Home Improvement & Construction Services
Ontario Builders delivers expert craftsmanship across every phase of residential construction. Whether you need a single room refreshed or an entire home transformed, our skilled team brings precision, reliability, and pride to every project we take on.
Kitchen Remodeling
Custom cabinetry, countertops, flooring, and layouts designed for the way you cook and live.
Learn More →Bathroom Remodeling
Walk-in showers, vanities, tile work, and accessibility upgrades that elevate your daily routine.
Learn More →Roofing
Full roof replacements, repairs, and inspections to keep your home protected through every season.
Learn More →Deck & Porch
Custom-built decks, porches, and outdoor living spaces that extend your home into the outdoors.
Learn More →Siding
Durable vinyl, fiber cement, and wood siding installation to boost curb appeal and weather protection.
Learn More →Drywall
Professional drywall hanging, taping, mudding, and finishing for seamless walls and ceilings.
Learn More →Room Additions
Expand your living space with structurally sound additions that blend seamlessly with your existing home.
Learn More →General Remodeling
From honey-do lists to full renovations, we handle every detail so your home looks and functions its best.
Learn More →Your Project in Four Simple Steps
We have streamlined the home improvement process so you always know what to expect. From your first phone call to the final walkthrough, Ontario Builders keeps things transparent, on schedule, and stress-free.
Free Estimate
Call us or fill out our online form. We will visit your property, listen to your goals, and provide a detailed written estimate at no cost.
Custom Plan & Pricing
We collaborate with you on design choices, materials, and timeline. You get a clear scope of work and transparent pricing before we start.
Expert Construction
Our experienced crew gets to work, keeping your property clean and communicating progress every step of the way.
Final Walkthrough & Your Approval
We walk through the completed project together. We do not consider the job done until you are completely satisfied with the results.
Built on Craftsmanship, Driven by Integrity
Ontario Builders was founded in 2022 by Stephen Bolster with a straightforward mission: deliver honest, high-quality construction work at prices Central New York homeowners can actually afford. Based in Mexico, NY, Stephen built this company on the belief that every homeowner deserves a contractor who shows up on time, communicates clearly, and treats their home with respect.
What started as a one-man operation handling repairs and small renovations has grown into a trusted general contracting company serving a 50-mile radius. From kitchen and bathroom remodels to full roof replacements and custom deck builds, Ontario Builders has completed over 200 projects for homeowners across Oswego, Onondaga, and Jefferson counties. Every job is backed by full insurance coverage and a commitment to getting it right the first time.
Stephen and his team take pride in building lasting relationships with their clients. Many of Ontario Builders' projects come from repeat customers and referrals, which speaks to the quality of work and the trust that has been earned in the community. When you hire Ontario Builders, you are not getting a faceless corporation — you are getting a local craftsman who stands behind every nail, board, and finish.
More About Us →
Recent Projects
Take a look at some of the home improvement and construction projects we have completed for homeowners across Central New York. Every project reflects our commitment to precision, quality materials, and client satisfaction.
Reviews from Homeowners Like You
Common Questions About Ontario Builders
Ontario Builders serves a 50-mile radius from Mexico, NY, covering communities across Oswego, Onondaga, Jefferson, Lewis, Cayuga, and Oneida counties. Whether you are in Syracuse, Watertown, Fulton, Pulaski, or any of the smaller towns in between, we are happy to provide a free estimate for your project. If you are unsure whether you fall within our service area, give us a call at (315) 236-5710 and we will let you know.
Yes, Ontario Builders is fully insured. We carry general liability insurance and workers' compensation coverage to protect both our clients and our crew on every job site. We are happy to provide proof of insurance upon request before any work begins.
Absolutely. We provide free, no-obligation estimates for every project. Call us at (315) 236-5710 or fill out our online contact form and we will schedule a time to assess your project and provide a detailed, written quote. There is never any pressure — just honest pricing so you can make an informed decision.
Ontario Builders handles all phases of residential construction and home improvement. Our services include kitchen remodeling, bathroom remodeling, roofing, deck and porch construction, siding installation, drywall, room additions, and general remodeling. From small honey-do list items to complete home renovations, no project is too big or too small for our team.
Getting started is easy. Simply call us at (315) 236-5710 or fill out the contact form on our website. We will schedule a convenient time to visit your property, discuss your vision, and provide a free written estimate. Most estimates are scheduled within a few days of your initial call.