Construction notice of delay letter generator

A notice of delay is the letter that keeps a late job from becoming your problem. It tells the owner or general, inside the time your contract allows, that your work has been held up, why, and that you want the days and the money back. Fill in the clause and the date the delay began, and the tool works out when the notice is due and drafts the letter.

Pre-filled with a realistic RFI delay. Change any field; the letter rewrites as you type.

Who it is from and to

Your company

Your address

Recipient (the party your contract names)

Recipient address / attention

Project

How you are sending it

Contract and notice clock

Contract reference

Notice clause

Copy the article number from your contract.

Notice period in your contract

days

Counted in

Date the delay began (or you first knew)

Date of this letter

The delay

Cause

Status

Estimated delay so far

calendar days

What happened, specifically (RFI number, drawing, area, who directed what)

What you are doing to limit it

Request a time extension

Reserve the right to recover delay costs

Signature

Signer name

Signer title

Notice clock

Delay beganOctober 6, 2026
Your contract's notice period+7 calendar days
Notice due byOctober 13, 2026
This letter dated October 9, 20264 days to spare

Notice of delay

NOD · 2026-10-09

DateOctober 9, 2026

Sent byEmail and certified mail, return receipt requested

ToVantage Construction Group, Attn: Project Manager, 18 Mercer Street

FromIronline Mechanical LLC, 220 Foundry Row, Suite 4

ProjectKestrel Avenue mixed-use — mechanical package

ContractSubcontract No. VCG-2611 dated March 2, 2026

ReNotice of delay under Article 8.3 (Delays and Extensions of Time)

This letter is written notice under Article 8.3 (Delays and Extensions of Time) of Subcontract No. VCG-2611 dated March 2, 2026 that our work on Kestrel Avenue mixed-use — mechanical package has been delayed. The delay began on October 6, 2026 and is continuing as of the date of this letter.

The delay is caused by information we needed to proceed and did not receive in time: an unanswered request for information, or design information that arrived late or incomplete. Specifically: RFI No. 031 (level 2 duct main conflicts with the beam at grid C/4) was submitted on October 6, 2026 and has not been answered. Duct mains on level 2 cannot be hung until the routing is resolved.

Based on what we know today, we estimate the delay to our work at 10 calendar days. Because the cause has not ended, this estimate will change, and we will confirm the final figure in writing when it does.

We request an extension of the contract time equal to the delay, and an adjustment of the schedule to match.

This delay is increasing our cost of performance, including extended field supervision and general conditions, equipment standby, and remobilization. We reserve our right to recover these costs and will submit a priced request once the full effect of the delay is known. Nothing in this letter waives any right we have under the contract or at law.

To limit the delay, we are taking the following steps: We have moved the level 2 crew to level 3 branch ductwork and are holding fabrication of the affected fittings so no material is built to the wrong routing.

Please confirm receipt of this notice and give us the direction or information needed to resume full production. We are available to meet at your convenience.

Sincerely,

Signature ____________________

Dana Okafor, Project Manager
Ironline Mechanical LLC

Two letters, not one

Send the first letter while the delay is still running. Send a second when it ends, with the final day count and the priced request.

Why the notice clause decides the claim

Almost every construction contract has a clause that says, in some form, that you must give written notice of a delay within a set number of days or lose the right to more time and money for it. The work can be late through no fault of yours and the claim can still die, because the paper did not go out in time. Owners and generals know this. When a job runs long, the first thing anyone checks is who sent notice and when.

Federal contracts show how hard the rule is. Under FAR 52.249-10(b), a contractor is protected from default and delay damages for an excusable delay only if it notifies the Contracting Officer in writing of the causes within 10 days from the beginning of the delay. Under FAR 52.242-14(c), a claim for an unreasonable suspension or delay cannot recover costs incurred more than 20 days before the written notice. Every day you wait is a day of cost you cannot bill. Private contracts set their own periods, so the number that binds you is the one in your contract's notice clause. Put it in the tool and it gives you the date.

A phone call, a line in the meeting minutes, or a comment on the daily report is not notice unless your contract says it is. Some courts excuse a late letter when the owner plainly knew. Do not build your claim on that.

What to put in writing

Notice of delay letter, contents
Element	What to write	Why
Clause	The article number and contract it is given under	Shows the notice was given the way the contract asks.
Start date	The day the delay began, or the day you first knew	The notice clock runs from here. Count from the earlier date.
Cause	RFI number, drawing, grid line, who directed what	“Delays on site” proves nothing. A named cause can be checked.
Status	Ongoing, or ended on a stated date	An ongoing delay gets a second letter when it ends.
Impact	Estimated days, labelled as an estimate	Puts a number on the table without locking you to it.
Time	A request to extend the contract time	Without it you can be held to the old finish date.
Cost	A reservation of delay costs, priced later	Keeps the money claim alive while the effect is unknown.
Mitigation	What you moved, held or resequenced	Answers the first defence: that you could have avoided it.

Send it to the person and address your contract's notice provision names, by the method it names. If it says certified mail, an email alone may not count. Keep the receipt and the sent email together with the letter.

How a delay notice gets you paid

A delay costs money even when nobody is working. Your superintendent, trailer, rented lift and insurance all run by the day, and the job now needs more days. Those are your extended general conditions. They come back to you only through a change order, and a change order for delay is only as strong as the notice behind it. The notice is the first page of the invoice you send later.

Worked example: an RFI delay from notice to change order
Date	Clock	What happens
Oct 6	Day 0	RFI 031 submitted. Level 2 duct mains stop.
Oct 9	Day 3	Notice of delay sent. Ongoing, about 10 days estimated, costs reserved.
Oct 13	Day 7	Contract notice period ends. Notice already on file.
Oct 19	Day 13	RFI answered. Crew back on level 2. Delay ends.
Oct 22	Day 16	Second letter: final days, priced change order request.

Price the delay as its own change order request with the change order form generator, and attach both notice letters. Once it is approved, it becomes a line in your schedule of values and gets billed like any other work. Whether the general can hold that money until the owner pays is a question for your payment terms, not your delay clause.

If the delay turns into a payment fight, follow the escalation ladder rather than stopping work on your own. When the money is approved and still not paid, the notice of intent to lien is the next letter. On federal and many public jobs, work out the interest owed on a late payment with the prompt payment interest calculator.

A delay notice does not stop any lien clock

Your lien and bond deadlines keep running while you argue about the schedule. A delay letter protects your time and cost claim under the contract. It does nothing for your lien rights. Check those separately with the deadline calculator.

Sources

FAR 52.249-10(b)
On a fixed-price federal construction contract, the right to proceed is not terminated and no delay damages are charged for an unforeseeable delay beyond the contractor's control, but only if the contractor notifies the Contracting Officer in writing of the causes within 10 days from the beginning of the delay (unless extended).
Read 2026-10-18
FAR 52.242-14(c)
A Suspension of Work claim is not allowed for costs incurred more than 20 days before the contractor notified the Contracting Officer in writing of the act or failure to act (this does not apply to a written suspension order), and the claim, in a stated amount, must be asserted in writing no later than final payment.
Read 2026-10-18
FAR 52.243-4(b), (d), (e)
For a change ordered other than by written change order, the contractor must give written notice stating the date, circumstances and source of the order; no adjustment covers costs incurred more than 20 days before that notice (except defective specifications), and the right to an adjustment must be asserted within 30 days unless extended.
Read 2026-10-18
FAR 52.236-2(a), (c)
The contractor must promptly, and before the conditions are disturbed, give written notice of differing site conditions; no equitable adjustment is allowed unless that written notice was given.
Read 2026-10-18