Dylan Costello Real Estate Agent - Coldwell Banker Realty - Boston

11 Tappan Way, Lynnfield, MA For Sale $2,195,000 - co-listed by Dylan Costello — For Sale $2,195,000 • Co-Listing Agent

Dylan Costello co-listing agent for 3 Russell Rd, Lynnfield, MA - sold for $1,900,000 — Sold $1,900,000 • Co-Listing Agent

267 Old Colony Ave Unit 308, Boston, MA Pending $999,000 - co-listed by Dylan Costello — Pending $999,000 • Co-Listing Agent

Dylan Costello buyer's agent for 83 Greenwood St, Marlborough, MA - sold for $615,000 — Sold $615,000

267 Old Colony Ave Unit 510, Boston, MA For Sale $799,000 - co-listed by Dylan Costello — For Sale $799,000 • Co-Listing Agent

Dylan Costello

Boston MA

Coldwell Banker Realty - Boston

64 Closed Sales

$66.2M Total Value

$615K - $2.1M Price Range

$1M Average Price

Prior 5 years

About Dylan

Home Types: MultiFamily, Lot/Land, Condo, House, Townhouse

Years of Experience: 13

Transaction History

1 Year
2 Year
5 Year

Seller Deals
Total Deals	14
Total Value	$14,478,000
Average Sale Price	$1,034,143
Price Range	$555K - $2.1M

Buyer Deals
Total Deals	4
Total Value	$3,295,000
Average Sale Price	$823,750
Price Range	$615K - $1.1M

1 Year View by Quarter

Seller Deals
Total Deals	27
Total Value	$26,682,214
Average Sale Price	$988,230
Price Range	$555K - $2.1M

Buyer Deals
Total Deals	11
Total Value	$10,147,500
Average Sale Price	$922,500
Price Range	$488K - $1.9M

2 Year View by Quarter

Seller Deals
Total Deals	34
Total Value	$33,954,214
Average Sale Price	$998,653
Price Range	$555K - $2.1M

Buyer Deals
Total Deals	30
Total Value	$32,289,900
Average Sale Price	$1,076,330
Price Range	$480K - $2.1M

5 Year View

Neighborhoods Dylan is Experienced In

Dylan's Active Listings

Co-Listing Agent

$2,195,000
- 4 Beds
- 4 Baths
- 5,148 Sq Ft
11 Tappan Way

Lynnfield, MA
Set at the end of a quiet cul-de-sac, 11 Tappan Way is a 2007-built Colonial where thoughtful design meets everyday ease. A picture-perfect facade opens into sun-filled rooms and a layout that flows effortlessly from one space to the next. A private home office anchors quiet workdays, while a newly designed lower-level pub sets the stage for long evenings with friends. Upstairs, the primary suite

Dylan Costello Serhant

Co-Listing Agent

$799,000
- 1 Bed
- 1 Bath
- 791 Sq Ft
267 Old Colony Ave

Unit 510

Boston, MA
ONE BED PLUS DEN! Trimount Place is South Boston’s top luxury, amenity rich development—Designed to Inspire. Built to Last. Thoughtfully crafted with 5” white oak, Calacatta countertops, timeless, custom shaker cabinetry—these residences pair style with function. Enjoy sleek appliances, ceramic backsplash, and spa-like bathrooms with porcelain walls and Carrara marble floors. Amenities include 2

Dylan Costello Serhant

Co-Listing Agent

$849,000
- 2 Beds
- 2 Baths
- 922 Sq Ft
267 Old Colony Ave

Unit 311

Boston, MA
OVER 60% SOLD—RATE BUY-DOWN INCENTIVES! Trimount Place is South Boston’s top luxury, amenity rich development—Designed to Inspire. Built to Last. Thoughtfully crafted with 5” white oak, Calacatta countertops, timeless, custom shaker cabinetry—these residences pair style with function. Enjoy sleek appliances, ceramic backsplash, and spa-like bathrooms with porcelain walls and Carrara marble

Dylan Costello Serhant

Co-Listing Agent

$1,199,000
- 3 Beds
- 2 Baths
- 1,225 Sq Ft
267 Old Colony Ave

Unit 310

Boston, MA
Welcome to Trimount Place—South Boston’s latest luxury development, designed to inspire and built to last. Set in one of the city’s fastest-growing pockets, you’re right where Southie’s character meets Seaport momentum. Each residence is thoughtfully finished with 5” white oak floors, Calacatta Colorado quartz countertops, and custom shaker cabinetry in a crisp mix of white and light grey.

