What Is Contract Administration – and Do You Need It for Your Extension?
Your drawings are ready, you have found a builder you trust and the start date is coming into view. There is still one useful question to ask: who will keep the payments, changes and completion process clear once work begins?
For some homeowners, an agreed building contract and their own careful organisation are enough. Others would welcome a professional point of contact throughout construction. That is where Contract Administration can help.
At Downland Studio, Contract Administration is an optional, separate service for residential projects in Worthing and West Sussex. It sits alongside our design, planning and technical drawing services, rather than being a requirement of a drawing package.
What does Contract Administration actually mean?
A Contract Administrator carries out the duties assigned to them in the agreed building contract. Depending on the contract and appointment, that can involve issuing instructions, assessing payment applications, reviewing variations, dealing with contractual progress and certifying completion.
For you, the practical benefit is a clearer record of what has been agreed and what happens next. When the builder asks for payment or a change is proposed, there is a defined process rather than a decision made from memory.
The Contract Administrator advises the homeowner as their client, while exercising the contract’s assessment and certification duties fairly. The precise powers and procedures come from the chosen contract; they are not the same on every project.
What is a building contract?
A building contract records the agreement between you and your contractor. It identifies the work to be done, the documents describing it, the price or pricing basis, payment arrangements and procedures for matters such as changes, time and completion.
A quotation is useful, but look closely at what supports it. Which drawings and specifications does it cover? What is excluded? How are changes priced? When do payments become due? What happens if something takes longer than expected?
A trusted builder benefits from clear answers too. Written terms help both parties start from the same understanding and reduce the scope for an innocent misunderstanding becoming an expensive disagreement.
What does a JCT contract do?
The Joint Contracts Tribunal publishes standard building contracts for different project types and procurement arrangements. An appropriate JCT contract provides an established framework for the agreement, with project details completed and the relevant documents identified.
Choosing the suitable form matters. A homeowner project does not automatically need the most complicated contract, and one contract should not be used simply because it was used on a previous job. The scope, design responsibilities and way the work will be delivered need to be considered.
Some JCT forms provide for a Contract Administrator; the duties and certificate arrangements depend on the selected form. A contract helps organise the relationship. It does not guarantee a trouble-free build or replace choosing a capable contractor.
You can read about the available forms and contract selection in JCT’s own guidance.
What about NEC, RIBA and other building contracts?
JCT is one option, rather than the only route. RIBA’s Domestic Building Contract is designed for work with homeowner clients. FMB domestic contracts are another option where the builder is an FMB member and the form suits the work.
NEC contracts can also be considered where appropriate. The NEC4 Engineering and Construction Short Contract is intended for straightforward, lower-risk work. NEC uses its own procedures for early warnings and changes, known as compensation events; it should not simply be administered as though it were a JCT contract.
The title, powers and responsibilities of the person administering the agreement vary by contract. For example, the NEC Engineering and Construction Contract uses Project Manager and Supervisor roles rather than the same Contract Administrator role used in some JCT forms. Any professional appointment must match the chosen form and its requirements. The sensible choice depends on the work, design responsibilities, risks and level of professional involvement—not just the name on the cover.
Before construction starts: make the starting point clear
The most useful time to discuss Contract Administration is before signing the building contract and starting work. That gives the homeowner, contractor and administrator time to agree the documents and understand the procedures.
Preparation can include coordinating the contract drawings and specifications, clarifying the scope, recording the agreed price and programme, completing an appropriate contract and arranging for the parties to sign it.
The architectural information needs to be ready for its purpose. Building Regulations and technical drawings develop how the design will be constructed; planning drawings alone generally leave too much unresolved for detailed construction pricing.
The relevant approvals, conditions, specialist designs and inspection arrangements should also be understood. Signing a building contract does not remove statutory requirements or the need to coordinate separately appointed consultants.
How are payments assessed?
Under an appropriate administered contract, the contractor submits applications for payment and the Contract Administrator assesses them and issues the relevant payment certificates in accordance with that contract.
This gives the homeowner a documented assessment of the amount due. The assessment considers the contract requirements and the work and other items properly due for payment; it is not simply a check that an invoice adds up.
The applicable dates, notices, retention arrangements and payment procedures must be followed. They vary between contracts, so there is no single payment timetable that should be assumed for every extension.
Certification is also distinct from a guarantee of workmanship. Scheduled attendance and payment assessment cannot reveal every concealed detail or replace the contractor’s responsibility to carry out the work correctly.
