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  4. Christine Costa, Realtor/Broker Associate

Christine Costa, Realtor/Broker Associate

Kazantzis Real Estate, LLC

Looking to sell your property, buy a new home, or just need some expert real estate advice?

About
Christine Costa is a top-producing Realtor® serving Eastern Connecticut, including Brooklyn CT, Killingly CT, Plainfield CT, Canterbury CT, Woodstock CT, Putnam CT, Thompson CT, and throughout Windham County.
As a full-time, award-winning Realtor® with Kazantzis Real Estate, Christine specializes in strategic home sales and data-driven pricing designed to maximize seller equity and deliver measurable results. Licensed in CT, RI, and MA, Christine combines multi-state buyer reach with deep local expertise. Her marketing approach includes professional photography, floor plan design, virtual staging, targeted digital advertising, and detailed comparative market analysis to ensure properties stand out in today’s competitive market. Sellers value her strategic positioning, professionalism, and performance-driven approach. If you are searching for a top real estate agent in Eastern Connecticut, contact Christine Costa for expert guidance and a results-focused experience.
Highlights *
64
Recent sales
$176K - $725K
Price range
$370K
Median price
6
Years experience

Recent Listings & Sales

Address Sold Date Sold Price Represented
17 Blackwells Lndg
Brooklyn, CT 06234
9/30/2026 $650,000 Buyer
173 Mason Rd
Brooklyn, CT 06234
6/9/2026 $601,000 Buyer
108 Pleasant View Dr
Killingly, CT 06241
5/20/2026 $359,900 Buyer
10 Texas Heights Rd
Plainfield, CT 06374
5/1/2026 $380,000 Seller
27 Martys Way Gales Ferry Ct
Gales Ferry, CT 06335
5/1/2026 $387,000 Buyer

Transaction History *

Seller Deals

Total Deals
19
Total Value
$6,768,440
Median Sale Price
$370,000
Price Range
$176K - $611K

Buyer Deals

Total Deals
45
Total Value
$17,794,000
Median Sale Price
$387,000
Price Range
$205K - $725K

Sales Volume Timeline

Christine Costa, Realtor/Broker Associate’s production volume for the past 3 year period Q4 ’23 Q4 2023 (Oct 1–Dec 31, 2023): $2.8M Q1 ’24 Q1 2024 (Jan 1–Mar 31, 2024): $1.2M Q2 ’24 Q2 2024 (Apr 1–Jun 30, 2024): $4.1M Q3 ’24 Q3 2024 (Jul 1–Sep 30, 2024): $1.1M Q4 ’24 Q4 2024 (Oct 1–Dec 31, 2024): $1.9M Q1 ’25 Q1 2025 (Jan 1–Mar 31, 2025): $1M Q2 ’25 Q2 2025 (Apr 1–Jun 30, 2025): $3.7M Q3 ’25 Q3 2025 (Jul 1–Sep 30, 2025): $3.6M Q4 ’25 Q4 2025 (Oct 1–Dec 31, 2025): $1.8M Q1 ’26 Q1 2026 (Jan 1–Mar 31, 2026): $0 Q2 ’26 Q2 2026 (Apr 1–Jun 30, 2026): $2.7M Q3 ’26 Q3 2026 (Jul 1–Sep 30, 2026): $650K Q4 ’26 Q4 2026 (Oct 1–Oct 31, 2026) — Partial quarter: $0 Q4 2023 Total Sales $2.8M Q1 2024 Total Sales $1.2M Q2 2024 Total Sales $4.1M Q3 2024 Total Sales $1.1M Q4 2024 Total Sales $1.9M Q1 2025 Total Sales $1M Q2 2025 Total Sales $3.7M Q3 2025 Total Sales $3.6M Q4 2025 Total Sales $1.8M Q1 2026 Total Sales $0 Q2 2026 Total Sales $2.7M Q3 2026 Total Sales $650K Q4 2026 Oct 1–Oct 31, 2026 Partial quarter Total Sales $0

Lighter, dashed segments indicate partial quarters. Totals include only dates within the displayed period.

