6 Common Types of Building Contracts in Construction Projects Explained

What is a Building Contract

A building contract is a legal agreement between the owner of a construction project and the contractor or builder responsible for executing the work. It outlines the scope of the project, materials and labour to be provided, and the terms and conditions under which the work will be carried out.

The contract also details important information such as payment schedules, timelines, and warranty terms. As a legally binding document, a building contract serves to protect the rights and interests of both parties, the project owner and the contractor. In this blog, Gharpedia introduces you to six common types of building contracts used in construction.

Why is a Building Contract Important?

Building contracts ensure that a construction project is completed on time, within budget, and to the satisfaction of all parties involved. For example, if a homeowner hires a contractor to build a new home on their property, the contract helps both parties clearly understand their responsibilities. It defines the scope of work, timelines, payment terms, and expected deliverables. Without this clarity, misunderstandings and disputes can easily arise.

A basic construction contract typically includes payment schedules and terms, ensuring that the contractor is paid on time. Additionally, it also defines roles and responsibilities of any subcontractors involved, which helps maintain project efficiency and workflow transparency.

Moreover, building contracts often include all the legal terms and conditions for resolving disputes, which helps to mitigate potential conflicts or misunderstandings that may arise during the construction process. It also ensures that the project complies with all relevant laws and regulations, protecting all parties involved from potential legal liability.

Advantages and Disadvantages of Building Contract

Some of the advantages of building contracts are:

  1. Clear communication and understanding: Building contracts establish clear terms and conditions for a construction project, ensuring that all parties involved have a clear understanding of their roles, responsibilities, and expectations.
  2. Minimising disputes and misunderstandings: Building contracts provide a legal framework for resolving disputes and misunderstandings that may arise during the construction process, which helps to minimise potential conflicts and delays.
  3. Protection of rights and interests: Building contracts help to protect the rights and interests of all parties involved, including the owner, contractor, and subcontractors.
  4. Ensuring compliance with laws and regulations: Building contracts ensure that the construction project adheres to all relevant laws and regulations, protecting parties from legal liabilities.
  5. Effective cost and timeline management: Building contracts include a budget and schedule for the project, which helps manage costs and ensure timely completion.
  6. Defining the scope of work: Building contracts clearly define the scope of work for the project, helping all parties involved understand what is expected of them. This reduces ambiguity and ensures quality outcomes.
  7. Facilitating efficient coordination: A well-structured contract fosters better communication and coordination between the owner, contractor, and subcontractors, leading to smoother project execution.
  8. Providing a reference point: The contract serves as a reference point for all parties throughout the project and provides evidence in case of disagreements or legal disputes.

Disadvantages of Building Contracts

Building contracts have several potential disadvantages that should be considered when entering a construction project. Some of these include:

  1. Complexity and legal jargon: Building contracts can be complex and filled with legal terminology that may be difficult for non-experts to understand. This can lead to confusion and misunderstandings, ultimately leading to disputes.
  2. Limited flexibility: Building contracts are legally binding agreements that can limit the flexibility of the parties involved. Once the contract is signed, it can be difficult to make changes to the scope of work, timelines, or budget.
  3. Potential for disputes: While building contracts are intended to help mitigate disputes, they can also be a source of disputes, particularly over the interpretation of the contract, failure to fulfil contractual obligations or unforeseen circumstances during construction.
  4. Time-consuming and costly: Drafting, negotiating and finalising a building contract can take considerable time and may incur legal fees. If disagreements arise, the resolution process can further delay the project and increase costs.
  5. Risk of fraud or dishonesty: Building contracts are based on the expectation that all parties will act in good faith. However, there is always a risk of fraud or dishonesty. This can lead to financial losses or legal consequences.
  6. Poor Draft: Building contracts that lack proper clauses or provisions can be detrimental to one or both parties. This often occurs when contracts are prepared without professional guidance.
  7. Power Imbalance: Building contracts can be heavily skewed in favour of the more powerful or experienced party, leading to limited protection for the smaller or less experienced party.

Types of Building Contracts

Every construction work is unique in its nature and requirements. Depending on the type of work involved, there are different forms of construction contracts. Additionally, different construction contract types have evolved to suit varying project complexities, risk-sharing preferences, and cost management strategies. The following are the common construction contracts used for residential and commercial construction work.

1. Lump sum contract

A lump sum contract is a fixed-price contract in which the contractor agrees to complete the work for a specified price. This type of contract is typically used when the scope of work and cost estimates are well-defined, and the risks are manageable. When a builder enters into a lump sum contract, they are taking on more risk, as the owner pays the agreed-upon price, even if there are changes or unforeseen issues during the project, which may substantially increase the cost of the project. In order to compensate for this, some lump sum contracts include allowances to cover additional costs. As a result of the increased risk, builders may charge a higher fee when working under a lump sum contract. Without the added protection, builders may either suffer financial loss or be unable to complete the project as planned.

2. Cost-plus contract

A cost-plus contract is a type of basic construction contract in which the contractor is reimbursed for all actual costs incurred, plus an agreed-upon fee for profit and overhead. This type of contract is typically used when the scope of work needs to be more well-defined or when the risks are high. Cost-plus contracts are often viewed positively by contractors as they don’t have to worry about losing money on materials, and they are guaranteed a profit. Additionally, they encourage quality work.

