Claudia + Courtney Collective's Profile Photo

Claudia + Courtney Collective

cccollective@compass.com
M: 202-330-7863
About Claudia + Courtney Collective
Claudia Grinius and Courtney Sieloff are trusted real estate advisors serving Washington, DC, Maryland, and Virginia. They combine precise pricing, strong instincts, and a highly personalized approach to help clients make confident decisions. Because in this market, it is both money and vibes and the details matter.

They approach their work as advisors first, guiding and educating clients through decisions that are both financially significant and deeply personal. Their process is grounded in a clear understanding of pricing, timing, and market dynamics, balanced with a thoughtful perspective on how a home presents and how buyers will respond.

A defining strength of the Collective is pricing. Claudia is widely known for her ability to price homes with precision, combining deep local knowledge with real-time data and a nuanced understanding of buyer behavior. That clarity at the outset creates stronger positioning, more meaningful interest, and ultimately better results.

Together, Claudia and Courtney bring a complementary mix of market insight, strategy, and execution. Their work is highly collaborative and intentionally structured with no single points of failure, ensuring their clients benefit from consistent attention, responsiveness, and alignment from start to finish.
They are known for their personable, direct approach and for paying close attention to the details that shape outcomes. From preparation to negotiation, each step is handled with care and intention.
They work with buyers, sellers, renters, and investors, and have a particular appreciation for guiding first-time buyers through the process. Their goal is to ensure every client feels informed, supported, and confident in the decisions they make.

Because in the end, this is about more than a transaction. It is about getting the details right, understanding both the numbers and the nuance, and helping clients move forward with clarity and confidence.

Team Agents

Claudia + Courtney Collective’s Listings

$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
$1,475,000 | 1635 Madison Street Northwest, Washington, DC 20011
1/26
Compass Coming Soon

$1,475,000

3
Bedrooms
Unavailable
Square Feet
0.08
Acres

1635 Madison Street Northwest, Washington, DC 20011

a view of a white house with a yard plants and large tree
a front view of a house with garden
a living room with lots of furniture and kitchen view
a view of kitchen with refrigerator dining table and chairs
a large kitchen with stainless steel appliances a sink and cabinets
a large white kitchen with white cabinets and stainless steel appliances
a large kitchen with a table and chairs
a dining room with furniture a window and a chandelier
a living room with furniture and a window
a living room with furniture and a large window
a kitchen with a sink a window and cabinets
a living room with furniture a fireplace and a flat screen tv
a living room with furniture and a window
a bedroom with a bed and a window
a bedroom with bed and window
a bathroom with a sink toilet vanity and shower
a living room with furniture and floor to ceiling windows
a living room with furniture and wooden floor
a bedroom with a large bed and a chandelier
a spacious bedroom with a large bed and a window
a view of storage and utility room
a bathroom with a double vanity sink a toilet and a mirror
a bathroom with a toilet sink and mirror
a bathroom with a bathtub and shower
a bathroom with a double vanity sink and a mirror
wooden floor in an empty room with a window
a view of empty room with wooden floor and fan
wooden floor in an empty room
a bathroom with a sink toilet and shower
an empty room with white walls and refrigerator
a front view of a house with a yard
front view of house with a yard
a view of a house with a yard
a view of a wooden deck with a bench
a view of a field of grass and trees
a view of outdoor space and deck
an aerial view of a house with a yard
a view of outdoor space and yard
unknown
1/39
Listed By CompassPending

$1,075,000

5
Bedrooms
2,920
Square Feet
0.59
Acres

12140 Folkstone Drive, Herndon, VA 20171

$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
$510,000 | 22661 Settlers Trail Terrace, Brambleton, VA 20148
1/28
Listed By Compass

$510,000

3
Bedrooms
1,740
Square Feet
Unavailable
Acres

22661 Settlers Trail Terrace, Brambleton, VA 20148

$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
$487,000 | 817 West Tantallon Drive, Fort Washington, MD 20744
1/43
Listed By CompassActive Under Contract

