How to write a trim scope so bids come back apples-to-apples

Write a trim scope by laying out the finish schedule item by item, so every sub who bids it is pricing the same work. For each area, name the base profile and height, the casing style and reveal, whether there's crown and how much it's built up, how closets and pantries get trimmed, the stair parts, whether it runs paint-grade or stain-grade, and who supplies material versus who only installs. When those calls live on the sheet, the bids come back apples-to-apples and you can compare them straight across. When they don't, each sub fills the blanks with his own assumption, and you end up comparing five different scopes that happen to share one budget line.

Why do trim bids come back so different?

Most of the spread between trim bids comes from carpenters bidding different work. One reads "finish carpentry" and prices base and casing. The next assumes cabinets are on someone else's number. A third sees "crown throughout" and pictures a single stock stick, while the guy who's built a lot of these pictures a built-up cornice with three pieces and a lot more labor. Same words on the plan, three different bids, and none of them wrong given what they were handed. A scope that spells out every item is what gets them all bidding the same job.

What goes in a trim scope, item by item?

• Base — profile and height. One-piece or built up, and how tall. A 5 1/4-inch one-piece and a built-up base with a cap and shoe are different material and different labor, and "base throughout" doesn't tell a sub which one you mean.
• Casing — style and reveal. Flat stock, mitered, or a profiled casing with a backband, plus the reveal you want held around each opening — usually about 1/4 inch of jamb left showing. Holding that reveal even on every door and window is most of the work in a casing package.
• Crown — profile and build-up. A single stock crown or a built-up cornice with a bed and a cap. Inside corners on wall crown get coped, which is more labor than a miter, so a heavier build-up is a real line on the bid and not a rounding error.
• Closets and pantries. Easy to leave off and easy to argue over later. Say whether closets get the same base and casing as the rooms, wire or built shelving, and whether the pantry is trimmed out or fitted with cabinetry.
• Stairs — every part. Treads, risers, skirt boards, newels, balusters, and handrail. Stairs carry code and a lot of labor, and "finish the stairs" is the vaguest line on most packages. Name the parts and the material.
• Doors — count and type. How many, prehung or slab, the casing to match, and the hardware. Hanging a door true and holding the reveals around the leaf is some of the fussiest work in the package, so the door count moves the bid.
• Paint-grade or stain-grade. The biggest single driver of how the trim gets built. Paint-grade forgives a caulked joint; stain-grade has to be tight in the wood with the material sorted for color. Call it for every area, because it changes the labor, not just the look.
• Supply vs. install. Who buys the material and who sets it, area by area. This is the line that most often wrecks a bid comparison, so make it explicit.

What does a vague scope cost you?

A vague scope doesn't save you the decision. It moves it to the middle of the job, where it's expensive. "Crown throughout" gets bid as a stock stick, the client wanted the built-up cornice from the model, and now you're writing a change order six weeks in. And when one sub priced base and casing while another priced the whole package including cabinets and stairs, the low bid usually just means a smaller scope, and you find the missing pieces once the crew's on site. Supply versus install is the blank that bites hardest here — we're an install crew and don't supply material, so the scope has to say the builder or shop provides the base, casing, crown, doors, and stair parts and we set them. Same with the trades on our seams: we don't fill nail holes, caulk, or paint, that's the finisher's scope, and the sheet should say so, so two bids don't both skip it or both claim it.

Should a trim scope include quantities?

Put quantities on it wherever you can. A scope that gives linear footage lets every sub price against the same takeoff instead of guessing at it. Base and crown price by the foot — installed, base runs somewhere around $3-8 a linear foot and crown around $5-12, depending on the profile and how much it's built up. Ceiling work like a coffered grid prices by the square foot, often in the $20-50 range once you factor the layout. Our trim takeoff calculator is a quick way to get that footage on paper before the package goes out. For doors, stairs, built-ins, and one-off accents, skip the per-foot math and let the bid answer the price. Those move on their own drivers — how many, how tall, the build-up, paint- or stain-grade, and how out-of-square the room runs, which in a lot of older East-Tennessee stock is more than you'd expect.

Start from a template. We keep a one-page finish carpentry scope checklist that walks these same items — base, casing, crown, closets, stairs, doors, grade, and supply-vs-install — so nothing falls between subs. Pair it with how to spec trim that installs cleanly for the reveal-and-returns detail. When your package is ready, see how we work with general contractors and builders, or send over the plans and we'll put a bid package together.