How to read a construction schedule, and what to ask when a date moves
A schedule is a list of promises that depend on each other. Reading one means finding which promise everything else waits on.
The bars are not the schedule
A schedule is usually drawn as bars on a calendar. The bars matter less than the lines between them: drywall cannot start until insulation is inspected, insulation cannot start until the rough plumbing and electrical are signed off, and so on back to the permit. Ask to see those links. A chart with no links is a wish list.
Find the critical path
The critical path is the longest chain of tasks that depend on one another. A day lost on it is a day added to the whole job. Other tasks have float: they can slip a little without moving the end. When your builder reports a delay, the first question is whether it is on the critical path.
Framing, then rough plumbing and electrical, then insulation and drywall, then cabinets and finishes: each waits on the one before. Windows are ordered at the start and are not needed until drywall.
On the critical pathHas floatFloat
Long-lead items set the pace
Windows, exterior doors, custom cabinets, some appliances and special-order tile can take longer to arrive than the house takes to frame. They are ordered early, against approved drawings, and each one has a decision date behind it. A choice made two weeks late becomes a month lost on site, because the trade that was waiting has gone to another job.
Inspections are gates
The building inspector signs off stages in order, and work cannot be covered until its stage is signed. In broad terms: foundation before the pour, framing and the rough trades before insulation, insulation before drywall, and a final at the end. A failed inspection is not a disaster, but a re-inspection has to be booked, and the trades behind it wait.
On this coast, review comes first
Before any of that, the project passes design review and plan check, and the path differs by town. In Montecito it is the County and the Montecito Board of Architectural Review. In Hope Ranch the homes association reviews alongside the County. In Carpinteria and most of Summerland a Coastal Development Permit is part of it. Entitlement here takes six weeks to nine months. Move a board date and watch the schedule.
Weather has a calendar too
In the County, grading between November 1 and April 15 needs erosion controls in place first. Concrete and excavation go slower on wet ground. A schedule that starts site work in January should show weather days.
Five questions when a date moves
- Is it on the critical path?
- What moves behind it, and by how much?
- Does it change the cost?
- What decision do you need from me, and by when?
- What is the new finish date, in writing?
We answer those in the written update every Friday. A specimen is here.
Related: how we manage a project, the seven phases, a house built stage by stage, and an owner’s representative to read the schedule for you.
Built by Matt Newman. Licensed since 2001. Salt Lake City, Los Angeles, twenty years on this coast, and on every AMN site himself. One name on the contract. His story
Send us the address. We'll tell you the truth about it.
Email it to purchasing@amnbuild.com. Matt reads it himself and writes back within two business days.
- Same dayMatt confirms he has it, and flags anything obvious that is missing.
- Within two business daysA written reading of your parcel: jurisdiction, review bodies, an order of cost and the permit path.
- Then nothing, unless you askNo follow-up sequence, no call from anyone else. The reading is yours to keep.
CSLB 802739 · Class B General Building · Licensed and insured · Two-year workmanship warranty, in writing