Erin Roper Real Estate Agent - The Collaborative Companies

55 Lagrange St Unit 905, Boston, MA For Sale $499,000 - listed by Erin Roper — For Sale $499,000

Erin Roper listing and buyer's agent for 55 Lagrange St Unit 808, Boston, MA - sold for $749,000 — Sold $749,000

55 Lagrange St Unit 1901, Boston, MA For Sale $999,000 - listed by Erin Roper — For Sale $999,000

Erin Roper buyer's agent for 874 E 6th St Unit 4, Boston, MA - sold for $1,599,000 — Sold $1,599,000

55 Lagrange St Unit 1003, Boston, MA For Sale $659,000 - listed by Erin Roper — For Sale $659,000

Erin Roper

Boston MA

The Collaborative Companies

14 Closed Sales

$15.8M Total Value

$639K - $2.5M Price Range

$1.1M Average Price

Prior 5 years

About Erin

Home Types: Condo, House

Transaction History

1 Year
2 Year
5 Year

Seller Deals
Total Deals	11
Total Value	$12,601,000
Average Sale Price	$1,145,545
Price Range	$518K - $2.5M

Seller Deals
Total Deals	11
Total Value	$12,601,000
Average Sale Price	$1,145,545
Price Range	$518K - $2.5M

Buyer Deals
Total Deals	1
Total Value	$1,599,000
Average Sale Price	$1,599,000

Seller Deals
Total Deals	12
Total Value	$13,471,000
Average Sale Price	$1,122,583
Price Range	$518K - $2.5M

Buyer Deals
Total Deals	2
Total Value	$2,324,000
Average Sale Price	$1,162,000
Price Range	$725K - $1.6M

Areas Erin is Experienced In

Erin's Listings and Deals

Erin's Active Listings

$499,000
- 1 Bath
- 456 Sq Ft
55 Lagrange St

Unit 905

Boston, MA
Last available at this price! Best priced studio at The Parker + Offering an exclusive 3.25% Mortgage - Be the first to call this thoughtfully designed studio home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, just moments from Boston Common, the Public Garden, MBTA lines, Downtown, Back Bay, and more. Inside residence 905 enjoy an

Erin Roper The Collaborative Companies

$999,000
- 2 Beds
- 2 Baths
- 1,119 Sq Ft
55 Lagrange St

Unit 1901

Boston, MA
Price Improvement! Best priced two bed at The Parker! Be the first to call this thoughtfully designed 2 bed 2 bath home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, just moments from Boston Common, the Public Garden, MBTA lines, Downtown, Back Bay, and more. Inside residence 1901, corner floor-to-ceiling windows fill the space with

Erin Roper The Collaborative Companies

$659,000
- 1 Bed
- 1 Bath
- 511 Sq Ft
55 Lagrange St

Unit 1003

Boston, MA
The Parker's best priced one bed - Offering an exclusive 3.25% Mortgage - Be the first to call this thoughtfully designed 1 bed 1 bath home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, just moments from Boston Common, the Public Garden, MBTA lines, Downtown, Back Bay, and more. Inside residence 1003, enjoy floor-to-ceiling windows and

Erin Roper The Collaborative Companies

$1,199,000
- 2 Beds
- 2 Baths
- 1,214 Sq Ft
55 Lagrange St

Unit 1705

Boston, MA
Offering an exclusive 3.25% Mortgage - Be the first to call this thoughtfully designed 2 bed 2 bath home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, just moments from Boston Common, the Public Garden, MBTA lines, Downtown, Back Bay, and more. Inside residence 1705, corner floor-to-ceiling windows fill the space with natural light and

Erin Roper The Collaborative Companies

$1,699,000
- 2 Beds
- 2 Baths
- 1,218 Sq Ft
55 Lagrange St

Unit PH21C

Boston, MA
Only TWO of this floor plan left! Offering an exclusive 3.25% Mortgage - Be the first to call this thoughtfully designed two bed home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, moments from Boston Common, Public Garden, MBTA lines, Downtown, Back Bay, & more. Inside residence PH21C enjoy floor-to-ceiling windows with sweeping city

