DONSÖ WATER
Discuss a feasibility study

Reference concept

DONSÖ ONE — Gothenburg Harbour Region

DONSÖ ONE is the first commercial reference project: 50 homes targeted for price-accessible owner-occupation on shared marine infrastructure, designed for a suitable sheltered location in the Gothenburg Harbour Region. It provides a concrete basis for site evaluation, engineering, project economics and partner discussions.

Concept visualisation of the DONSÖ ONE community: five finger piers of berthed homes served by a shared shore hub in a Gothenburg harbour basin
DONSÖ ONE — Concept visualisation. Five residential piers and a shared shore hub in the Gothenburg Harbour Region.

01 / Programme

50 homes, three sizes, one resident-owned community

Home typeCountTarget area
DONSÖ 3030≈ 30 m²
DONSÖ 5015≈ 50 m²
DONSÖ 805≈ 80 m²
Total50≈ 2,050 m²

Tenure

50 homes targeted for price-accessible owner-occupation in a resident-owned community. Price-accessibility cannot be proven until final prices, association debt, monthly fees and household incomes are set; the final legal ownership structure — the housing cooperative or equivalent form, property formation, VAT treatment and association financing — is developed with Swedish property, tax and cooperative-housing counsel, and is not yet fixed.

Programme and shared scope

  • Shared access decks and a main shore gangway
  • Energy supply and per-home metering
  • Potable water and wastewater
  • Mooring and marine systems
  • Digital monitoring of the shared assets
  • Emergency and service access
  • Possible charging for mobility and small electric boats

02 / Concept drawings

Site plan

A main access spine from shore serves five finger piers with ten homes each. Geometry is illustrative and depends on navigation, depth, wave exposure, fire access and permits.

Concept site plan: a land connection and gangway lead to a main access spine serving five finger piers, each with ten berthed homes in 30, 50 and 80 square metre sizes, with a shared hub at the shore end. Indicative water footprint approximately 210 by 155 metres.
DONSÖ ONE site plan — Indicative water footprint approximately 210 × 155 m. Final geometry depends on navigation, depth, wave and ice conditions, fire access and permits.

Reference geography. Final location subject to site agreement and permitting.

Home modules

Three sizes sharing one wet core and one set of system interfaces. Layouts are concept only; external dimensions and areas require coordinated architectural and marine design.

Concept plan of the 30 square metre module with sleeping area, living and kitchen space, bathroom wet core, entry and storage, and a private deck.
DONSÖ 30 — 30 m² target area. Compact one- or two-person home.
Concept plan of the 50 square metre module with bedroom, flex or work room, living and kitchen space, bathroom wet core, entry and storage, and a private deck.
DONSÖ 50 — 50 m² target area. Permanent home with a flexible second room.
Concept plan of the 80 square metre module with three bedrooms, living and kitchen space, bathroom and laundry, entry and storage, and a private deck.
DONSÖ 80 — 80 m² target area. Family layout requiring a dedicated marine stability solution.

Circulation, safety and service

Plan fragment showing an articulated shore gangway leading to a main access spine with branch decks to individual homes, with continuous edge protection indicated.
Access decks — Step-free routes from shore to every home. Widths and gradients to be verified.
Plan showing a step-free primary escape route along the access spine leading to a shore muster point, a fire and rescue vehicle standing area on land, and a rescue boat berth, with maximum travel distance shown as an item to be set by the fire strategy.
Emergency and service access — Routes, travel distances and rescue provisions must be agreed with the local fire and rescue service for each site.
Schematic section through the shared deck showing a walking surface over an inspectable service duct carrying power, potable water, wastewater, data and fire water, above a compartmented floating foundation, with metered connections to each home module.
Technical infrastructure — Power, potable water, wastewater, data and fire-water strategy routed through an inspectable service duct.

03 / Project economics

Project cost and project value are two different numbers

What it costs to develop the community and what the community is worth are not the same figure. The target cost comes from the current cost model; the gross value is an illustrative scenario used to show why the project can be financed and delivered.

Preliminary target-cost model

Preliminary total development cost

≈ 95–100 MSEK

The preliminary SEK 95–100 million estimate represents the targeted total development cost before developer return — home modules, shared marine infrastructure, engineering, permitting, construction finance and contingency (at the modelled 50-unit level of 46,964 SEK/m² over ≈2,050 m²). It remains subject to site investigations, engineering validation, authority review and procurement. VAT treatment, water-area rights, shore-side connections and exceptional seabed works must be confirmed for the selected site.

Illustrative scenario

Illustrative gross sales value

≈ 125 MSEK

SEK 125 million is an illustrative gross sales-value scenario based on an average price of SEK 2.5 million per home (50 × 2.5 MSEK). It is not an independent valuation, secured revenue or confirmed order value.

What the difference has to cover

The difference between the total development cost and the gross sales-value scenario is not profit. It has to cover, among other things:

  • Sales, marketing and legal structuring
  • Developer return (DONSÖ development fee and delivery margin)
  • The project company's return requirement
  • A risk buffer on the sales-value scenario

On home prices

Final prices per home are not published until the cost model, association financing, monthly fees, VAT treatment and legal structure are verified. Any indicative price will always be shown together with the buyer's deposit, the home's share of the association's debt, the estimated monthly fee and the total economic cost — never a low deposit presented as the whole price.

DONSÖ revenueDevelopment fee, delivery margin and recurring service and monitoring revenue per home. Commercial terms, set per project.
DONSÖ capital, current phaseSEK 1–3 million for the engineering validation phase. Larger community projects are financed separately at project level.

Where DONSÖ ONE sits on the cost curve. At 50 homes the model sits roughly 9% below the SCB national benchmark — an indicative benchmark, not yet a like-for-like comparison; a smaller first project sits above it, because fixed project costs are carried by fewer homes. The current target-cost model indicates potential cost competitiveness against the benchmark from approximately 30 units, subject to engineering validation, supplier quotations, site conditions and regulatory requirements.