Interior Trim & Millwork Contractors

Details that make a house feel finished

Crown molding, custom doors, built-in bars, wine racks. All of these are the very important finish work that separates a house from a home. Bay State Design & Construction handles interior trim and millwork with the same craftsmanship we bring to every project, from a simple baseboard install to fully custom woodwork.

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Close-up of white crown molding at the ceiling meeting pale green walls in an interior corner.
Logo of the National Association of Home Builders with a roof shape over the acronym NAHB.Black circle badge with NKBA logo and text reading Remodeling Specialist and NKBA Specialty Badge Program.Blue and white Better Business Bureau accredited business badge with torch symbol.Thumbtack logo above a blue hexagon with a yellow star and text Top Pro.Circle badge with text 30-HOUR OSHA CERTIFIED and a blue and gray OSHA logo.
42+
Years of Combined
Team Experience
763+
Completed
Projects
5★
Homeowner
rating Average

Our Approach

Sometimes the smallest changes make the biggest difference

Finish carpentry is where a project either comes together or falls apart. You can have a beautifully remodeled kitchen or a stunning addition, but if the trim is poorly cut, the doors don't hang right, or the molding doesn't match the character of the home, it shows.

We treat millwork and finish carpentry as seriously as any structural work. Because in a finished space, it's what you actually see and touch every day. Whether it's running baseboard through a whole home, installing a set of custom French doors, or building a wine rack from scratch, the standard is the same.

What's Possible
Baseboard and trim
Crown molding
Door and window casing
Interior doors
French doors
Barn doors
Pocket and bifold doors
Sliders and accordion doors
Custom bars
Custom wine racks
Saunas

Trim and millwork often come at the tail end of a bigger project — a remodel, an addition, or a whole home renovation. If your project is growing, our FlexUnit™ service might be the smarter path.

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BSDC Logo badgeModern kitchen with white cabinets, marble island, stainless steel stove, and hanging pendant lights.

Reasons to invest in millwork

When does trim and millwork make a difference?

  • Your home has been renovated but the finish work hasn't kept up
  • You want crown molding, wainscoting, or custom casing that actually fits the style of your home
  • Doors are hollow, mismatched, or just not right for the space
  • You've always wanted a built-in bar or wine rack and want it done properly
  • You're finishing a basement or addition and need the millwork to match the rest of the house
  • You're preparing to sell and want the interior to feel polished and intentional
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What we can build

Most requested projects

When it comes to interior trim and millwork construction, we've done it all. Here's a sampling of our most requested design projects.

White decorative baseboard molding on wall corner above wood-look tile flooring.
Baseboard, trim, and molding
We run baseboard, install crown molding, and handle door and window casing with clean cuts and tight joints so it holds up for years to come.
Close-up of white crown molding at the ceiling meeting pale green walls in an interior corner.
Crown molding
One of the most effective ways to add character to a room. We work with standard profiles and custom millwork depending on ceiling height/room style.
Narrow hallway with natural wood sliding barn door and matching hinged door at the end.
Interior doors
French doors, barn doors, pocket doors, bifold, sliders, and accordion doors. We help you choose the right one for the application like swinging, sliding, or folding, and install it so it operates the way it should.
Custom built modern bar interior with wood-paneled counter, concrete countertop.
Custom bars
A properly built bar is a piece of furniture and a piece of construction at the same time. We've built custom bars in basements, living rooms, and outdoor spaces — designed around how you want to use the space and built to last.
Wine bottles stacked horizontally in a wooden rack with a glass lying on its side.
Custom wine racks
From a small built-in to a full dedicated wine room, we design and build wine storage that's both functional and worth showing off.
Man installing wooden bench panels inside a residential sauna.
Saunas
Custom sauna builds for basements and dedicated wellness spaces. We handle the framing, paneling, and finish work to create a space that performs and looks the part

Our Portfolio

Snapshots of recent projects

Modern kitchen with white cabinets, stainless steel appliances, hardwood floor, and a large island with stools.Wooden frame construction of a house extension with green floor panels and ladder leaning inside.New kitchen under construction with white cabinets, open shelves, island base, and wood floors.Concrete foundation pit next to a house under construction with a folded ladder nearby.Modern kitchen with white cabinets, stainless steel appliances, a central island, and three gray bar stools.House under construction with green ZIP System sheathing panels and a red ladder leaning on the side.

REviews

Hear from happy homeowners

Great guys and easy to work with! I couldn't be happier with my beautiful new kitchen!

Steven M.

The best! Gave a super reasonable estimate and walked me through all the steps and timeline , finally have my (dream) kitchen.

Theresa C.

I highly recommend Bay State Design & Construction to anyone looking for reliable, skilled, and professional construction services.

Peter S.

These guys are amazing! Helped me build a two story addition with a master suite and I couldn't be more thrilled with the product.

Alyssa F.

