Verified record
Duffy Development is a Massachusetts builder and remodeler whose work spans custom homes, additions, and renovations. Its public profiles place it in Needham, while company information identifies John Duffy as president; a BBB profile separately lists the Minnesota company as established in 1986. The written customer accounts are dated 2020–2022, but they are unusually specific. Homeowners describe whole-house renovations, kitchens, bathrooms, decks, basements, carpentry, insulation, painting, and roof work; they repeatedly mention clear planning, crews who cleaned up, and projects finishing on time or faster than expected. One 2020 reviewer described a $252,000 renovation with the phases kept on time and budget; another said a kitchen, painting, carpet, and roof project finished in a little over a week. There is also a much larger development side: news coverage describes multifamily and affordable-housing projects across Minnesota, Wisconsin, and Iowa, including a portfolio of 23 properties and more than 1,000 units. That is a different scale from the residential renovation accounts, so ask which team and scope would handle your project. For a custom build or substantial remodel, Duffy may fit a homeowner who wants design input and project coordination. Confirm the current license status, recent local references, exact scope, and who will supervise the work before signing.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from DUFFY DEVELOPMENT. Use it to sanity-check bids, then get the real number in writing.
A typical single-level deck is 12×16 — about 200 sq ft.
Estimated range
$7,750 – $14,500
Typical carpentry project around $11,100
“John Duffy, the president of Duffy Development and a general partner for the apartment project, attended a tour on Tuesday, Dec. 17.”
“The project is the result of three years of collaboration between Duffy Development, North Hennepin Community College and the funding arms of Hennepin County, Metropolitan Council and Minnesota Housing.”
“Pondview was built in 2004 by Duffy Development Company, which has developed and continues to own 23 properties including over 1,000 units in Minnesota, Wisconsin, and Iowa.”
“Additional details in the ... come from Plat Research, the Minnesota Secretary ... Office, company documents, online real ... This rendering shows the design of Bottineau Ridge, a new 50-unit workforce apartment building Minnetonka-based Duffy Development is building northeast of the Arbor Lakes retail area in Maple Grove. The project is set to open in early fall 2014. (Submitted rendering: LHB Inc.) ... John Duffy, president of Minnetonka-based Duffy Development Co., is starting work this week on the first of two 50-unit buildings in Bottineau Ridge, a workforce apartment project on land in t”
“Minnetonka-based Duffy Development Co. is developing Sunset Ridge Apartments in Minnetonka.”
Ian and crew have helped me with numerous projects from carpentry to insulation to painting to indoor and outdoor home improvements. He and his team are not only thoughtful and incredibly skilled, but responsive with work of high, high quality. I have an older Victorian home and Ian and his team were design-first and extremely consultative in their approach. Each project we’ve done, I’ve felt at ease to discuss, shift and make decisions with full transparency and trust, which is something I value above all when it comes to home renovation work. I would absolutely recommend Duffy Development for work at any stage of your journey; new home, old home, improvements, you make it!
Duffy Development LLC – we had a total renovation of our house by Duffy Development LLC – Total cost approx. $252,000. Ian Duffy was so helpful in planning out all the phases, staying on time, staying on budget, giving us good options and recommendations on the best way to make this all happen. His crews were always professional, on-time, respectful of our space, and always cleaned up their space before they left at the end of the day. Renovation included: - updated 3 full bathrooms and 1 half bathroom. - Painted the entire house and home office - Updated all lighting in the house with new recess lighting in all our rooms and installed new motion detection lighting in the front and back of the house. - Replaced flooring in 2 rooms - Converted a bedroom into a den and made an entertainment center out of the closet - Complete update of laundry room with new tile floor, a large counter top with shelves above and below. Added additional built in storage shelves. - Updated the front walkway and the walkway that goes around to the back for the office entrance. The original driveway slope down torward the garage with stone walls that were crumbling on both sides. Replaced the driveway stone walls with the same blue stone blocks that matched the walkways. The second driveway that is used for the clients needed an updated cinderblock retention wall to replace the one that was falling apart. We are so happy with how everything came out. We highly recommend Duffy Development LLC for your new and renovation projects! Barry
Ian has helped us re-do our deck and our basement all for very reasonable pricing and high quality work. He is helpful in choosing materials that are high quality and is open to suggestions on aesthetics, but also gives good advice if you’re not sure what you want. We highly recommend him for any type of project. UPDATE: he also just did our front steps and they look beautiful and are safe now. He's definitely helped bring up our property value. He has the pictures posted on this website, recommend you check them out. His coworkers are very professional and make sure to clean up everything when they are done.
Ian and his team redid our kitchen, painted the entire house, laid down new carpet, and fixed our roof. They did a fantastic job! Before starting Ian and Ian (yes, there are two Ian's) examined our house and ran through options. They made sure they described their entire process in detail before starting and presented us with options to tailor everything to our specifications. We have two babies, and I expressed concern to Ian about having the house in a loud, disrupted state for what I assumed would be 3-4 weeks of work. Ian was very receptive to my concerns: his team finished the entire project in a little over a week! We love our new kitchen and we will definitely hire them again for future work.
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1 change recorded — last scanned Sep 4, 2026.
Takes on repairs others declined5.0
Shed craftsmanship5.0
Works with crooked houses5.0
Rescues stalled projects5.0