Negotiating with contractors: how the estimate, the budget and the specification shape the price
Negotiating with contractors starts long before the conversation about price: in the estimate, the budget and the specification the contractors receive. When the documents are clear, the contractors price a defined scope and the negotiation is about price. When the specification is full of sweeping clauses, each contractor prices a different risk, and the offers can no longer be compared. On a large project a negotiation like this, with the main contractor, the subcontractors and the suppliers, can take days and sometimes weeks, and it changes the estimate and the budget in every round.
Negotiating with contractors starts with the estimate and the budget
The estimate is the reference point: what the work should cost by the quantities, the assumptions and the chosen pricing basis. The budget is the developer's decision on how much to spend. Negotiating with contractors without both turns into haggling over a number at the bottom of an offer, without knowing where it came from.
The practical way is to give every contractor the same bill of quantities, with the same quantities and descriptions, and to compare item against item. That shows where a contractor is really expensive and where it simply understood the work differently. On building such an estimate, see construction cost estimate.
Why the contractor wants the project
To do well in a negotiation you need to know the strengths and the weaknesses of the other side, and above all why it wants to work with you: for the price, for the quality or for the experience. Usually it is both. In luxury projects experience almost always matters more than price, because a mistake in an expensive finish costs more than the gap between two offers.
Some contractors want to step into a project larger than anything they have built so far, to add it to their track record. Such a contractor may accept a lower profit, and that does not always show in the price: sometimes it simply wants the job more and will invest more in it. In a negotiation you see this as appetite: how hungry the contractor is for work, how full its order book already is, and how much this project matters to it. There is also the opposite question: how important is it to you that this particular contractor comes, or do you prefer a contractor with proven experience and are ready to pay more for it? Every answer changes the pricing, the estimate and the budget.
Preparation: the market, three quotations and the project's risks
Before sitting down with a contractor, know the market and get at least three quotations for the same work, on the same bill of quantities. Know the project in depth: its strengths, its weaknesses, its risks, and where a contractor might make a mistake because of a detail it missed. Whoever arrives with the requirements, the strengths and the weaknesses written down in advance leads the conversation instead of being dragged along by it.
Feel the pulse of the labour market too: are there workers, and are foreign workers coming in. In Israel, according to a State Comptroller report on the employment of non-Israeli workers (April 2026, in Hebrew), foreign workers enter only within quotas set by the government, and in June 2025 the construction industry still lacked workers. A contractor without enough hands will put that into the price, or take the job and struggle to keep to the schedule. Outside Israel the question is the same: who is available to build, and at what cost. On crews, equipment and durations, see construction resources.
Specification clauses that cannot be priced
Sometimes the biggest problem in a negotiation comes from the specification itself. Every word and every line in the specification can move the price, and each of them can turn work into a variation. Some specifications include general sentences that shift responsibility to the contractor from every possible angle: the contractor is responsible for all work needed to complete the project, even outside the plot boundary, even in landscaping areas that have not been designed yet, and even in works it cannot access. A contractor cannot price work that has no design yet.
Facing such a clause, a contractor has three options: add a risk premium that raises the whole offer, exclude the clause, or ignore it and submit variations later. Each of them costs the developer money, only at a different time. That is why the specification is read before pricing, as explained in technical specification, and why sweeping clauses should be corrected at the tender stage.
The supervisor and the project manager: the same requirement, a different price
Contractors also price the people they will work with. One site supervisor reaches understandings quickly and lets the work move on; another looks for reasons to stop it. Some project managers write requirements that can be built and measured; others write requirements that cannot be priced. An experienced contractor notices this early and puts it into the price: more time on site, more overheads and less flexibility.
On the other hand, a clear specification and consistent supervision lower the price of uncertainty. This is not about generosity but about risk: the clearer the risk, the easier it is to price, and the closer the offers come to each other.
What moves the price during the negotiation
During the negotiation the main contractor goes back to its subcontractors and suppliers, receives updated quotations and checks alternatives. Every clarification about a quantity, a material or the phasing can change the price. Time changes it too: a site that runs longer adds overheads, as explained in site overheads. On the data a contractor's procurement team holds and why it sets the price, see construction procurement.
An item missing from the bill of quantities comes back later as a variation, at one contractor's price and without competition. So a good negotiation also checks what is not written: which works were not measured, what was excluded and what the assumptions are. On variations and how a bill of quantities reduces them, see construction variations.
A specification that cannot be priced costs twice. Once as a risk premium in the offer, and a second time as a variation or a dispute in the middle of construction.
Who should be at the table
Negotiating with contractors needs someone who knows the prices that can be achieved in the market, work durations and resources: a works manager and estimator with field experience in project management, procurement and supervision, who knows what each job requires and how subcontractors and suppliers price it. Yaakov Avital has worked as an estimator and quantity surveyor for a main contractor, in a tender department and on building extensions in operating hospitals, and he is a certified works manager. On the differences between contractors and why there is no single price for all of them, see construction estimator.
A quantity surveyor may be an engineer or a registered building technician, like Yaakov Avital. In my work I measure the quantities the way a contractor would, and pricing and estimates are an extra service: verbal feedback on prices together with you, with no commitment. More on the page of a quantity surveyor in Israel.
Frequently asked questions
How long does negotiating with contractors take?
It depends on the scope, the number of subcontractors and the quality of the documents. When the bill of quantities and the specification are clear, most of the time goes on price. When they are not, most of it goes on clarifications.
What should be prepared before a negotiation?
One bill of quantities for all the contractors, a specification without sweeping clauses, an estimate with written assumptions, a budget, and at least three quotations. Then every round focuses on real gaps.
Why would a contractor accept a lower profit?
When the project is larger than anything it has built, it adds experience and a line to its track record. So it sometimes gives up part of the profit, or invests more in the work. Check that it has the crews and the capacity for a project of that size.
What do you do with a sweeping responsibility clause?
Ask for it to be specified: what the work is, where the limits are and what has already been designed. Whatever has not been designed moves to a separate item, to be measured and priced once it has a design.
Can quantities change during the negotiation?
Yes, when an error or a design change comes up. Update the bill of quantities for every contractor and keep the previous version, otherwise the comparison breaks.
Have a project? Tell me briefly what the project is and what already exists. When the project is a good fit, I usually reply with focused questions and a written quote.
Contact me for a quote* Created with AI for marketing, for illustration only. Not reviewed by Yaakov Avital and not professional advice. Every project must be checked on its own by a professional quantity surveyor and an engineer.