Stop and ask
You haven’t touched the extra yet. That’s the point.
Hi Alex — I found rot under the sill. I haven’t touched it. Extra would be about $120. Say yes or no before I go further.
Extra work found / scope change
You found more than they booked. Stop. Tell them the extra and the number. Don’t do it until they say yes.
Name what you found and the extra amount before you continue.
Not in what we booked
Give them a stop option, not only a bigger bill.
The job we booked doesn’t cover this. There’s a cracked pipe behind the panel. I can stop here, or I can fix it today for $90. Your call.
Finish as-is or add work
Cosmetic extra. Easy to skip if they don’t want it.
Before I keep going: the closet walls need a skim coat if you want them to match. That’s extra time and materials. Want me to do it, or leave it as-is?