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Tamatha Costello

Sales Associate
Coldwell Banker Residential Brokerage

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Being a real estate agent for 20+ years, I have seen & experienced, first hand, all different markets. Honesty, integrity, sincerity & service are my guidelines for success.  My objective is to ease, as much as possible, the complex & often emotional process of buying or selling real estate. Any of my clients would tell you - I love my job and truly care about their needs.


Opportunity knocks with Tammie Costello!


Licensed NJ Real Estate Agent since 1995
Two decades of full time real estate experience

NJAR Circle of Excellence Award
2015, 2014, 2011, 2006-2003, 2001-1998

Distinguished Sales Club

Five Star Real Estate Agent for overall customer satisfaction
Awarded to fewer than 2% of NJ's agents for overall customer satisfaction (5 year recipient)

Life-long Union County resident and long-time Cranford resident
First hand knowledge of the local area's housing market and trends

International Diamond Society 2014
Recognized among the top 11% of 87,000 Coldwell Banker affiliated sales associates worldwide

International Sterling Society 2012
Top 14% of 82,200 Coldwell Banker affiliated sales associates worldwide


Seller Representation

•Pricing and property marketing expert

•Corporate Relocation

•Skilled Negotiator

•Staging & interior design eccentric

•First hand knowledge of communities & school


Buyer Representation

•Accredited Buyer Representative (ABR) | benchmark of excellence in buyer representation

•First hand knowledge of communities & school

•Skilled Negotiator

•Corporate Relocation

•New Construction


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Latest Blog Posts

What an amazing year 2015 was for home sellers, and 2016 promises to be even better. By December of 2015, with 5.26 million sales, we had seen a more...
August 03, 2016
Category: Market Trends
It may seem that homebuyers and sellers don't agree on much, but they share one important concern: that the transaction is successful. This comradery...
June 15, 2016
Category: Selling