01
Home Additions
Add the space your home needs with an addition designed around the existing house.
HOME IMPROVEMENT & RENOVATION
Transform the
Home You Have.
Additions, renovations, kitchens, bathrooms and complete interior improvement — with the plumbing, electrical and carpentry work to bring it together. Proudly serving Southwestern Connecticut, primarily Fairfield County and New Haven County.
WHAT WE DO
Construction & Home Improvement
We improve and expand the home you already have — from individual rooms to larger renovation projects.
02
Interior Renovations
Complete interior work from framing and carpentry to walls, floors, fixtures and finish work.
03
Kitchens
Kitchen renovations including layout changes, cabinetry, plumbing, electrical and finishing.
04
Bathrooms
Bathroom renovations covering plumbing, electrical, tile, fixtures and the finished space.
05
Plumbing & Electrical
Plumbing and electrical work integrated into renovation and home improvement projects.
06
Porches & Exterior
Porches, exterior carpentry and other outdoor improvements that add function and character.
ABOUT MARK ONE
Built on 53 years of experience.
Mark One Builders & Home Improvement focuses on additions, renovations and improvement work rather than new-home construction. We help coordinate the work needed to turn an existing space into something better.
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Clear communication throughout the project
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Carpentry, plumbing and electrical work
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Interior and exterior improvements
THE PEOPLE BEHIND MARK ONE
Experience that spans generations.
FOUNDER
Marek Iwaszkiewicz
Marek began working full time in construction in 1973 after moving from Poland as a boy. He founded Mark One Company in 1978 and has spent decades building a reputation around practical experience and hands-on work.
BUSINESS OPERATIONS & CONSTRUCTION PROJECT SUPERVISOR
Kristopher Neiger
Kris began helping in 2022 during his sophomore year of high school. Since then, he has taken on a growing role helping with hands-on construction work, project management, customer relations, sales and day-to-day business operations. He works part time when not attending Providence College.
READY TO START?
Let's talk about your next project.
CONTACT
Tell us what you're looking to improve.
Reach out by phone or email to discuss your addition, renovation or home improvement project.