Variations: “while you’re here” needs a written record
A different rooflight. Another socket. A wall moved a little further. Changes during construction are common, but their effect on price, programme, design and approvals is not always obvious at the time.
Verbal agreements can leave both parties with different recollections. One person may hear an instruction; another may think it was only a suggestion. A change that appears small may also affect work already ordered or completed.
Contract Administration helps record variations and administer their assessment through the agreed contract. Where required, formal Contract Administrator’s Instructions provide a clear record of what has been instructed. The instruction and valuation processes follow the contract rather than an informal assumption that every change has already been priced.
A useful habit for a homeowner is to raise proposed changes through the agreed communication route before the affected work proceeds. Ask what they mean for cost, time, drawings and any necessary approvals. For urgent site issues, the contract and appointment should make the escalation route clear.
Meetings, site visits and progress
Scheduled progress meetings provide a regular opportunity to discuss the work, outstanding information, decisions and the next stages. Written records help everyone follow what has been agreed and what still needs attention.
Site attendance is arranged around the appointment and project. The administrator can review contractual progress and address matters within their role, but is not on site continuously directing every trade.
If delays arise, the contract may require notices, information and assessment of time implications. Contract Administration manages the applicable process; it does not promise that the original completion date can never change.
What is Practical Completion?
Practical Completion is a contractual milestone, assessed and certified in accordance with the building contract. It records that the works have reached the stage required by that contract for this milestone.
It is not a casual description of the house looking nearly finished. Depending on the form of contract, certification can affect possession, retention and the start of the defects or rectification period. Outstanding matters and the relevant handover information need to be considered properly.
Building Control completion certification is a separate statutory process. A Practical Completion certificate should not be treated as a substitute for Building Control’s required inspections and information, or other specialist certificates.
What happens during the rectification period?
After Practical Completion, the contract may provide a defined defects or rectification period. Relevant defects are recorded and the contractor’s making-good obligations are administered under the contract.
This is different from having an open-ended promise that someone will deal with every future maintenance issue. The applicable duties, timings and procedures come from the agreement.
Following the appropriate reviews and contractual steps, the final account and final certificate process can be dealt with where the chosen form provides for them. This helps close out the financial and completion records rather than leaving the last stage unresolved.
Contract Administration or Project Support?
Project Support is Downland Studio’s flexible architectural and technical assistance: a specific drawing query, quotation review, design change or agreed site visit. It is useful when you need focused help with a particular issue.
Contract Administration is a formal appointment to administer an actual building contract through the agreed construction and completion stages. It provides the contractual framework for payments, variations, instructions and certification.
Neither should be confused with full Project Management or continuous site supervision. The contractor remains responsible for construction methods, sequencing, site safety and workmanship. Structural engineers and other specialists remain responsible for their own professional work.
Who is likely to benefit?
Contract Administration may be particularly useful if you want professional involvement beyond the drawings, find the payment and change procedures unfamiliar, or expect a build with several decisions and stages to coordinate contractually.
The value is not confined to a difficult relationship with a builder. A good working relationship often benefits from having a clear process before any uncertainty arises.
For a smaller, straightforward job, a proportionate written agreement and focused Project Support may be the better fit. We discuss the project, the information available and the involvement you want before recommending an appointment.
A clear fee before you appoint us
Downland Studio’s Contract Administration guide fees start from £1,000 for construction values up to £30,000, with published bands for larger projects and fees from 2.5% above £200,000. The construction value used for the bands excludes VAT.
The bands assume a typical domestic construction programme and normal level of administration. Your proposal confirms the scope, attendance arrangements and final fee before appointment. A substantially extended programme, unusually frequent attendance or materially greater complexity may require an additional fee agreed before the extra work.
View the complete Contract Administration scope and fee bands →
Contract Administration is optional, separately appointed and excluded from our design fee calculator totals. Our Architectural Fees & Service Guide explains the design and technical services alongside it.
Discuss the construction stage before it begins
Whether Downland Studio has prepared your drawings or you are approaching us with a design prepared elsewhere, tell us about your contractor, project stage and intended programme. We can review what is in place and discuss the appropriate support.
Measured Survey → Design & Planning → Building Regulations → Construction → Completion: the route should feel understandable, with a clear appointment at each stage.
Discuss your project with Downland Studio →
Further reading: JCT contract selection guidance and JCT’s available contract and administration products. This article explains the service generally; your chosen building contract and agreed appointment determine the procedures for your project.