MHI Renovation Services Inc builds home additions in Yonkers and across Westchester County. We handle design coordination, permits, foundation, framing, and finish work with one licensed and insured team. Founded in 2008 by Julian Martelly, we have added space to colonials, capes, and tudors all over the county. Call (914) 656-0885 for a free assessment.
What Counts as a Home Addition?
An addition is any project that adds finished square footage to your home. In Yonkers and southern Westchester, we most often build:
- Rear and side extensions — a larger kitchen, family room, or first-floor suite.
- Second-story additions — add bedrooms without losing yard space.
- Dormers — turn a cramped attic into a usable bedroom or office.
- Bump-outs — a few extra feet for a dining nook or a bigger bathroom.
- Garage conversions — finished living space where a garage stands today.
How Our Addition Process Works
- Site visit and feasibility. We check setbacks, lot coverage, and structure before you spend money on plans.
- Design and engineering. We coordinate with architects and engineers so drawings match your budget.
- Permits. We file with the local building department and schedule every inspection.
- Construction. Foundation, framing, roofing, and weatherproofing come first, so your home stays protected.
- Finish work. Electrical, plumbing, insulation, drywall, flooring, and paint, finished to match the rest of the house.
Permits and Zoning in Yonkers
Every addition in Yonkers needs a building permit, and most need a zoning review for setbacks and lot coverage. Requirements differ block by block. We prepare the paperwork and represent you through the process — see the Yonkers Building Department for current forms and fees. Our team manages the same process in every Westchester municipality we serve.
What Does a Home Addition Cost?
Cost depends on size, foundation type, and finishes. In the New York metro area, homeowners typically see a wide range: a modest bump-out costs far less than a full second story. A written, line-item estimate is the honest answer. We break out materials, labor, and allowances so you can compare options before demo starts.
Service Area
We build additions in Yonkers, Bronxville, Tuckahoe, Scarsdale, New Rochelle, White Plains, Hastings-on-Hudson, Dobbs Ferry, and throughout Westchester County. Our shop is at 48 Edgewood Ave, Yonkers, NY 10704.
Learn more about our general contractor services in Yonkers or see our home renovation work.
Frequently Asked Questions
How long does a home addition take?
Most single-room additions run two to four months from permit approval to final inspection. Second-story additions take longer. Weather, inspections, and material lead times set the pace, and we share a written schedule before work begins.
Can we live in the house during construction?
Usually, yes. We seal the work zone, keep utilities running, and schedule loud work with you in advance. A full second-story addition may require you to move out for part of the framing stage.
Do you handle the architect and engineer?
Yes. We coordinate design professionals we have worked with for years, or we can work from plans you already have. Either way, one team stays responsible for the schedule and the budget.
Start Your Project
Get a free estimate today. Call (914) 656-0885, email [email protected], or request a quote online. Hours: Monday to Friday 8:00 AM to 5:00 PM, Saturday 9:00 AM to 3:00 PM.