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Top-Rated Interior trim and decorative moldings installers in Ontario - Updated Nov 2026

Avatar for Coulson Crown Moulding & Construction
Coulson Crown Moulding & Construction
4.8(
62
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"Great customer satisfaction. Really loved their work. Started day and time he said he would start & finished when he said he would. Very friendly, courteous & respectful of home. Very professional and professional work. Fabulous all the way around ."
Georgian Crown Detail
vaulted ceiling
4 1/4 colonial
Base & Base Shoe Detail
end of wall

+13

Response time11 hrs
Response rate90%
6 neighbors recently requested a quote
Avatar for Circle City Millwork Inc.
Circle City Millwork Inc.
4.8(
11
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"Gabe and his team are great! I definitely will hire them again. Quality of work is outstanding. He did a stacked crown molding that gave our home a whole new look and probably added about 30k in value to the home."
Response time2 days
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"We hired McCormick Home Builders to remodel our living room, and we are beyond pleased with the result. The team was professional, worked efficiently, and Aris design ideas made a huge difference. The room feels so much brighter and more spacious. This was the best decision we made for our home, and we were already planning our next remodel with them."
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+1

Response time6 hrs
Recommended by17%of homeowners
J & S Finish & Supply
3.6(
48
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"I hired jeff too refinish my stair case. He did such a beautiful job that I had him come back and do base molding, fireplace mantel, build some cornice boxes for above my windows and add crown molding to my kitchen. Wouldn't use anyone else for finish work. Great work and very reasonable and trust worthy"
Iron Birdcage with Paint Grade Risers, Solid Tread
 Decorative Header with fluted sides
 Full Mantle with legs
 Designer Iron with end Treads
 Bead board with chair rail

+17

2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Holland & Sons Construction
Holland & Sons Construction
5.0(
5
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 1991

Free estimates

Warranties offered

Our role is simple: listen to your vision, guide you through the process, and deliver quality work you'll enjoy for years to come.\nYour home should be a place you're proud of—one that reflects your style, meets your family's needs, and feels uniquely yours. Whether you're dreaming of a custom fireplace wall, built-in cabinetry, a kitchen or bath renovation, updated living spaces, or quality custom carpentry, the right craftsmanship can make all the difference.\nWith more than 30 years of experience, we help homeowners turn their ideas into finished spaces that are both beautiful and functional. We believe the process should be clear, honest, and stress-free, with open communication and attention to detail every step of the way.\n

Kitchen Island
Kitchen Island
Fireplace Wall
Fireplace Wall
Fireplace Wall

+23

6 neighbors recently requested a quote
Home Pro Remodeling & Construction, Inc.
4.1(
31
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"I hired home pro remodeling to put pavers on my back yard and to install flloring thorough out the whole house I'm super setasfied with the work and the service . The company also provided me great financial options which I used thank you kobi Leo and Lucas for your great service . Highly recommend them for everyone"
Response time5 days
Recommended by77%of homeowners
Avatar for Monroy's Father & Son Construction
Monroy's Father & Son Construction
5.0(
4
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

"I worked with Daniel and he was very prompt and responsive, did exactly what he said he'd do. He worked underneath the house in an area I couldn't access. Took and showed me pics to illustrate the issues and he worked excellently."
Response time12 hrs
Response rate95%
Recommended by75%of homeowners
Avatar for RJAMS Finish Carpentry LLC
RJAMS Finish Carpentry LLC
5.0(
2
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2010

Free estimates

Offers commercial services

"Andrew and his team were extremely proficient and skilled in their work. Always punctual and professional. I was so impressed with their work, I rehired them to fix issues left behind by another after seeing the high quality of work they did. The difference was clear and obvious even to a novice like me. I will need more work done in the future and I would not even consider another vendor or company. I will use them again and again and have already recommended them to any family and friends that would be in need of their services. 5 stars without hesitation."
ADU-Long Beach
ADU-Long Beach
RSF Construction Inc.
1.0(
1
)
Interior Trim and Decorative Moldings - Install

Serving Ontario, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

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FAQs for interior trim and decorative moldings installation projects in Ontario, CA

Installing crown molding can be challenging, depending on the material and your skill level. Lightweight materials like polystyrene and softwoods are easier for homeowners to install themselves, offering a cost-saving option. However, heavier materials like hardwoods and plaster are difficult to work with and require professional installation to achieve a high-quality result. Precision is crucial in measuring, cutting, and fitting crown molding, so hiring a professional ensures the best outcome.

Crown molding is available at various price points, ranging from $1 to $30 per linear foot, depending on the material. This wide range offers options for every budget. Affordable materials like MDF, PVC, and polystyrene provide cost-effective solutions, while premium materials like exotic hardwoods or metal offer a luxurious appearance at a higher cost. Regardless of your budget, you can find crown molding that enhances your home's aesthetic.

Crown molding is installed by professional finish carpenters or painters who specialize in detailed trim work. These experts possess the necessary skills and tools to ensure precise measurements, accurate cuts, and seamless installation. By hiring a professional, you can achieve a flawless finish that enhances your home's aesthetic appeal without the risk of common DIY mistakes.

Crown molding can be installed in various areas of your house to add elegance and architectural interest. It is commonly used where walls meet the ceiling, but you can also place crown molding around doors, windows, mirrors, and atop cabinets. Installing crown molding in these locations enhances visual appeal, creates a cohesive design, and adds a touch of sophistication to your home's interior.

To determine how much crown molding to purchase, start by measuring the length of each wall where you plan to install crown molding and add the measurements together to determine the total linear feet required. Purchase an extra 10% of material to account for waste from cutting angles and to ensure seamless joints by using full-length pieces when possible. Including additional material helps avoid shortages and ensures a smooth installation process.

For a professional crown molding installer, this task takes about 1 to 3 hours per room, depending on size and complexity. Factors like the material, design intricacy, and number of corners can affect the time. If you're doing it yourself, expect it to take longer as you get the hang of measuring and cutting precise angles. Advanced measuring and planning or hiring a pro can help the project go smoothly.

The Ontario, CA homeowners’ guide to interior trim and decorative moldings installations

From average costs to expert advice, get all the answers you need to get your job done.