Dylan Costello Serhant

Co-Listing Agent

$1,450,000
- 2 Beds
- 2 Baths
- 1,328 Sq Ft
267 Old Colony Ave

Unit 601

Boston, MA
Welcome to Trimount Place—South Boston’s latest luxury development, designed to inspire and built to last. Set in one of the city’s fastest-growing pockets, you’re right where Southie’s character meets Seaport momentum. Each residence is thoughtfully finished with 5” white oak floors, Calacatta Colorado quartz countertops, and custom shaker cabinetry in a crisp mix of white and light grey.

Dylan Costello Serhant

Co-Listing Agent

$999,000
- 2 Beds
- 2 Baths
- 1,072 Sq Ft
267 Old Colony Ave

Unit 308

Boston, MA
Welcome to Trimount Place, South Boston’s latest luxury development, designed to inspire and built to last. Set in one of the city’s fastest-growing pockets, you’re right where Southie’s character meets Seaport momentum. Each residence is thoughtfully finished with 5” white oak floors, Calacatta Colorado quartz countertops, and custom shaker cabinetry in a crisp mix of white and light grey.

Dylan Costello Serhant

Co-Listing Agent

$4,850,000
- 5 Beds
- 6.5 Baths
- 7,962 Sq Ft
9 Tuttle Ln

Lynnfield, MA
Tucked at the end of a private cul-de-sac on 1.79 acres, 9 Tuttle Lane was built for the buyer who values privacy as much as they value quality. Meticulously crafted by Orr Homes, every detail was executed without compromise — herringbone white oak floors, 10-foot ceilings, and a chef's kitchen outfitted with Sub-Zero, Wolf & Cove appliances, a large double island, pot filler, wine chiller, wet

Dylan Costello Serhant

Recently Sold

$949,000

Sold Mar 4, 2026
- 3 Beds
- 3 Baths
- 1,434 Sq Ft
9 Sydney St

Unit 4

Dorchester, MA
- $662/SF
- 14 Days On Market
Dylan Costello Serhant

$1,150,000

Sold Jan 16, 2026
- 3 Beds
- 3 Baths
- 1,476 Sq Ft
803 E 5th St

Unit 1

Boston, MA
- 8% Below List
- $779/SF
- 22 Days On Market
Dylan Costello Serhant

$555,000

Sold Dec 22, 2025
- 1 Bed
- 1.5 Baths
- 787 Sq Ft
9 Sydney St

Unit 1

Dorchester, MA
- 7% Below List
- $705/SF
- 18 Days On Market
Dylan Costello Serhant

$905,000

Sold Oct 31, 2025
- 2 Beds
- 2 Baths
- 995 Sq Ft
267 Old Colony Ave

Unit 302

Boston, MA
- 2% Below List
- $910/SF
- 64 Days On Market
Dylan Costello Coldwell Banker Realty - Boston

$749,000

Sold Oct 14, 2025
- 2 Beds
- 2 Baths
- 956 Sq Ft
9 Sydney St

Unit 2

Dorchester, MA
- $783/SF
- 55 Days On Market
Dylan Costello Coldwell Banker Realty - Boston

$945,000

Sold Aug 29, 2025
- 2 Beds
- 2 Baths
- 992 Sq Ft
267 Old Colony Ave

Unit 406

Boston, MA
- 5% Below List
- $953/SF
- 4 Days On Market
Dylan Costello Coldwell Banker Realty - Boston

$1,135,000

Sold Aug 29, 2025
- 3 Beds
- 2 Baths
- 1,225 Sq Ft
267 Old Colony Ave

Unit 205

Boston, MA
- 3% Below List
- $927/SF
- 77 Days On Market
Dylan Costello Coldwell Banker Realty - Boston

$2,100,000

Sold Aug 22, 2025
- 4 Beds
- 4.5 Baths
- 3,025 Sq Ft
832 E 3rd St

Unit A

Boston, MA
- 9% Below List
- $694/SF
- 49 Days On Market
Dylan Costello Coldwell Banker Realty - Boston

$1,010,000

Sold Aug 8, 2025
- 2 Beds
- 2 Baths
- 938 Sq Ft
267 Old Colony Ave

Unit 507

Boston, MA
- 4% Below List
- $1,077/SF
- 61 Days On Market
Dylan Costello Coldwell Banker Realty - Boston

Other Experience

First Time Homebuyers, Investments, Luxury Homes, New Construction

Agent License: Massachusetts 449596440

Dylan Costello

(857) 776-0921

Homes for Sale by City

Dylan Costello

About Dylan

Transaction History

Seller Deals

Buyer Deals

Production Over Time

1 Year View by Quarter

Seller Deals

Buyer Deals

Production Over Time

2 Year View by Quarter

Seller Deals

Buyer Deals

Production Over Time

5 Year View

Neighborhoods Dylan is Experienced In

Dylan's Listings and Deals

Dylan's Active Listings

Recently Sold

Other Experience