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Finish & Trim Carpentry in the Twin Cities

Casing, crown, baseboard, board-and-batten, wainscoting and interior doors — installed with tight joints and clean reveals by a licensed Minnesota crew. Send photos and hear back within one business day.

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Trim is the part of a room people notice without knowing why. Straight baseboard scribed to a wavy floor, crown with coped inside corners, casing with even reveals — that is the difference between a house that feels finished and one that feels almost done. JMB Builders does that work across the Twin Cities metro, from a single accent wall to a whole-home trim package.

Every page in this section is one job, priced the way we price it, with the questions homeowners ask before they book. Pick the one that matches yours and send three photos.

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Finish Carpentry jobs we do (47)

Casing and baseboard (14)

Oak-trimmed window beside a built-in hutch in a dining room

Baseboard & Casing Installation

Straight lines, tight miters, and coped inside corners — baseboard and window & door casing installed room by room or across your whole home.

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White-trimmed picture window high in a stairwell under a modern chandelier

Built-Up Baseboard — Base Cap and Tall Base From Flat Stock

Short builder base looks small under tall ceilings or new casing. Add a cap and shoe to what is there, or build a taller base from flat stock and a cap, without buying a wide one-piece profile.

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Three-window bay with white casing and a bright country view

Bullnose Corner Trim — Casing and Base at Rounded Drywall Corners

Rounded drywall corners look fine until you run baseboard around them or try to case a doorway that has no square edge. Here is how we trim them so the corners look intentional.

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Oak-trimmed casement pair over the kitchen sink with black hardware

Chair Rail Molding Installation — Height, Profiles and Corners

Chair rail is the cheapest trim that makes a room look designed: one line at the right height, dead level, with corners that meet. We set the height on your wall before we cut a piece.

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New bay window with white casing and seat board, centered in a quiet room

Picture Rail Installation — Moulding and Hooks for Hanging Art

The rail near the ceiling in a 1900s house that lets you hang and move pictures on hooks and cord — put back where a remodel pulled it out, or added to a room that never had it.

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Twin double-hung windows with white trim looking out over a lawn

Plinth Block and Rosette Corner Block Door Trim

Corner blocks and plinths are the trim that lets the casing be square-cut and still look right, and the trim that makes an old Minneapolis or St. Paul house look like itself again.

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Quarter Round After LVP — Shoe Molding After New Flooring

The flooring crew left and there is a gap along every wall. We close it with shoe molding or quarter round, coped at the corners, so the floor looks finished.

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Flooring Transition Strip Installation — Reducers and T-Molding

The new floor stops at the doorway with a raw edge, or the flooring crew left the transition strips in the box. We fit and set them so every doorway is finished and nothing catches a foot.

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Flush Mount Wood Floor Vents — Registers and Return Grilles

New hardwood or LVP with a stamped metal register sitting on top of it looks unfinished. A flush vent in the same wood, or a matching vinyl one, disappears into the floor.

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Half Wall Cap and Trim — Pony Wall and Knee Wall Caps

A half wall with a drywall top is a shelf that gets dented and a corner bead that shows. A cap turns it into a piece of trim you can set a coffee cup on.

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Window Trim & Casing for New Construction

Wood jambs and casing added to every window and patio door your builder wrapped in drywall — installed after closing, before or after you move in, by a licensed Minnesota contractor.

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MDF vs Wood Trim — Which to Choose for Painted Trim

Standing in the molding aisle between the brown primed boards and the white primed boards? Here is how a trim carpenter picks, room by room.

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Replace Oak Trim With White Trim — Whole-House Casing, Base and Doors

Honey oak casing, oak six-panel doors and oak base in every room, and you want it white. Here is how the whole house gets done in the right order, without paying for the same wall twice.

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Basement Finishing Trim Carpenter — Doors, Casing and Baseboard

The drywall is done and the basement is a set of bare openings. We hang the doors and run every stick of trim so the space is ready for paint and carpet.

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Ceilings and walls (15)

Crown Molding Installation

Crisp corners, seamless joints, and profiles that fit your home — crown molding installed by a licensed Minnesota contractor who treats trim as a craft, not an afterthought.

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Coffered Ceiling Installation and Box Beams

A flat eight-foot ceiling becomes the best thing in the room. The trick is the layout and what the beams are screwed to; we do both before a beam is built.

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Tray Ceiling Trim — Crown and Molding in a Stepped Ceiling

Builders leave the tray as a drywall step. Crown at both edges, run tight and coped, is what makes it read as a ceiling detail instead of a drop.

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Tongue and Groove Ceiling Installation — Pine or Cedar Plank Ceiling

A wood plank ceiling is the cabin look, and it belongs in a great room, a four-season porch or over a kitchen as much as at the lake. The job is furring, layout and a joint that stays tight through a Minnesota winter.

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Beadboard Ceiling Installation — Porch or Interior

A beadboard ceiling hides a bad popcorn ceiling inside and turns a plain porch into a place to sit. The job is the furring, the layout and the edge; we do all three.

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Ceiling Medallion Installation — Around a Chandelier or Light

A medallion is a piece of trim that happens to be round and overhead. Centered, fastened into framing and blended into the ceiling, it looks like plaster. Stuck up with adhesive alone, it sags.

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Wainscoting & Picture-Frame Molding Installation

Board-and-batten entries, picture-frame dining rooms, statement accent walls — architectural wall trim designed for your space and installed with millwork-quality precision.

