3209 Marshall Boulevard, Sullivan's Island, SC
Cobalt Residential

Luxury homes on Charleston's barrier islands.

From its roots in multifamily investment to the ground-up development of oceanfront estates on Sullivan's Island and the Isle of Palms, Cobalt Residential blends long-term development with the momentum of Charleston's residential market.

Cobalt Residential, a division of Cobalt Property Group, began its search for multifamily investments in 2005 with the purchase of 350 units — a foundation that eventually led into condominium development, short-term rental development, and duplex/triplex renovation and ground-up construction.

The division's multifamily strategy ran from 2005 to 2020, blending longer-term commercial-style holds with shorter, quicker single-family investments. With more than 47 people moving to the Charleston area every day since 2005, appreciation in residential housing has accelerated sharply.

Since 2020, Cobalt Residential has primarily focused its efforts on the development of luxury homes on Charleston's barrier islands — specifically Sullivan's Island and the Isle of Palms — where founder Patrick Marr has resided since 2005.

Multi-Family Investments

Past & present, 2005–2020
Preservation Development Portfolio, Charleston, SC

Preservation Development Portfolio

Charleston, SC
More than thirty duplex and triplex buildings acquired, developed and managed in gentrifying Eastside and West End submarkets beginning in 2012. Assembled for $46M; sold in 2017 for more than $62M.
2801 Fifteenth Street NW, Washington DC

2801 Fifteenth Street, NW

Washington, DC
  • Purchased 2009 · $4.2M
  • 64 units
  • Leased 97%
Meridian Park submarket. Common areas and units upgraded; current (2024) valuation of $13 million.
South Pointe Apartments, Hanahan, SC

South Pointe Apartments

Hanahan, SC
  • Purchased 2006
  • 256 garden-style units
  • Sold 2018 · 40% gain
Folly Beach Portfolio, Folly Beach, SC

Folly Beach Portfolio

Folly Beach, SC
A condemned beachfront building and two houses purchased in 2021; fully renovated and rebuilt as short-term rental duplexes and houses. Annual revenue exceeds $1.3M.
Sullivan's House, 2302 Middle Street, Sullivan's Island, SC

Sullivan's House — 2302 Middle Street

Sullivan's Island, SC
  • Purchased 2017
  • 4 condominiums, 2,500–2,700 SF each
A vacant historic property converted to four luxury condominiums, achieving a 1.65x investment multiple in under two years. Winner, 2019 SC AIA Award for Best Adaptive Reuse.
Rosewood Apartments, Goose Creek, SC

Rosewood Apartments

4501 Harbour Lake Drive, Goose Creek, SC
  • Purchased 2006
  • 100 townhomes
  • Sold 2018 · 40% gain
Naval base submarket of Goose Creek, SC.
1912 E. Montague Street

1912 E. Montague Street

Charleston, SC

Single-Family Luxury Developments

Sullivan's Island & Isle of Palms
3209 Marshall Boulevard, Sullivan's Island, SC

3209 Marshall Boulevard

Sullivan's Island, SC
  • Acquired off-market 2023
  • Delivered early 2026
  • Listed $15.8M
An abandoned house on the point of Sullivan's Island, rebuilt with ocean views on three sides. Total capitalization of $10.1M; investors are projected to receive a 2x equity multiple upon sale.
3030 Jasper Boulevard, Sullivan's Island, SC

3030 Jasper Boulevard

Sullivan's Island, SC
  • Purchased 2010 · $990,000
  • 4,000 SF custom home
  • Sold $3.6M
Constructed with a deep water dock for $1.6M; retained as the personal residence of Patrick and Maureen Marr before its sale eight years later.
312 Palm Boulevard, Isle of Palms, SC

312 Palm Boulevard

Isle of Palms, SC
  • Joint venture 2025
  • Project cost $1.9M
  • Listed $2.75M
Developed with Rolina Homes; currently operating as a short-term rental with an exit strategy planned for late 2026, after peak rental season.
214 Charleston Boulevard

214 Charleston Boulevard

Isle of Palms, SC
Patriots' Hill

Patriots' Hill Coming Soon

Charleston, SC

Building the next luxury home on the islands.

Cobalt Residential partners with investors and joint venture partners on select ground-up luxury home developments.

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