Field notes · Read the plan, then price it
Practical guides for residential contractors: read the plan, measure the takeoff, price the material list and prepare the load calc or permit drawing behind your next bid.
11 min Electrical estimating software turns plans into device counts, route lengths and a written scope. Here is how to run a takeoff you can defend, a worked route allowance example, and the one test that separates useful tools from pretty totals.
11 min A single line diagram shows how power moves from the utility to your panels and big loads. Learn what one line means, how it differs from a three-line and a panel schedule, and how to draw one that survives review.
12 min What goes into a Manual J load calculation, how to get one done for a permit, who can run it, how to read the report and the mistakes that send it back.
11 min A Manual J calculator turns areas, windows and design temperatures into heating and cooling loads. See the inputs, a worked two room report check, how block estimates differ from full reports, and why stacking safety factors backfires.
11 min HVAC estimating software should trace every duct run, fitting and condenser line back to a sheet, an airflow and a dated load. Walk a worked six branch takeoff, see why per run rounding beats a blanket allowance, and get five checks for any tool.
10 min Start with the address and scope, then assemble a consistent residential permit packet. Includes a worked addition example and a review checklist.
12 min Turning a garage into a room or an ADU almost always needs a garage conversion permit. See what the permit office checks, what the plan set shows, a worked 400 sq ft example and why changing less gets you through faster.
12 min A site plan is a scaled top-down drawing of a whole lot: boundaries, buildings, paving, utilities and the distances between them. Here is what to include, a worked lot coverage example and who can draw one.
12 min A roofing estimator turns a roof into a scope you can price: measured squares, a pitch factor, a stated waste rate and a line for every edge, layer and penetration. Here is the method, a worked hip roof example and the mistakes that sink bids.
11 min Before you trust AI takeoff software, run it on a plan you already counted. Score misses, extras and length drift per item, then convert each error into material. Worked example: 6 ft of wall drift leaves you 3 sheets of board short.
12 min A lumber takeoff lists every framing piece by size, length, count and wall. Count in a fixed order, convert to stock lengths and add one stated allowance. Worked example: a 20 x 12 ft addition needs 80 studs, 14 plate sticks and 17 sheathing panels.