
Get to know Siobhan Costello Weber
Realtor®
Siobhan strives to develop lasting trust and open communication in all her personal and professional relationships. After 20 years dedicated to corporate Marketing, she has the financial aptitude, business acumen, and tenacity to negotiate competitive deals and keep on top of market trends. She's fueled by a passion for real estate and community outreach - the combination of which led her to join the Castinetti Group. Over the last 5 years, Siobh...
Siobhan Costello Weber's listings & sales (125)
For Sale
For Rent (1)
Address | Bed/Bath | Listing price |
---|---|---|
![]() 582 Main St #1 Shrewsbury, MA 01545
| 1 Bed, 1 Bath | $2,150/mo |
Sold (124)
Address | Sold date | Closing price | Represented | Flag Sale |
---|---|---|---|---|
7/18/2025 | $685,000 | Buyer | ||
7/8/2025 | $790,000 | Seller | ||
7/7/2025 | $630,000 | Seller | ||
7/2/2025 | $1,125,000 | Buyer | ||
6/30/2025 | $320,000 | Seller |
Siobhan Costello Weber's reviews (28)
Write a review- Highly likely to recommend||5.05.0
7/30/2025 - Anna Fursoff
Bought and sold a Single Family home in 2025 in Westborough, MA.Local knowledgeProcess expertiseResponsivenessNegotiation skillsMy husband worked with Siobhan previously to buy a home many years ago, and when we were ready for a new chapter her name immediately came to mind. Once I met her I quickly realized why: she is the best in the business. Firstly she is the kind, carin... - Highly likely to recommend||5.05.0
7/1/2025 - heatherfiori6
Sold a Single Family home in 2025 in Worcester, MA.Local knowledgeProcess expertiseResponsivenessNegotiation skillsWe recently sold our home with Siobhan and we couldn’t be more grateful for her dedication and professionalism. Selling our house was far from easy — we faced two offers falling through before we finally closed, and the process felt like an emotional... - Highly likely to recommend||5.05.0
10/9/2024 - hana tauras
Bought a Single Family home in 2024 in Sutton, MA.Local knowledgeProcess expertiseResponsivenessNegotiation skillsMy husband and I had the pleasure of working with Siobhan and we couldn’t have asked for a better experience. She is not only highly knowledgeable but is also incredibly approachable and responsive throughout the entire process. Siobhan guided us wit... - Highly likely to recommend||5.05.0
9/12/2024 - Carla Goyette
Bought a Single Family home in 2019 in Auburn, MA.Local knowledgeProcess expertiseResponsivenessNegotiation skillsSiobhan was a pleasure to work with. I would recommend her in a heartbeat. She was very knowledgeable and friendly and just so easy to talk to about what we were looking for. She never tried to push us into anything just for a sale. She really was de... - Highly likely to recommend||5.05.0
9/9/2024 - katie84032
Bought a home in 2021.Local knowledgeProcess expertiseResponsivenessNegotiation skillsWe were incredibly lucky to find Siobhan at an open house four years ago. Her friendliness, deep market knowledge, and endless patience made our home-buying process both enjoyable and successful. We closed on our home in 2021. Even now, she’s invalua...