Erin Roper The Collaborative Companies

$719,000
- 1 Bed
- 1 Bath
- 570 Sq Ft
55 Lagrange St

Unit 1202

Boston, MA
Highly desirable and rarely available floor plan + Offering an exclusive 3.25% Mortgage - Be the first to call this thoughtfully designed one bed home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, just moments from Boston Common, the Public Garden, MBTA lines, Downtown, Back Bay, and more. Inside residence 1202 enjoy floor-to-ceiling

Erin Roper The Collaborative Companies

$499,000

Pending
- 1 Bath
- 456 Sq Ft
55 Lagrange St

Unit 1005

Boston, MA
Best priced studio at The Parker + Offering an exclusive 3.25% Mortgage - Be the first to call this thoughtfully designed studio home! One of Boston’s premier new luxury residences, The Parker is perfectly positioned in the Theater District, just moments from Boston Common, the Public Garden, MBTA lines, Downtown, Back Bay, and more. Inside residence 1005 enjoy an efficient floor plan with

Erin Roper The Collaborative Companies

Recently Sold

$745,000

Sold Mar 2, 2026
- 1 Bed
- 1 Bath
- 570 Sq Ft
55 Lagrange St

Unit 1402

Boston, MA
- 1 Day On Market
- $1,307/SF
Erin Roper The Collaborative Companies

$749,000

Sold Feb 25, 2026
- 1 Bed
- 1 Bath
- 583 Sq Ft
55 Lagrange St

Unit 808

Boston, MA
- 23 Days On Market
- $1,285/SF
Erin Roper The Collaborative Companies

$1,004,000

Sold Feb 25, 2026
- 2 Beds
- 2 Baths
- 1,041 Sq Ft
55 Lagrange St

Unit 1404

Boston, MA
- 1% Above List
- 91 Days On Market
- $964/SF
Erin Roper The Collaborative Companies

$1,279,000

Sold Feb 20, 2026
- 2 Beds
- 2 Baths
- 1,218 Sq Ft
55 Lagrange St

Unit 1703

Boston, MA
- 70 Days On Market
- $1,050/SF
Erin Roper The Collaborative Companies

$1,399,000

Sold Jan 20, 2026
- 2 Beds
- 2 Baths
- 1,240 Sq Ft
55 Lagrange St

Unit 1802

Boston, MA
- 1 Day On Market
- $1,128/SF
Erin Roper The Collaborative Companies

$1,050,000

Sold Dec 19, 2025
- 2 Beds
- 2 Baths
- 1,041 Sq Ft
55 Lagrange St

Unit 1504

Boston, MA
- 4% Below List
- 68 Days On Market
- $1,009/SF
Erin Roper The Collaborative Companies

$2,049,000

Sold Dec 18, 2025
- 2 Beds
- 2 Baths
- 1,268 Sq Ft
55 Lagrange St

Unit 2004

Boston, MA
- 1 Day On Market
- $1,616/SF
Erin Roper The Collaborative Companies

$669,000

Sold Dec 15, 2025
- 1 Bed
- 1 Bath
- 570 Sq Ft
55 Lagrange St

Unit 1102

Boston, MA
- 1 Day On Market
- $1,174/SF
Erin Roper The Collaborative Companies

$639,000

Sold Oct 23, 2025
- 1 Bed
- 1 Bath
- 570 Sq Ft
55 Lagrange St

Unit 902

Boston, MA
- 1 Day On Market
- $1,121/SF
Erin Roper The Collaborative Companies

Erin Roper

(207) 387-9336

The Collaborative Companies

(207) 387-9336

Nearby Homes

Erin Roper

About Erin

Transaction History

Seller Deals

Seller Deals

Buyer Deals

Seller Deals

Buyer Deals

Areas Erin is Experienced In

Erin's Listings and Deals

Erin's Active Listings

Recently Sold