Cost Plus vs. Fixed Price Contracts

Cost plus and fixed price are two common types of contracts used in residential construction. Let's discuss each of them:

  • Cost Plus Contract: In a cost plus contract, the homeowner agrees to pay the contractor for the actual cost of labor, materials, and other expenses, plus an additional fee or percentage for profit and overhead. This fee is typically a fixed percentage of the total cost and is agreed upon in advance.

  • Pros: 

  • a) Flexibility: Cost plus contracts offer flexibility as they allow for changes and modifications during the construction process. This can be beneficial if the scope of work is uncertain or if the homeowner wants to make design changes. 

  • b) Transparency: With a cost plus contract, the homeowner has visibility into the actual costs incurred, as the contractor provides detailed invoices and receipts. This transparency can help build trust between the parties.

  • Cons: 

  • a) Uncertain final cost: Since the final cost is not predetermined, cost plus contracts carry the risk of exceeding the initial budget. Unforeseen expenses or changes can increase the overall cost, potentially leading to budget overruns. 

  • b) Limited incentive for cost control: The contractor may have less incentive to control costs since their profit is tied to a percentage of the total cost. This can result in higher overall expenses.

  • Fixed Price Contract: In a fixed price contract, the contractor agrees to complete the project for a predetermined fixed price. This price is typically determined based on the agreed-upon scope of work, specifications, and plans.

  • Pros: 

  • a) Budget certainty: With a fixed price contract, the homeowner knows the exact cost upfront and can plan their finances accordingly. This provides budget certainty and helps avoid cost overruns. 

  • b) Contractor accountability: Since the contractor is responsible for managing costs within the fixed price, they have a strong incentive to control expenses and complete the project efficiently.

  • Cons: 

  • a) Limited flexibility: Fixed price contracts offer less flexibility for changes or modifications during construction. Any changes to the scope of work may result in additional costs or require a change order. 

  • b) Potential disputes: If unforeseen issues or changes arise, conflicts may arise between the homeowner and the contractor regarding responsibility for additional costs.

Ultimately, the choice between a cost plus contract and a fixed price contract depends on factors such as the homeowner's preferences, project complexity, level of certainty in the scope of work, and willingness to accept potential cost fluctuations. It's advisable to carefully evaluate the specific circumstances and consult with a construction professional or attorney before deciding on the most suitable contract type for a residential construction project.

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