Twenty years of building homes the neighbors point to.
Mark Stephen Development crafts custom residences and curated developments across Winchester and greater Boston, with a hands-on team and more than fifty completed projects.
Selected Work
A family of trades, led by a builder who still walks every site.
Mark Donnellan founded Mark Stephen Development on a simple idea: take on fewer projects and build each one like it’s your own. Two decades and fifty homes later, the idea hasn’t changed.
Every project pairs Mark’s construction leadership with an on-staff design director and a bench of architects and trade partners who have worked together for years. That’s the difference between a house that gets built and a home that gets crafted.
A body of work, one home at a time.
Own a Mark Stephen home before it hits the market, or move into one that just did.
A select number of homes are underway at any given time. Some are open for early inquiry while they’re still being built, and occasionally a completed home is ready for market.
Everett Avenue
A custom home on one of Winchester’s signature streets, built and finished by our team from the studs to the last fixture.
View the ProjectWord travels fast in a small town.
Borrow twenty years of experience for your own build.
Mark advises homeowners and fellow builders on projects he isn’t building himself. Hourly engagements, honest feedback, no retainer.
Design & plan review
Catch expensive problems while they’re still lines on paper. Feedback on layouts, specs, and finish decisions before you commit.
Builder advisory
For builders running their own jobs: scheduling, budgets, sub strategy, and a second opinion when something on site doesn’t look right.
Site walks
A walkthrough at the moments that matter most: pre-drywall, pre-closing, or whenever you want experienced eyes on the work.
Ready to build something incredible?
We’ll prepare a proposal and walk you through every step of the process.
Get In Touch