Homebuilding Terms, Explained in Plain English

Nobody expects you to arrive fluent in this. But there’s a stretch early on where everyone around you is using words like draw, allowance, and rough-in as though they’re obvious, and asking feels like admitting you’re out of your depth.

You’re not. It’s just vocabulary. Here’s the set you’ll actually run into, grouped by where you’ll hit it, with a note on why each one matters when it costs you something.

Money and contracts

Allowance. Money set aside in your contract for something you haven’t picked yet, like flooring or lighting. Why it matters: set low, it makes a bid look cheap and the difference comes back as a change order later. Always ask what each allowance is in dollars. See allowances and selections.

Bid or proposal. A builder’s price for your project. Why it matters: two bids are only comparable if the same scope, allowances, and square footage sit behind both.

Change order. A written, signed amendment that changes the scope, price, or schedule. Why it matters: it should always be written and signed before the work happens. Verbal change orders are where disputes come from.

Contingency. Money held back for the unexpected. Your lender may require one. Why it matters: ask who holds it and what happens to whatever’s left at the end.

Cost plus. A contract where you pay the actual cost of the work plus the builder’s fee. Why it matters: the starting number is an estimate, and overages are yours.

Draw. A release of construction loan funds after a milestone is completed and inspected. Why it matters: your interest payment goes up with each one.

Fixed price. A contract where the builder commits to a number and absorbs the difference if the agreed scope costs more. Why it matters: it’s only as good as the pricing work behind it. See fixed price vs. cost plus.

Hard costs and soft costs. Hard costs are materials and labor. Soft costs are permits, engineering, design, and fees. Why it matters: some bids include soft costs and some don’t, and that alone can explain a large gap between two numbers.

Lien waiver. A signed document from a subcontractor or supplier confirming they’ve been paid and waiving their right to file a claim against your property. Why it matters: without them you can pay your builder in full and still face a mechanic’s lien. Ask for them with every draw.

Retainage. A percentage of each payment held back until the project is complete. Why it matters: it’s normal, but it affects your builder’s cash flow, so everyone should know it’s there going in.

Scope of work. What’s included in the contract, and what’s excluded. Why it matters: the exclusions list is the more informative half.

Land and site

Building envelope. The buildable area of your lot after setbacks, easements, and restrictions are subtracted. Why it matters: on a view lot, the envelope and the best view aren’t always in the same place.

Easement. A recorded right for someone else to use part of your property, often for access or utilities. Why it matters: it can restrict where you build.

Frost depth. How deep the ground freezes. It’s 24 inches in Kootenai County, and footings have to go below it.

Geotechnical report (geotech). A soils engineer’s analysis of what’s under your site and what the foundation needs to account for. Why it matters: required on many hillside lots here, and it can change your foundation design and cost.

Grading. Reshaping the ground for drainage and to create a building pad.

Perc test / site evaluation. Testing whether soil will absorb water well enough for a septic system. In Kootenai County this goes through Panhandle Health District. Why it matters: this is the single test that can make a parcel unbuildable. Do it before you close.

Setback. The minimum required distance between your structure and the property lines.

Site work. Everything that prepares raw land for a house: clearing, excavation, grading, driveway, septic, and running utilities in. Why it matters: it’s the line item that varies most, from roughly $75,000 to $185,000 on the mountainside lots we’ve built on.

Snow load. How much weight of snow a roof must be designed to carry. Why it matters: above 70 psf ground snow load in Kootenai County you leave the prescriptive code path and need engineered design. See permits, snow load, and wildfire rules.

WUI (wildland urban interface). Where development meets wildland vegetation. Why it matters: it drives insurance cost and availability here more than it drives code.

Design and permits

Certificate of occupancy (CO). The document saying the home is legally habitable. Why it matters: it requires final approvals from every agency with jurisdiction, not just the county.

Construction drawings / blueprints. The detailed drawings the house is permitted and built from. Different from concepts or schematics, which come earlier.

Elevation. A drawing of one exterior face of the house, straight on.

Plan review. The county’s review of your drawings before a permit is issued. Generally a few weeks in Kootenai County.

Rendering. A realistic image of a design that hasn’t been built. Why it matters: worth knowing whether a photo on a builder’s website is a rendering or a finished house. Ask.

Site plan. A drawing of the whole property showing the house, driveway, septic, well, and structures.

Specifications (specs). The written document listing materials, brands, and models. Why it matters: the drawings show where things go, the specs say what they are.

During construction

Dried in. The point where the roof, windows, and exterior doors are installed and the building is closed to weather. Why it matters: in North Idaho this is the milestone that decides whether winter stops your build or not.

Footing. The widened concrete base beneath the foundation wall that spreads the load into the soil.

Framing. Building the skeleton of the house: floors, walls, and roof structure.

Punch list. The final list of small corrections before the project is considered complete.

Rough-in. Installing plumbing, electrical, and HVAC inside the walls before they’re closed up. Why it matters: this is the last easy moment to move an outlet, a fixture, or a shower head.

Sheathing. The structural panels applied over the framing before siding or roofing.

Slab on grade. A concrete floor poured directly on prepared ground, with no crawl space or basement under it.

Stem wall. The short foundation wall between the footing and the floor system.

Subcontractor (sub) and trade partner. The specialty companies who do the actual work: excavation, concrete, framing, plumbing, electrical, drywall, and so on. Why it matters: your builder’s relationships with these companies affect your schedule and your price more than almost anything else.

Substantial completion. The point where the home is finished enough to occupy for its intended use, even with punch list items remaining. Why it matters: it often triggers contract deadlines and final payment, so check how your contract defines it.

Walkout. A lower level that opens to grade on the downhill side. Common here for a reason: on a sloped lot, it’s the most affordable square footage you’ll ever add.

Finishing up

Final walkthrough. You and your builder going through the house together to confirm everything is complete and generate the punch list.

Millwork. Finished wood elements made in a shop: trim, cabinetry, built-ins, stair parts.

Warranty period. How long the builder covers defects after completion. Typically 1 year on workmanship, 2 on systems, and longer on major structural elements, though it varies. Why it matters: ask a past client how their warranty period actually went.

Still stuck on a word?

If something comes up that isn’t here, ask whoever used it. Any builder worth hiring would rather explain a term twice than have you nodding along and agreeing to something you didn’t follow.

If you want the money side in one place, what it really costs to build here is the place to start.