Helen MacMahon Real Estate Agent - Sheridan-MacMahon Ltd.

6143 Coon Tree Rd, The Plains, VA For Sale $6,250,000 - co-listed by Helen MacMahon — For Sale $6,250,000 • Co-Listing Agent

Helen MacMahon co-listing agent for 36279 & 36285 E Loudoun St, Round Hill, VA - sold for $4,600,000 — Sold $4,600,000 • Co-Listing Agent

4639 Hopewell Rd, The Plains, VA For Sale $1,450,000 - listed by Helen MacMahon — For Sale $1,450,000

Helen MacMahon buyer's agent for 154 Clay Hill Rd, Boyce, VA - sold for $4,500,000 — Sold $4,500,000

6370 & 6378 John Barton Payne Rd, Marshall, VA For Sale $2,850,000 - co-listed by Helen MacMahon — For Sale $2,850,000 • Co-Listing Agent

Helen MacMahon

Middleburg VA

Sheridan-MacMahon Ltd.

55 Closed Sales

$86.9M Total Value

$225K - $6.3M Price Range

$1.6M Average Price

Prior 5 years

About Helen

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

Years of Experience: 34

Education: Washington College

Transaction History

1 Year
2 Year
5 Year

Seller Deals
Total Deals	10
Total Value	$18,717,500
Average Sale Price	$1,871,750
Price Range	$340K - $4.6M

Buyer Deals
Total Deals	4
Total Value	$9,445,000
Average Sale Price	$2,361,250
Price Range	$350K - $4.5M

1 Year View by Quarter

Seller Deals
Total Deals	16
Total Value	$28,572,500
Average Sale Price	$1,785,781
Price Range	$225K - $5M

Buyer Deals
Total Deals	5
Total Value	$10,645,000
Average Sale Price	$2,129,000
Price Range	$350K - $4.5M

Seller Deals
Total Deals	39
Total Value	$64,752,500
Average Sale Price	$1,660,321
Price Range	$225K - $6.3M

Buyer Deals
Total Deals	16
Total Value	$22,176,000
Average Sale Price	$1,386,000
Price Range	$250K - $4.5M

5 Year View

Helen's Listings and Deals

Helen's Active Listings

$1,450,000
- 1 Bed
- 2 Baths
- 1,462 Sq Ft
4639 Hopewell Rd

The Plains, VA
Hopewell Cottages Attention all naturalists - Unique and very special offering – two cottages and two large ponds together on 10 acres just east of The Plains – ultimate charm and beautiful setting. Original cottage has 1 bedroom, 2 full baths, gourmet kitchen, fireplace, stone walls and multi leveled terraces overlooking the spring fed ponds. 2nd cottage across the pond enjoys tremendous privacy

Helen MacMahon Sheridan-MacMahon Ltd.

$7,900,000
- 5 Beds
- 7 Baths
- 11,814 Sq Ft
2547 Halfway Rd

The Plains, VA
FIDELIO - 61 acres Experience unparalleled craftsmanship and old-world sophistication in this extraordinary European-inspired estate, where reclaimed architectural antiquities and museum-quality finishes create a residence of rare distinction. Limestone floors, hand-painted coffered ceilings, and exquisite mahogany doors and windows define the home’s refined interior. The main residence offers

Helen MacMahon Sheridan-MacMahon Ltd.

Co-Listing Agent

$6,250,000
- 5 Beds
- 9 Baths
- 7,130 Sq Ft
6143 Coon Tree Rd

The Plains, VA
The Tannery has evolved gracefully over more than two centuries, each generation adding thoughtfully whileThe Tannery has evolved gracefully over more than two centuries, each generation adding thoughtfully while preserving the integrity of what came before. Originally dating to the late 1700s and thoughtfully expanded, The Tannery is an extraordinary country estate where authenticity,

Helen MacMahon Sheridan-MacMahon Ltd.