$487,000

4
Bedrooms
2,204
Square Feet
0.37
Acres

817 West Tantallon Drive, Fort Washington, MD 20744

Claudia + Courtney Collective’s Transactions

Past Sales
$2,425,000 | 4014 Linnean Avenue Northwest, Washington, DC 20008

$2,425,000

4
Bedrooms
4,044
Square Feet
0.19
Acres

4014 Linnean Avenue Northwest, Washington, DC 20008

$1,800,000 | 10 Huntersworth Court, Owings Mills, MD 21117

$1,800,000

5
Bedrooms
15,193
Square Feet
3.22
Acres

10 Huntersworth Court, Owings Mills, MD 21117

a living room with furniture and a table

$1,800,000

5
Bedrooms
6,500
Square Feet
0.21
Acres

3015 Oregon Knolls Drive Northwest, Washington, DC 20015

$1,670,000 | 4406 35th Street Northwest, Washington, DC 20008

$1,670,000

5
Bedrooms
2,775
Square Feet
0.09
Acres

4406 35th Street Northwest, Washington, DC 20008

$1,655,000 | 3005 Oregon Knolls Drive Northwest, Washington, DC 20015

$1,655,000

3
Bedrooms
3,424
Square Feet
0.18
Acres

3005 Oregon Knolls Drive Northwest, Washington, DC 20015

$1,540,000 | 3029 Oregon Knolls Drive Northwest, Washington, DC 20015

$1,540,000

3
Bedrooms
4,122
Square Feet
0.18
Acres

3029 Oregon Knolls Drive Northwest, Washington, DC 20015

$1,500,000 | 1211 Clifton Street Northwest, Washington, DC 20009

$1,500,000

6
Bedrooms
3,347
Square Feet
0.05
Acres

1211 Clifton Street Northwest, Washington, DC 20009

$1,500,000 | 25 S Street Northwest, Washington, DC 20001

$1,500,000

4
Bedrooms
2,630
Square Feet
0.03
Acres

25 S Street Northwest, Washington, DC 20001

$1,450,000 | 8 Valleys Crest Court, Owings Mills, MD 21117

$1,450,000

5
Bedrooms
8,562
Square Feet
1.24
Acres

8 Valleys Crest Court, Owings Mills, MD 21117

a front view of a house with garden

$1,352,500

3
Bedrooms
1,973
Square Feet
0.04
Acres

3743 W Street Northwest, Washington, DC 20007

$1,270,000 | 3229 Hunting Tweed Drive, Owings Mills, MD 21117

$1,270,000

5
Bedrooms
10,316
Square Feet
1.84
Acres

3229 Hunting Tweed Drive, Owings Mills, MD 21117

$1,270,000 | 1112 Euclid Street Northwest, Washington, DC 20009

$1,270,000

4
Bedrooms
2,616
Square Feet
0.05
Acres

1112 Euclid Street Northwest, Washington, DC 20009

a front view of a house with a garden and trees

$1,230,000

6
Bedrooms
5,606
Square Feet
0.55
Acres

500 Whithorn Court, Lutherville-Timonium, MD 21093

a view of a brick house with a large tree

$1,175,000

3
Bedrooms
2,793
Square Feet
0.12
Acres

1323 Ingraham Street Northwest, Washington, DC 20011

a front view of a house with garden

$1,160,000

4
Bedrooms
2,296
Square Feet
0.10
Acres

5208 13th Street Northwest, Washington, DC 20011

a front view of a house with a garden

$1,105,000

4
Bedrooms
2,238
Square Feet
0.09
Acres

5105 13th Street Northwest, Washington, DC 20011

$1,100,000 | 5103 13th Street Northwest, Washington, DC 20011

$1,100,000

4
Bedrooms
2,279
Square Feet
0.09
Acres

5103 13th Street Northwest, Washington, DC 20011

$1,100,000 | 11201 Freas Drive, North Potomac, MD 20878

$1,100,000

4
Bedrooms
4,169
Square Feet
0.24
Acres

11201 Freas Drive, North Potomac, MD 20878

Past Rentals
$5,200 | 3270 Worthington Street Northwest, Washington, DC 20015

$5,200

4
Bedrooms
2,287
Square Feet
0.11
Acres

3270 Worthington Street Northwest, Washington, DC 20015

$4,800 | 2700 Ross Road, Chevy Chase, MD 20815

$4,800

4
Bedrooms
2,694
Square Feet
0.21
Acres

2700 Ross Road, Chevy Chase, MD 20815

a front view of a house having yard

$3,200

4
Bedrooms
2,114
Square Feet
0.06
Acres

3 Stridesham Court, Baltimore, MD 21209

$2,275 | 3883 Connecticut Avenue Northwest, Unit 203, Washington, DC 20008

$2,275

1
Bedrooms
732
Square Feet

3883 Connecticut Avenue Northwest, Unit 203, Washington, DC 20008

a city street lined with tall buildings

$2,100

1
Bedrooms
700
Square Feet

937 Randolph Street Northwest, Unit 4, Washington, DC 20011

$1,695 | 915 Ryan Street, Baltimore, MD 21223

$1,695

3
Bedrooms
1,536
Square Feet
0.04
Acres

915 Ryan Street, Baltimore, MD 21223

$1,650 | 3204 Old Post Drive, Unit 32045, Pikesville, MD 21208

$1,650

2
Bedrooms
1,246
Square Feet

3204 Old Post Drive, Unit 32045, Pikesville, MD 21208

$1,500 | 2901 Fallstaff Road, Unit 302, Baltimore, MD 21209

$1,500

2
Bedrooms
1,159
Square Feet

2901 Fallstaff Road, Unit 302, Baltimore, MD 21209

$1,025 | 1406 Nicodemus Road, Reisterstown, MD 21136

$1,025

1
Bedrooms
4,060
Square Feet
3.08
Acres

1406 Nicodemus Road, Reisterstown, MD 21136