The guys from Bay State design were prompt well priced and kept my project moving without missing a step. Great work guys!

Joshua H.

I hired these guys to build an attached garage at my house. Throughout the entire process they went above and beyond all expectations and their pricing was super fair.

Vlad A.

This team is very professional, communicative and great to work with. Gio provided comprehensive building plans for me within a short timeframe, as promised.

Katie S.

How it Works

Typical kitchen remodel process

1

Site Visit & Consultation

We visit your home, meet with you, and walk through your vision, goals, and any structural considerations.

2

Detailed estimate

We develop a thorough estimate based on your agreed scope of work — no surprises, no vague line items.

3

Contract & Design Session

Once you accept the estimate, we send over a contract and schedule a design session to lock in materials, finishes, and layout.

4

3D Render & Construction docs

We produce a 3D rendering of your space and all structural construction documents entirely in-house.

5

Permits & materials

We apply for all required permits and order long-lead materials as soon as they're issued — keeping your project on schedule.

6

Construction & inspections

Work begins. We manage every phase of construction and every required inspection through final sign-off so nothing gets missed!

Person holding clipboard with house floor plan in a modern white kitchen.
Contract on clipboard with pen, blueprints, kitchen photos, and flooring samples on wood table.
Wooden framing structure of a house under construction with sunlight casting shadows inside.
Person using a ruler and pen to draw on architectural blueprints on a wooden table.
Stacks of wooden planks and bricks stored inside a sunlit warehouse or workshop.
Wooden framing structure of a house under construction with sunlight casting shadows inside.
Person holding clipboard with house floor plan in a modern white kitchen.
1

Site Visit & Consultation

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We visit your home, meet with you, and walk through your vision, goals, and any structural considerations.

Contract on clipboard with pen, blueprints, kitchen photos, and flooring samples on wood table.
2

Detailed estimate

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.

We develop a thorough estimate based on your agreed scope of work — no surprises, no vague line items.

Wooden framing structure of a house under construction with sunlight casting shadows inside.
3

Contract & Design Session

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.

Once you accept the estimate, we send over a contract and schedule a design session to lock in materials, finishes, and layout.

Person using a ruler and pen to draw on architectural blueprints on a wooden table.
4

3D Render & Construction docs

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.

We produce a 3D rendering of your space and all structural construction documents entirely in-house.

Stacks of wooden planks and bricks stored inside a sunlit warehouse or workshop.
5

Permits & materials

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.

We apply for all required permits and order long-lead materials as soon as they're issued — keeping your project on schedule.

Wooden framing structure of a house under construction with sunlight casting shadows inside.
6

Construction & inspections

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.

Work begins. We manage every phase of construction and every required inspection through final sign-off so nothing gets missed!

Bay State Design & Construction

Why homeowners choose BSDC

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One point of contact, start to finish

No chasing down architects, contractors, or permit offices. You have one team and one person to call, from first sketch to final walkthrough.

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We design around your budget

Many firms design the dream, then hand you a bill that doesn't match it. We start with your number and build the plan around it — no sticker shock.

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Your vision survives the build

A lot gets lost when the design firm hands off to the contractor. We can draw the plans and build to them. AKA: what you approved is what gets built.

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Your timeline is ours to protect

When design and construction live under one roof, no one else's schedule can slow yours down. We control the process so you're not waiting on a separate third party to move forward.

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You focus on the fun part

Finishes, fixtures, how it all comes together — that's your job. Permits, inspections, scheduling, and the heavy lift? That's ours.

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75% of our work comes from referrals

We don't take that lightly. It means our clients trust us enough to send their family and neighbors our way. And we intend to keep earning that.

Frequently Asked Questions

Interior trim and millwork FAQs

Millwork refers to wood products that are manufactured or custom built for use in interior finishing — trim, molding, doors, built-ins, and decorative woodwork. It's the finish layer that gives a space its character and polish.

Yes. Finish carpentry is typically one of the final phases of any addition or remodel we do. If you're working with us on a larger project, millwork and trim are part of the scope.

In most cases, yes! We assess the existing profile and source material that matches as closely as possible. Older homes with custom or non-standard profiles may require custom milling — we'll tell you upfront what's involved.

Both. We can source and supply doors or install ones you've already purchased. Either way we make sure the installation is done correctly — properly hung, shimmed, and trimmed out.

Yes. Custom bars and wine racks don't need to be part of a larger remodel, either. We can treat them as their own project — site visit, design, and build.

It depends entirely on scope. Running baseboard through a single room takes a day. A full home trim package, custom doors, and built-ins is a multi-week project. We give you a clear timeline during the estimate.

Every project comes with a 1-year workmanship warranty. If something isn't right with our work, we come back and make it right.

Finish your space the right way!

Details like interior trim and custom millwork can really make a space feel finished. Let's talk about what your home deserves.

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