Platform
The value is not a floating house. It is a repeatable path from a water area to an operating residential community — where each layer has a defined interface, a defined supplier and a defined way of being verified.
Three status levels. System defined means the layer is specified at system level. Engineering scope defined means the discipline and work package are set and ready for a qualified engineer. Site-specific design means the layer is engineered to each location's conditions.
Factory-built homes in three sizes — 30, 50 and 80 m² — sharing one wet core, one electrical and utility interface and one structural logic, so that volume reduces cost instead of variety increasing it.
Engineering scope: External dimensions, areas, structural grid, acoustic separation and energy performance, coordinated across architectural and marine design.
An engineered buoyant platform carrying the module: buoyancy, stability, reserve displacement, compartmentation, inspection access and replaceability over the design life.
Engineering scope: Stability, freeboard, ballast, design loads, durability and corrosion protection.
Restraint of the platform against wind, wave, current and ice, using chains or tension elements to seabed anchors or piles, with an arrangement that tolerates the site water-level range.
Engineering scope: Anchor type, design loads, seabed conditions and redundancy, set by hydrographic and geotechnical survey.
The shared circulation that turns berthed homes into a neighbourhood: a main spine to shore, branch decks to each home, an articulated gangway, and continuous edge protection.
Engineering scope: Clear widths, gradients, guarding, slip resistance and step-free continuity to Swedish accessibility and safety standards.
An all-electric direction: efficient envelope, heat pumps, solar readiness, metering per home and no on-site fossil fuel combustion.
Engineering scope: Energy performance to the Swedish implementation of the Energy Performance of Buildings Directive, with a project energy model.
Potable water supply and wastewater collection routed through an inspectable service duct under the shared deck, connected to shore systems.
Engineering scope: Connection terms, capacity, freeze protection and discharge, coordinated with the local utility and environmental authority.
Instrumentation of the things that matter over a long life: mooring loads, water ingress, energy and water use, and the condition of replaceable components.
Engineering scope: Instrumentation scope, data ownership and how monitoring supports insurance and lending.
Planned inspection, maintenance and component replacement — the part that determines whether the asset is financeable and insurable over decades, and how it performs across its life.
Engineering scope: Service model, intervals, cost and responsibility split between DONSÖ, the project company and the operator.
Concept diagrams
These schematic principles structure the engineering work and supplier conversations, and are refined into design documents during the validation phase.
Scope