easy removal if the unit is relocated.

Yes. Our units utilize 80–120mm closed-cell PU insulation or rockwool thermal barriers, thermal-break double/triple glazed Low-E glass, and integrated air-to-air heat pump inverter systems (heating & cooling). This maintains comfortable 21°C interior temperatures even during Belgian sub-zero winter spells or 35°C summer heatwaves with minimal energy consumption.

Units arrive at the destination port (Antwerp or Zeebrugge) on standard flatbed trailers. For properties in dense Belgian towns or row houses with no rear driveway access, a local mobile crane lifts the complete unit safely over the primary house into the backyard in approximately 2 to 4 hours. Alternatively, flat-pack kit models can be carried through narrow side gates for manual assembly.

Factory production typically takes 25 to 35 days depending on customization features. Ocean transport to the Port of Antwerp takes approximately 28 to 35 days. In total, your project can transition from design approval to on-site installation within 8 to 10 weeks.