Tender for Off-site Construction of Two Pavilions for Upper Alsace Housing

I. Basic Information

Tender Type: Works Tender

Project Name: Design-Build Contract for Off-site Construction of Two Pavilions

Procurement Method: Open Procedure

Contract Type: Global Design-Build Contract

Project Description: The contract takes the form of a global design-build contract, entrusting both the studies (design) and the execution of works (construction) to a consortium of economic operators. The consortium consists of a building contractor, an architect, and one or more design offices. The consortium bears joint and several liability, and the authorized representative must be the building contractor. The objective of the consultation is to determine, from the functional program attached to the consultation documents, the method that best meets the needs and requirements.

CPV Code: 45212600 Construction work for pavilions

II. Works Information

Scale of Works: Two Pavilions

Construction Scope: Off-site Construction

Environmental Construction Requirements: The contract includes detailed environmental performance conditions.

III. Service Information

Service Type: Design and Construction Services

Service Team Requirements: The consortium must include a building contractor (as the authorized representative), an architect, and one or more design offices.

Construction Method: Off-site Construction

Modular Prefabrication: The main structure of the dwellings (e.g., walls, floors, roof modules) will be prefabricated in a factory environment, rather than being cast or built from scratch on the construction site. Prefabricated elements include the structural frame, insulation, openings for doors and windows, and even some internal and external finishes.

On-site Assembly: After the prefabricated components are completed, they are transported to the project site and precisely hoisted and assembled using lifting equipment to form the main building structure.

Precision and Quality Control: Factory production ensures precise component dimensions and stable quality, while reducing the impact of on-site wet work and weather factors on the construction schedule.

Scope of Works:

Design Phase:

Schematic Design: Led by the architect within the consortium, based on the functional program (programme fonctionnel) provided by the Upper Alsace Housing Authority, to complete the architectural schematic design for the two dwellings, including floor plans, facade design, and functional zoning.

Detailed Design: The design offices (structural, HVAC, electrical, etc.) within the consortium complete the construction drawings for each discipline, ensuring reasonable splitting of prefabricated components, reliable connections, and compliance with French building regulations (e.g., RT 2012/RE 2020 environmental regulations).

Prefabrication Design: For the off-site construction method, specialized component splitting design is carried out to optimize component dimensions, weight, transportation plans, and on-site assembly joints.

Construction Phase:

Factory Prefabrication: Production, curing, and quality inspection of all prefabricated components within the factory.

Transportation and Logistics: Develop a detailed transportation plan to deliver prefabricated components to the project site in Absheim on time and safely.

Site Preparation: Complete site leveling, foundation and groundwork to prepare for the hoisting of prefabricated components.

On-site Assembly: Organize on-site hoisting, assembly, and fixing of components to complete the main structure enclosure.

Finishing and Fitting-out: Complete roofing, internal and external wall finishes, door and window installation, connection of MEP pipelines, interior finishing, and external landscaping works.

Equipment Installation: Install kitchen, bathroom, and other supporting facilities, and conduct system commissioning.

Delivery and Handover: Complete all construction works, pass final inspection, and deliver to the Upper Alsace Housing Authority for operation.

Consortium Responsibilities (Design-Build Method):

Single Point of Responsibility: The consortium consisting of the construction company, architect, and design offices acts as the single point of responsibility, bearing overall responsibility for the project's design quality, construction schedule, cost control, and final deliverables.

Collaborative Design: The construction company and the design team collaborate closely from the outset of the project, fully considering the constructability, economy, and construction convenience of the prefabrication process during the design phase to avoid disconnect between design and construction.

Authorized Representative: The construction company, as the consortium's authorized representative, assumes joint and several liability to the client and is responsible for coordinating the work of all members.

Deliverables:

Two detached dwellings that meet modern living standards, are fully functional, and energy-efficient and environmentally friendly.

Complete as-built documentation, including as-built drawings, equipment operation manuals, maintenance guides, etc.

IV. Implementation Conditions

Duration: 12 months

Start Date: June 29, 2026

V. Contract Information

Contract Type: Global Design-Build Contract

Contract Period: 12 months

Payment Method: Fixed price, price adjustable

Advance Payment: Advance payment provided, requires corresponding provision of first-demand guarantee

Retention: Contract stipulates retention, which may be replaced by a first-demand guarantee

Payment Milestones: Payments respect the buyer's overall payment terms

VI. Tender Requirements

Tender Language: French

Tender Submission Method: Electronic submission

Consortium Tender Requirements: Consortium tenders are allowed. The consortium must have a building contractor as the authorized representative and bear joint and several liability.

Tender Validity Period: 6 months

VII. Key Dates

Tender Deadline: April 15, 2026, 12:00

Bid Opening Time: April 15, 2026, 14:00

VIII. Other

Procedure Basis: Based on the Public Procurement Code, exclusion grounds are per the procurement documents.

Environmental Approach: Other methods are used to reduce environmental impact.