Prefabricated House Extension Contract

The prefabricated house extension contract should include the following core clauses, compiled based on two sample contracts:

I. Contract Subject Information The names, domiciles, and information of the legal representatives or responsible persons of both Party A and Party B should be clearly specified. If an individual is involved, their name, ID number, and contact information should be provided; if a company is involved, its unified social credit code should be supplemented. This clause is used to confirm the qualifications of the contracting parties and avoid disputes arising from unclear subjects.

II. Scope and Requirements of the Project

1. Extension Content: The parts to be extended (such as walls, floors, roofs), structural form (such as frame structure), total height, and increase in building area should be described in detail. For example, Contract 1 specifies that the total height shall not exceed three floors and the total building area shall increase by 180 square meters.
2. Material Standards: Prefabricated components should comply with national standards such as the Technical Specification for Assembled Concrete Structures, specifying the concrete strength grade (such as C40), steel bar specifications, and quality inspection requirements. Contract 2 requires Party B to provide quality inspection reports and certificates of conformity.
3. Design Basis: The design drawings and technical requirements provided by Party A shall prevail, with key parameters such as the number of floors, structural form, and wall materials clearly indicated.

III. Contract Price and Payment

1. Pricing Method: Either a lump-sum price (as in Contract 2) or actual settlement (as in Contract 1) can be chosen. If actual settlement is adopted, a unit price adjustment mechanism should be agreed upon when the increase or decrease in project quantity exceeds 5% of the total contract price.
2. Payment Milestones: Payments are usually made in stages, including an advance payment (30%-50% after contract signing), progress payments (40% upon completion of the main structure), completion acceptance payment (25%), and a quality guarantee deposit (10%). The payment conditions and proportions for each stage should be clearly specified.
3. Tax and Fee Responsibility: Contract 1 specifies that the price includes a 13% value-added tax, while Contract 2 requires the lump-sum price to include all taxes and fees, which should be determined through negotiation based on actual circumstances.

IV. Project Duration and Place of Performance

1. Total Project Duration: The number of calendar days should be clearly specified (such as 480 days in Contract 1), with the production of prefabricated components, on-site installation, and acceptance preparation periods broken down.
2. Delay Handling: Rules for postponement during legal holidays and procedures for reporting special circumstances (such as notifying Party A 15 days in advance) should be agreed upon.
3. Place of Performance: The project address and the area for material arrival and stacking should be clearly specified. Contract 1 stipulates that the risk transfers to Party A after the components arrive on site.

V. Acceptance and Quality Assurance

1. Acceptance Standards: Acceptance should be carried out in accordance with relevant national and local regulations, with staged acceptance (such as component lifting, main structure completion, and project completion acceptance) requiring the signatures of representatives from both parties.
2. Quality Objections: The receiving party should raise written objections within 3 days after acceptance; otherwise, it shall be deemed qualified.
3. Warranty Period: Usually 1-2 years, with the final payment made after the warranty period expires.

VI. Other Clauses Additional clauses should be added regarding safety production responsibilities, civilized construction requirements, liability for breach of contract (such as the proportion of late payment penalties), and dispute resolution methods (litigation or arbitration). The contract shall take effect upon the signatures and seals of both parties. It is recommended to prepare two copies, with each party holding one, and to have it reviewed by a legal professional before signing.