Founded in 2012, SOLID Properties is a subsidiary of Madison Investments. SOLID takes the Madison method and ethics and applies them to the work force housing market segment in the District of Columbia.  

SOLID Properties was formed with a focus on providing long-term quality, affordable and sustainable workforce housing for the Washington metro area.

Founded in 2012 by Sia Madani, Barry Madani, and Dale Denton, SOLID Properties has been acquiring properties that are either neglected or mismanaged and reinventing them through both renovation and value add opportunities. By implementing the "SOLID Properties Management team-up" and using a hands-on approach to ownership SOLID Properties makes acquisitions only with a long term view, which in turn translates to better care and upkeep of the burgeoning portfolio of assets.


SOLID is a family owned and operated firm that continues to grow through the acquisition and development of affordable housing with a focus on sustainability. 

SOLID Properties & Madison Investments currently owns multiple properties throughout the Washington, DC area. All properties are managed through SOLID Properties Management (SPM) which is dedicated solely to the SOLID Portfolio.

SOLID assets are comprised of improved, gut renovated and new construction projects. Madison Investments is also currently developing multiple ground up condo projects in the city.


Sia Madani, Principal

Sia is a founder and managing partner at Solid Properties. He is also a founder and principal at Madison Investments an award-winning Washington D.C. based real estate development company and has been focused on finance and acquisition in that role for over 10 years. He was raised and educated in the UK and moved to Washington D.C. in 1994 where he earned his Master’s in Securities Law and Financial Regulation (LLM) at Georgetown University. In 1999 Sia founded Lyon Bakery, a prominent artisan gourmet bakery that today serves over 1000 locations in the DMV.


BARRY Madani, Principal

Barry is a founder and managing partner at Solid Properties. He is also a Founder and principal at Madison Investments. He was raised and educated in the UK and moved to Washington D.C. in 2006. Barry’s background in marketing and management, coupled with his degrees in engineering and business management, from the University of Greenwich has helped him lead Madison’s development team to win multiple awards. Prior to his move, Barry founded and operated MACS Consultants, a leading marketing consultancy company based in Dubai, whose clients included Proctor & Gamble, PepsiCo International, Kellogg’s, and Philip Morris. 


Dale Denton, Principal

Dale moved to Washington, DC in 1971 right after graduating from Elon College. He worked in the U.S. Senate and House of Representatives as a speech writer for three years, before entrepreneurial pursuits got the better of him. He ventured out and started a Real Estate Company through door to door marketing. By 1981 it was the largest Residential Brokerage in Washington, D.C., doing over $700M per year in sales at a time when the average home sale was $150K. Dale Denton RE employed over 500 sales agents in 5 offices. The recession of 1990 caused an 85% drop off in business over four years and eventually was cause for the company to fold. 

In 2014 Sia Madani (son-in-law) convinced him to come back to the real estate world and help launch SOLID Properties. It struck a chord given Dale’s passion to give back and within two weeks he had returned to DC and was learning a new side of the real estate business.

Greg Weller

Raised in Northern Virginia and now a four-year resident of Eastern Market/Capitol Hill neighborhood, Greg has a strong affection for the local communities. Raised in a military family, honesty, integrity, reliability and compassion are several characteristics instilled in Greg that have led to Greg’s success.

At SOLID Properties, Greg is responsible for project analysis, property acquisitions, and project management.  Prior to joining SOLID Properties, Greg has over 7 years of banking experience related to underwriting and loan origination for commercial real estate.  His last two years were focused to affordable housing lending where he found his passion for development and improving the quality of life for many underserved communities. 

Greg has an Economics degree with a concentration in developmental and urban economics from West Virginia University.  Greg plans to further his education with a masters in real estate development. Greg spends his free time playing soccer and golf on the weekends and dining throughout DC’s ever growing food scene. 


Christina Plummer

At SOLID Properties, Christina is responsible for the daily management and operation of 11 properties throughout Washington, DC. Prior to joining SOLID Properties, Christina has over 17 years of property management with a strong experience in affordable housing in the Washington Metro Area. 

Christina attended UDC for 2 years with a concentration in accounting and computer science.  Christina spends her free time with her sons going to the movies, bowling, going on vacation to various beaches, enjoy eating at various restaurants in the Washington Metro Area and spending quality time with her grandma.

Raised in the Deanwood Area of Washington, DC, Christina was raised in a very large and strong family structure. Christina is a proud mother of two awesome boys. Raised as an only child by her mom and four uncles she had several characteristics instilled in her from her first step which were honesty, integrity, reliability, loyalty and compassion.

Nicole Dunn

At SOLID Properties, Nicole is responsible for assisting the Property Manager in effectively computing, classifying and recording numerical data to keep financial records complete while assisting with leasing and resident relations for the communities. She performs any combination of data entry and property management services and duties. Prior to joining the SOLID Properties team, Nicole had worked in various property management roles for over 21 years.

Nicole has a degree in Interior Design and Early Childhood development. She plans to further her education by receiving her Property Management License. During her free time Nicole makes jewelry, paints, draws and tattoos.

Born and raised in Derry, New Hampshire until she was 16 years old, she and her family moved to Deerfield Beach Florida, where she lived until she was 21 years old. Nicole moved to the DC Metropolitan Area to help her mother with her youngest sibling. She is an art lover; she believes that everything around her is some form of art.

Byron Tonic, Community DirectoR

Byron began his Property Management career 18 years ago with the Trammell Crow Company and has held every position from Leasing Consultant to Operation Coordinator over a 3200 apartment portfolio.

Byron also joins us after spending 5 years with Vornado/Charles E. Smith.