Open the estimate for Ridgeline 40×60 Shouse and the Interior from the floor plan card prices what was drawn: 18 assemblies, $75,652.00 — drywall, insulation, paint, nine interior doors, base trim, two closets, the shop's sealed concrete, LVP and tile, cabinets and tops, two tub and shower inserts, two full baths, the kitchen, the laundry, the water heater, electrical and a heat pump. Each line has its quantity, your unit price and a coloured edge for its trade. The card's header says Not on the estimate until you press Add interior to estimate.

Settings, Estimating, Interior assemblies holds a unit price for each assembly in the unit you already quote it in: drywall $2.25 a square foot of board hung and finished, interior doors $325 each prehung with hardware and casing, a full bath's plumbing $4,500. Each row says what its quantity counts, carries a trade, switches on or off, renames, and resets to the builder-grade default. Save assemblies prices the next interior added to an estimate.

The counts come from what is drawn, and each line says so. 2 full baths (rooms labelled Bathroom). 1 water heater placed in the plan — and with none placed, one is assumed because there is a bath, kitchen or laundry, and the line says that instead. 9 interior doors drawn in the plan (1 cased opening with no door not counted). 2 tub or shower placed in the plan. Add a door or change what a room is, and the count follows.

Cabinets are priced by the linear foot of base, tall, vanity and island cabinet placed in the plan — 16.5 LF across 6 cabinets, rounded up to 17 LF at $225, with wall cabinets riding in the rate. Tops follow the cabinets that carry one: 18.5 LF of butcher block over 7 cabinets. Tub and shower inserts are counted by the fixture.

Each floor finish is its own assembly — sealed concrete, luxury vinyl plank, tile, carpet, hardwood, epoxy — priced off the rooms finished in it, net of cabinets, tubs and showers, with waste. On the 40×60 the shop's 728 sq ft of sealed concrete is $1.50 a foot, 1,190 sq ft of LVP $4.50 and 331 sq ft of tile in the baths, laundry and mudroom $11.00 — three lines, not one blended number.

Electrical and HVAC each come two ways. Electrical — all-electric, per sq ft prices the living area; switch it off and Electrical — per device prices the 65 receptacles, switches, lights, fans and alarms placed in the plan instead. HVAC — heat pump, per sq ft or HVAC — per ton: 2.5 tons, one ton per 600 sq ft of living area, and the line says plainly it is a rule of thumb and a Manual J governs.

Press Add interior to estimate and it lands under Services & add-ons as one group: Interior — from the floor plan, 18 lines, $75,652.00, each line with its quantity and rate and tagged with its trade — drywall as Drywall, insulation as Insulation, paint as Paint. Remove these lines lifts the whole group back out. The card's header now reads On the estimate.

Because every interior line arrives tagged, Show one trade splits the finish-out by sub straight away. Plumbing on the 40×60 is five lines — the inserts, two full baths, the kitchen, the laundry and the water heater — $16,100.00 before markup, ready to print for the plumber. How the tags work is on trade colours on estimate lines.

Lines on an estimate keep the price they were added at. Raise drywall to $2.50 and the card tells you: the interior on the estimate ($75,652.00) differs from the plan at today's prices ($77,092.25). It stays as it is unless you replace it. Replace interior lines asks first, and says that any change made to those lines by hand is replaced too. Opening an estimate never adds, updates or re-prices them.

In the 3D builder, the floor plan's Takeoff window shows Priced interior — 18 assemblies at your prices, $75,652.00 above the material counts, with every line one click away. It is read-only: the plan is still changing, so the button that puts the interior on a quote lives on the estimate. The counts themselves are the interior takeoff.