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Board-and-Batten Wall Installation

Even batten spacing, level cap rails, and layouts that land clean around outlets and windows — board-and-batten walls built to fit your room, not a template.

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Shiplap Accent Wall Installation — Nickel Gap, MDF or Pine

One shiplap wall behind the bed, the sofa or the TV changes the whole room, if the gaps are even and the last board at the ceiling is not a sliver. We lay it out so it lands right.

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Slat Wall Installation — Wood Slat Accent Walls

Slat walls look simple and are unforgiving: one gap off by a sixteenth shows from the doorway. We build them plumb off a jig, on a dark backing, around whatever is on the wall.

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Fluted Wall Panel Installation — Reeded Accent Walls

Vertical fluted panels behind a bed, on a fireplace wall or down a hallway — hung level, seams hidden in the flutes, outlets cut cleanly, and edged so the wall has a finished stop.

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Library Wall Paneling — Raised Panel and Flat Panel Wood Walls

A study or office with plain drywall, and you want the full-height paneled look of a library. We lay it out, build it on the wall, and trim it to the ceiling.

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Wainscoting on Stairs — Angled Trim Along the Staircase Wall

The wall beside the stairs is the one wall in the house where every cut is on an angle. We lay it out from the nosings so the trim climbs with the stair and lands level at the top.

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Wall Niche Trim — Recessed Shelf Between Studs, Boxed and Cased

A recessed shelf in a hallway, a nook beside the shower for shampoo, a spot for the keys by the door — built into the wall cavity you already have and trimmed so it looks like it was always there.

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Interior Column Wrap — Box In a Basement Support Post

The steel post in the middle of the finished basement is not going anywhere. We box it in so it looks like part of the room instead of something the framer forgot.

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Doors and openings (9)

Interior Door Installation & Replacement

Doors that close with a solid click, swing true, and match throughout the house — bedroom, bathroom, and closet doors installed by a licensed contractor who hangs doors for a living.

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Interior French Door Installation

Two doors that meet in the middle with an even gap, close without a rattle, and stay that way — interior French doors fitted and hung by a licensed Minnesota contractor.

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Labor-Only Door Installation — We Install the Door You Bought

You buy the door, we install it right — entry doors, house-to-garage doors, and interior doors hung plumb, sealed tight, and trimmed out by a licensed Minnesota contractor.

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Closet Door Casing After Drywall — Jamb, Casing and Closet Doors

The bedroom is painted, but the closet opening is still bare drywall corners or raw studs. We set the jamb, case it and hang the door so the room is done.

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Reframe a Closet Opening — Wider Doors or an Open Nook

A narrow closet door you cannot get a bin through, or a closet you would rather have as an open reading nook or shelving wall — we reframe the opening and finish it so it looks original.

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Pediment Over a Door — Decorative Crown Cap on Interior Casing

The head casing over a door is a flat board. A pediment makes it a header: a band, a crown and a cap that turn an ordinary opening into the one people notice.

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Attic Hatch Trim — Casing, Painted Panel and Insulated Lid

The scuttle hole with a raw drywall edge and a loose square of drywall dropped on top of it: we case it, build a real lid, seal it and insulate it.

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Attic Ladder Installation — Pull-Down Stairs, New or Replacement

A hallway scuttle hole you need a stepladder for, or an old attic ladder that groans every time it opens — we frame the opening, set the new unit level and case it so it looks like part of the ceiling.

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Recessed Medicine Cabinet Installation — Cut Into the Wall and Cased

The surface-mount cabinet sticks out over the sink and hits your head — swapped for one that sits in the wall, flush with the tile or paint.

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Kitchen and cabinet trim (7)

Crown Molding on Kitchen Cabinets and Light Rail Installation

Your uppers stop short of the ceiling, or the under-cabinet lights show from the table. We add the crown and the light rail so the kitchen reads as finished.

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Refrigerator Enclosure Cabinet and Cabinet End Panels Installation

The fridge stands alone with a bare cabinet side next to it, or the new counter-depth unit left a gap. We build the box around it and finish the exposed sides.

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Kitchen Island End Panels, Legs and Corbels — Trim Out an Island

The island is a box of base cabinets with a bare back and plain ends. We wrap it in panels, add legs at the seating side and corbels under the overhang so it looks built for the room.

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Range Hood Surround — Custom Wood Hood Cover Built On Site

You want a wood hood over the range instead of a stainless box. We frame the surround, skin it, trim it and fit it over the liner insert so it reads as part of the cabinets.

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Kitchen Pass-Through Trim — Casing and a Counter Cap on the Opening

The serving window between the kitchen and the dining room: a level counter cap, jambs and casing on both sides, whether we are finishing one, replacing a swollen sill, or cutting a new one through a non-bearing wall.

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Cabinet Knobs and Pulls Installation — New Holes Drilled on a Jig

Fifty new pulls in a box and a kitchen of doors with the old holes in the wrong places — drilled on a jig, straight and matched, one afternoon.

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Radiator Cover Installation — Custom Wood Radiator Cabinets

Half the houses in Minneapolis and St. Paul still heat with cast iron radiators. A cover makes one a window seat, a shelf under the window or a piece of trim instead of a thing to walk around.

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Other kinds of work

Where we work

Finish carpentry near you

Based in Zimmerman, scheduling across the Twin Cities metro. Closest first:

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