Dylan Costello Real Estate Agent - Coldwell Banker Realty - Boston

440 Granite Ave Unit 205, Milton, MA For Sale $949,000 - co-listed by Dylan Costello — For Sale $949,000 • Co-Listing Agent

Dylan Costello co-listing agent for 267 Old Colony Ave Unit 503, Boston, MA - sold for $890,000 — Sold $890,000 • Co-Listing Agent

440 Granite Ave Unit 304, Milton, MA For Sale $1,225,000 - co-listed by Dylan Costello — For Sale $1,225,000 • 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 206, Boston, MA For Sale $795,000 - co-listed by Dylan Costello — For Sale $795,000 • Co-Listing Agent

Dylan Costello

Boston MA

Coldwell Banker Realty - Boston

64 Closed Sales

$69M Total Value

$479.9K - $4.6M Price Range

$1.1M 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	17
Total Value	$20,953,000
Average Sale Price	$1,232,529
Price Range	$555K - $4.6M

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	30
Total Value	$33,157,214
Average Sale Price	$1,105,240
Price Range	$555K - $4.6M

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	37
Total Value	$40,429,214
Average Sale Price	$1,092,681
Price Range	$555K - $4.6M

Buyer Deals
Total Deals	27
Total Value	$28,609,900
Average Sale Price	$1,059,626
Price Range	$480K - $2.1M

5 Year View

Areas Dylan is Experienced In

Dylan's Listings and Deals

Dylan's Recent Active Listings

Co-Listing Agent

$949,000
- 2 Beds
- 2 Baths
- 1,076 Sq Ft
440 Granite Ave

Unit 205

Milton, MA
At The Granite, this thoughtfully designed single level residence offers the comfort of a spacious home with the ease of condominium living. An open kitchen, dining and living area creates a bright, welcoming space for everyday living and entertaining, with large windows and warm white oak flooring throughout. The primary suite features a private full bath, while a second bedroom and additional

Dylan Costello Serhant

Co-Listing Agent

$1,225,000
- 2 Beds
- 2 Baths
- 1,266 Sq Ft
440 Granite Ave

Unit 304

Milton, MA
At The Granite, Residence 304 offers thoughtfully designed single-level living with an open kitchen, dining and living area that flows naturally to a private balcony—an inviting place to enjoy morning coffee and the sunrise. Five-inch white oak flooring runs throughout the main living spaces, while the kitchen features Metropolitan cabinetry, Acadia quartz with a waterfall edge, and a Thermador

Dylan Costello Serhant

Co-Listing Agent

$795,000
- 2 Beds
- 2 Baths
- 987 Sq Ft
267 Old Colony Ave

Unit 206

Boston, MA
This thoughtfully designed residence at Trimount Place offers 2 bedrooms, 2 bathrooms, a private 302-square-foot deck, and deeded garage parking within one of South Boston’s newest condominium buildings. Inside, every finish has been selected with intention from 5" white oak flooring and Calacatta Colorado quartz countertops to custom shaker cabinetry, and Bosch appliances.This elevator building

Dylan Costello Serhant

Co-Listing Agent

$1,249,000
- 2 Beds
- 2 Baths
- 1,328 Sq Ft
267 Old Colony Ave

Unit 501

Boston, MA
Be the first to live in this spacious 2 bedroom 2 bathroom offers a 778 SQUARE FOOT PRIVATE DECK overlooking Boston’s city scape. Inside, every finish has been selected with intention from 5" white oak flooring and Calacatta Colorado quartz countertops to custom shaker cabinetry, and Bosch appliances.This elevator building brings everyday ease with DEEDED GARAGE PARKING.Signature Amenities: The

Dylan Costello Serhant

Co-Listing Agent

$1,099,000
- 2 Beds
- 2 Baths
- 1,120 Sq Ft
267 Old Colony Ave

Unit 404

Boston, MA
Welcome to Residence #404 at Trimount Place, a one of a kind home distinguished by its curved design with TEN windows bringing abundant natural light and panoramic city views. Thoughtfully crafted with 5" white oak flooring, Calacatta quartz countertops, timeless custom shaker cabinetry, Bosch appliances, and designer finishes, every detail has been selected to deliver effortless sophistication.

Dylan Costello Serhant

Co-Listing Agent

$1,495,000
- 2 Beds
- 2 Baths
- 1,127 Sq Ft
267 Old Colony Ave

Unit 606

Boston, MA
Some homes offer beautiful finishes. Penthouse #606 offers an experience. Anchored by a PRIVATE ROOF DECK and accompanied by TWO DEEDED PARKING SPACES, this top floor residence delivers a level of privacy and convenience rarely available in South Boston. Inside, carefully curated finishes including 5" white oak flooring, Calacatta Colorado quartz countertops, custom cabinetry, Bosch appliances,

Dylan Costello Serhant

Co-Listing Agent

$749,000
- 2 Beds
- 1 Bath
- 747 Sq Ft
267 Old Colony Ave

Unit 602

Boston, MA
Luxury should adapt to the way you live. Residence #602 at Trimount Place is a beautifully designed junior 2 bedroom that delivers the versatility today's buyers are looking for, offering the perfect space for a home office, guest suite, or additional bedroom. Every finish has been selected with intention from 5" white oak flooring and Calacatta Colorado quartz countertops to custom shaker

Dylan Costello Serhant

Co-Listing Agent

$1,995,995
- 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

$599,000

Pending
- 1 Bed
- 1 Bath
- 678 Sq Ft
267 Old Colony Ave

Unit 511

Boston, MA
Inside this bright and sunny 1 bedroom 1 bath residence, every finish has been selected with intention from 5" white oak flooring and Calacatta Colorado quartz countertops to custom shaker cabinetry, and Bosch appliances. Trimount Place is South Boston’s top luxury, amenity rich development designed to inspire and built to last. Signature Amenities: The roofdeck has the best waterfront view over

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
- 14 Days On Market
- $662/SF
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
- 22 Days On Market
- $779/SF
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
- 18 Days On Market
- $705/SF
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
- 64 Days On Market
- $910/SF
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
- 55 Days On Market
- $783/SF
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
- 4 Days On Market
- $953/SF
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
- 77 Days On Market
- $927/SF
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
- 49 Days On Market
- $694/SF
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
- 61 Days On Market
- $1,077/SF
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

Nearby Homes

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

Areas Dylan is Experienced In

Dylan's Listings and Deals

Dylan's Recent Active Listings

Recently Sold

Other Experience