Seamus Costigan
Licensed Real Estate Agent & Investor
Marr & Caruso Realty Group
License: CT-0804225
About Seamus
Seamus Costigan is a high-performing real estate agent and investor based in Stamford, Connecticut, serving clients across Fairfield County. A long-term resident of Stamford who originally immigrated from Ireland, Seamus brings a deep understanding of the local market and community.
With over 20 years of property management experience and 16 years as an active real estate investor in both residential and commercial properties, Seamus offers invaluable practical insights to his clients. His father's 30+ years in the construction sector have also provided Seamus with extensive regional connections among builders, contractors, and local officials.
Throughout his career, Seamus has successfully completed tens of millions of dollars in transaction volume, demonstrating his exceptional negotiation skills, market expertise, and dedication to achieving the best possible results for his clients.
Areas of Expertise
Client Reviews
"Great to work with! I was a first time home buyer and unfamiliar with the process. Seamus took the time to make sure I understood everything. Would definitely recommend to anyone looking for an experienced agent."
Annie Russo
Bought a home in 2026 • 6/26/2026
"Seamus listed and sold our house within 5 days. He walked us through reviewing multiple offers. He hired a great photographer that showcased our home for the quick sale. He is very knowledgeable about Stamford and the current market. We highly recommend him to help you sell your home."
mbergect
Sold a Single Family home in 2021 in North stamford, Stamford, CT • 7/26/2021
"Expect the best from Seamus! Communication and follow up is timely. Seamus knows the Real Estate mkt. and will guide you accordingly. Stays on top of all issues that may arise and keeps you informed. Seamus is highly recommended!"
John Popa
Bought a Condo home in 2021 in Greenwich, CT • 2/3/2021
"Seamus came highly recommended by a co-worker. Moving is such a stressful endeavor and having Seamus on our side was truly comforting. He was extremely knowledgeable about every step, the market itself, and was readily available to answer all of our questions swiftly."
alcsvasconcelos
Sold a Single Family home in 2020 in Turn of river, Stamford, CT • 2/3/2021
"Working with Seamus was amazing. We had heard stories from friends of other realtors who were hard to reach and not forthcoming. That was not our experience at all! Seamus was incredibly communicative and prepared us for every step. We never had to worry about what was next."
kroberts01
Bought a Single Family home in 2020 in Glenbrook, Stamford, CT • 12/27/2020
Recent Transactions
20 Wardwell Street, Stamford, CT 06902
Sold 4 months ago
Buyer
51 Saint Charles Avenue, Stamford, CT 06907
Sold 3 months ago
Seller
50 Barbara Drive, Norwalk, CT 06851
Sold 23 days ago
Buyer
136 Center Street, Stamford, CT 06906
Sold 3 months ago
Buyer & Seller
(Undisclosed Address), Seymour, CT 06483
Sold 21 days ago
Buyer
Performance at a Glance
Total Sales
147 transactions
Recent Activity
14 sales in the last 12 months
Local Investor Knowledge
16+ years experience
Ready to make a move?
Get in touch with Seamus today to discuss your real estate goals.
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