There are different variations of cost-plus contracts. Some of the most common include:

  • Cost plus fixed fee: This type of cost-plus contract establishes a fixed fee for the contractor’s profit and overhead, regardless of the actual costs incurred.
  • Cost plus percentage of cost: This type of cost-plus contract establishes a percentage of the actual costs incurred as the contractor’s profit and overhead.
  • Cost plus target fee: This type of cost-plus contract establishes a target fee for the contractor’s profit and overhead, with the potential for an adjustment based on the actual costs incurred.
  • Cost plus award fee: This type of cost-plus contract establishes a fee that is awarded to the contractor based on their performance rather than a fixed or percentage fee.
  • Cost plus with guaranteed maximum price: This type of cost-plus contract establishes a maximum price that the owner will pay for the project, even if the actual costs incurred exceed that amount.

3. Unit price contract

A unit price contract is a type of contract in which the price for each unit of work is pre-determined. This type of contract is typically used for projects with a variable scope of work, such as infrastructure projects. These are well-suited for projects that can be divided into easily measurable units. They are particularly useful when the project’s cost largely depends on the units’ price and repetitive tasks are involved. Contractors often prefer this type of contract for the ease of invoicing and the shared risk among all parties involved.

4. Design-build contract

A design-build contract is a type of contract in which the contractor is responsible for the project’s design as well as construction. This type of contract is typically used when the owner wants a single point of responsibility for the project. Design-build contracts are popular among organisations that want to complete projects quickly, collaborate effectively, and streamline processes. This type of contract is beneficial as it reduces the potential for disputes between designers and builders and allows designers to have more input in the construction drawing process, reducing the need for changes.

5. Construction management contract

A construction management contract is a type of contract in which the contractor is responsible for managing the construction process and also performs some or all of the work. This type of contract is typically used when the owner wants to retain control of the project but also wants the contractor to perform some of the work.

6. Turnkey contract

A turnkey contract is a type of contract in which the contractor is responsible for the design, construction, and commissioning of a project. The contractor is responsible for the entire process, from design to the final inspection and acceptance by the owner. The owner is not involved in the project’s day-to-day operations and only needs to provide the land and any necessary permits.

Turnkey contracts are beneficial because they provide a single point of responsibility for the project, which can simplify the construction process and reduce the risk of disputes. Additionally, the owner can be assured that the project will be completed to their satisfaction, on time, and within budget. However, turnkey contracts can also be more expensive, as the contractor is taking on more risk, and it can be difficult for the owner to change the design or scope of the project once the contract is signed.

It’s worth noting that the type of contract chosen will depend on the specific needs of the project and the parties involved. Some contracts may be more suitable for certain types of projects, while others may be more suitable for different types of risks.

Conclusion

Being aware of the various types of building contracts allows you to determine which one is appropriate for you and your project. It is crucial to take into account other factors such as the labour required, technology, and equipment to be used for the job. Additionally, considering value engineering can help you evaluate the cost and material options, ensuring that you are getting the best value for your project. In conclusion, building contracts are crucial for the success of a construction project and should be carefully reviewed and negotiated by all parties involved to ensure that they meet the needs of the project and protect the rights and interests of all parties.

Also Read:

Tips for Choosing the Right Building Contractor: 7 Questions to Ask

Labour vs Material Contract: Choose Wisely while Building your House

Types of Building Contracts FAQs

1. What is a building contract?

A building contract is a written agreement between the contractor and the owner which mentions all the terms and conditions of the construction project. It also includes the work to be done, costs, timelines, responsibilities, and dispute resolution modes.

2. What are the types of contracts in construction?

The following are the types of contracts in construction:

  1. Lump Sum Contract
  2. Cost Plus Contract
  3. Unit Price Contract
  4. Design-Build Contract
  5. Construction Management Contract
  6. Turnkey Contract

3. What are the five elements of a construction contract?

The five main elements of a construction contract are: scope of work, cost of the project, project timeline, order of work, and dispute resolution.

4. What is the difference between a lump sum and a cost-plus contract?

A lump sum contract has a fixed cost for the entire project, whereas in a cost-plus contract, the owner pays for the actual construction cost along with a fee.

5. Which type of contract is best for homeowners?

Lump sum contracts are common and suitable for a simple home construction project.

6. Can a contract be changed once it is signed?

Yes, it can be changed. However, changes should be agreed upon by both parties (contractor and owner).

7. What is the difference between a design-build contract and a turnkey contract?

Both design-build contracts and turnkey contracts involve only the contractor handling both the design and construction, but there’s a key difference in ownership involvement and final delivery.

In a design-build contract, the contractor designs and builds the project, but the owner stays involved throughout the process.

In a turnkey contract, the contractor takes full responsibility for the entire project, from design to completion,  and hands over a finished, ready-to-use building to the owner.

Author Bio

Nafisa Nazneen Choudhury – Nafisa Nazneen Choudhury is a Civil Engineer (completed B.E. from Assam Engineering College) and is currently pursuing M.Tech in Structural Engineering at National Institute of Technology, Silchar. She is a Technical Content Writer, having over 3 years of experience and has wrote many articles related to Civil Engineering. She is also a Book Author (Authored – “Dream Tales of NNC: Revenge By Murder”) and her book can be found on Amazon. She is also a Guest Author at Gharpedia. Moreover, she is a certified member at Institution of Civil Engineers (ICE) and National Society of Professional Engineers (NSPE). She writes her blogs at her website – nnc2017.wordpress.com. She can be reached on LinkedIn.

Do you have query?

Let our experts solve it for you while you rest