Co-Listing Agent

$2,850,000
- 3 Beds
- 2.5 Baths
- 2,540 Sq Ft
6370 & 6378 John Barton Payne Rd

Marshall, VA
“Willow Run” is a truly enchanting country estate, steeped in history and timeless elegance. The original residence, dating to circa 1812 and masterfully constructed of stone and stucco by Mason Hirst, has been thoughtfully expanded over the years—most notably in 1880 and 1970—and exquisitely updated by its current stewards to blend historic charm with modern refinement.Inside, the home

Helen MacMahon Sheridan-MacMahon Ltd.

Recently Sold

$340,000

Sold Mar 11, 2026
- 3 Beds
- 1.5 Baths
- 1,332 Sq Ft
10177 Irongate Way

Manassas, VA
- 11% Below List
- 55 Days On Market
- $255/SF
- Current Est. Value $342K
Helen MacMahon Sheridan-MacMahon Ltd.

$610,000

Sold Jan 29, 2026
- 3 Beds
- 3 Baths
- 2,868 Sq Ft
5551 Obannon Rd

The Plains, VA
- 3% Above List
- 2 Days On Market
- $213/SF
- Current Est. Value $636K
Helen MacMahon Sheridan-MacMahon Ltd.

$495,000

Sold Dec 19, 2025
- Land
- 18.31 Acres Lot
0 O'Bannon Rd

Unit VAFQ2019616

The Plains, VA
- 1 Day On Market
Helen MacMahon Sheridan-MacMahon Ltd.

$2,600,000

Sold Dec 1, 2025
- 5 Beds
- 4.5 Baths
- 4,821 Sq Ft
34679 Atoka Chase Ln

Middleburg, VA
- 10 Days On Market
- $539/SF
- Current Est. Value $3M
Helen MacMahon Sheridan-MacMahon Ltd.

$1,300,000

Sold Nov 17, 2025
- 3 Beds
- 3 Baths
- 3,485 Sq Ft
38684 Mount Gilead Rd

Leesburg, VA
- 189 Days On Market
- $373/SF
- Current Est. Value $1M
Helen MacMahon Sheridan-MacMahon Ltd.

$815,000

Sold Oct 20, 2025
- 3 Beds
- 3 Baths
- 2,076 Sq Ft
38103 Homestead Farm Ln

The Plains, VA
- 4 Days On Market
- $393/SF
- Current Est. Value $843K
Helen MacMahon Sheridan-MacMahon Ltd.

$3,350,000

Sold Oct 3, 2025
- Land
- 162.60 Acres Lot
0 Atoka Rd

Unit VAFQ2014324

Marshall, VA
- 292 Days On Market
Helen MacMahon Sheridan-MacMahon Ltd.

$1,625,000

Sold Aug 28, 2025
- 3 Beds
- 2.5 Baths
- 1,892 Sq Ft
3671 Halfway Rd

The Plains, VA
- 171 Days On Market
- $859/SF
- Current Est. Value $2M
Helen MacMahon Sheridan-MacMahon Ltd.

$2,982,500

Sold Jul 11, 2025
- 5 Beds
- 6 Baths
- 5,184 Sq Ft
6437 Blantyre Rd

Warrenton, VA
- 22 Days On Market
- $575/SF
- Current Est. Value $3M
Helen MacMahon Sheridan-MacMahon Ltd.

Awards and Designations

NAR - National Association of Realtors

Agent License: Virginia 0225028022

Helen MacMahon

(540) 253-1249

Sheridan-MacMahon Ltd.

(540) 253-1249

Homes for Sale by City

Helen MacMahon

About Helen

Transaction History

Seller Deals

Buyer Deals

Production Over Time

1 Year View by Quarter

Seller Deals

Buyer Deals

Seller Deals

Buyer Deals

Production Over Time

5 Year View

Helen's Listings and Deals

Helen's Active Listings

Recently Sold

Awards and Designations