Ratings & Reviews
5.0 (32)

Bonnie
Jun 13, 2026

Moving? Downsizing? Then you need to talk to Adam Gumula. I interviewed four realtors, all pleasant and professional, but the fifth, Adam Gumula (like buying a house, I immediately knew he was the one to sign up with). Adam is easy to talk to and has extensive knowledge of the real estate market, locally and beyond CT. He listens; he quickly returns calls. Whatever your concerns, Adam will have an answer, provided your questions are not about what the future may hold. He’s passionate about his work, eager to take on challenges; he will not let you down or give up once he commits to selling your home. In the most difficult situations, Adam Gumula will see it through to completion. There are many talented agents in the field of real estate, but for me I witnessed a dedicated, motivated and determined young agent willing to give his full attention to my complex real estate needs. I highly recommend Adam Gumula.

Source: Zillow

Tony giambattista
May 19, 2026

Adam Gumula has been an absolute champion throughout the purchase of our dream, forever home. My wife and i had unexpectedly happened upon the home that checked all of the boxes and to sell our existing home and purchasing our new, forever home was daunting at best. Adam was always available, transparent, professional, and when issues arose he worked diligently to right them and push them into favorable outcomes. I have never worked with a better real estate professional. A master of their craft is intimately familliar with the subtle nuance and finesse that is required to bring all the pieces together, and get the job done with efficient elegance. This whole experience has been serendipitous and Adam orchestrated it with that masterful grace. We are so very happy, and we would love to highly recommend him to you, or anyone ready to take the journey to their new home. I promise you will not be disappointed.

Source: Zillow

laurangiambattista
May 19, 2026

Honestly, none of this would have happened without Adam. His zest for success radiates from him and sets himself and his clients right in the direction of their dreams. My husband and I had stumbled across a property we knew could be our forever home. After two failed attempts with other realtors, to sell our own home in time to buy a bigger home in a difficult market, my faith had sadly dwindled. When we contacted Adam, the selling realtor for the home we were interested in, my faith slowly and steadily restored. Adam maneuvered through this entire transaction, purchasing our dream home, and selling our previous home, with upmost professionalism, care, and finesse. He was the right guy for a difficult job and I have full faith that he is the man to walk you through accomplishing your home purchase and sale. Way to go Adam, you are a rockstar and hold a special place in our hearts!!!

Source: Zillow

Kiera Antignani
May 9, 2026

Adam did an outstanding job assisting us with the purchase of our home. His expertise in the market's geographic area was instrumental in determining a competitive purchasing price while considering the future resale value of our home. Adam was very involved in all aspects of the home buying process. He was friendly, responsive, and didn’t bother us with unwanted check ins as to when we were ready to pull the trigger on buying our home.

Source: Zillow

marita frietsch
Apr 30, 2026

As new homebuyers my husband and I were very unsure on the entire process Adam’s patience, knowledge and willingness to go the extra miles ensured a good home buying experience will 100% reccomend. If you want someone who knows everyone and will help you through every step Adam is the man.

Source: Zillow

Professional Info

Brokerage

Kazantzis Real Estate, LLC
8c Day St
Brooklyn, CT 06234

Licensed

Licensed REALTOR®
CT 0794915
RI 0046849

Awards

  • 2023, 2024 & 2025 Agent of the Year County Winner
  • 2022, 2023, 2024 & 2025 Circle of Excellence
  • 2025 Realtor of the Year by Rate my Agent
  • Ranked in the Top 1% of Realtors® in Windham County
  • Ranked in the Top 3.5% of Realtors® in Connecticut

Specialties

  • Age-restricted communities
  • First-time buyers
  • Flipping & rehab
  • Luxury properties
  • Military
  • Relocation

Designations

  • ABR®
  • PSA
  • SRS

Hobbies

  • Animals
  • Family
  • Travel

Top Cities *

Killingly

  • 17 sales past 3 years
  • 45 days on market
  • $370K median price

Brooklyn

  • 14 sales past 3 years
  • 18 days on market
  • $371K median price

Plainfield

  • 4 sales past 3 years
  • 43 days on market
  • $327K median price

*Sales data is calculated based on transaction information available to Agent Pronto at the time of publishing and may not accurately reflect all transactions for a given agent.