About Us

Company Overview

For over two decades, Washington Landmark Construction LLC (WLC) has been at the forefront of construction and historic renovation in the DC Metro area. Founded with a passion for preserving the unique charm of historic properties, we have developed a reputation for meticulous work that respects tradition while embracing modern needs. Our expertise in adaptive reuse allows us to create multi-unit residences that maintain their original character while offering contemporary living at its finest.

Washington Landmark Construction, LLC, is one of the region’s premier builders of single-family homes and is particularly known for its award-winning renovation and rehabilitation of historic buildings in Montgomery County, MD.

WLC’s work on the Gymnasium at National Park Seminary (NPS) began with the acquisition of a derelict 20,000 sf building within the National Park Seminary Historic District in Silver Spring.   Working with the existing community HOA and guided by the conditions set by Maryland Historic Trust, WLC transformed the building to its previous splendor and converted it into 12 residential condominiums.   The project was not only awarded a significant level of Maryland historic tax credits but also received the 2015 Montgomery County Award for Historic Preservation and a 2017 Montgomery County Design Award. 

WLC’s latest project consisted of the restoration and rehabilitation of the three-building Power Plant at NPS complex. Fourteen residential units, including underground parking were created into 40,000 sf space, with a federal mandate driven by the tax incentives to maintain ownership of the lower garage and storage level through 2025.  The project was conducted with the oversight and approval of MHT.

Our current project, the Warner Circle Mansion, is one of the most historically significant homes in the city of Kensington. The original home of Brainard Warner, founder of the Town of Kensington, MD, the house served as his summer home. Our goal with this restoration project is to reimagining these stately structures. The project will both rehabilitate a treasured community asset into multi-family housing while also ensuring its care and upkeep into a new era. Warner Circle Park, which surrounds the project, will be preserved for continued public use, with elements of the new condominium development (a stone terrace, fitness center, and lobby) opened to community use up.

Overview

The way we frame houses is based on physics. Durable building assemblies must consider thermodynamics. Healthy indoor air quality and comfort relate to human biology. And good design plays off our psychology. As designers and builders, there’s not much we do that isn’t grounded in science.

Healthy Air Quality

People live and work in our buildings and best practice and common sense should be to do all we can to deliver healthy indoor-air quality in our homes. 

Commissioning

Commissioning a new home should not start at the end of construction, but during the planning stage, and should include inspections during the construction phase. Proper system design and sizing needs to be completed before construction starts.

Learning Opportunity

We must also keep in mind that we’re building economically and emotionally important projects for our clients. Therefore, we must strive not to make the same mistake twice and to share our collective knowledge to help others avoid the mistakes that we have made. 

Ventilation

The ideal ventilation system is completely independent from the heating/ cooling system. Ventilation supply air is ducted directly to the bedrooms and living spaces while the ventilation exhaust air is drawn directly from bathrooms, kitchens, mudrooms, and other sources of moisture.

Radon Mitigation System

Effective venting for Radon from the concrete slab thru a PVC system even though the Mansion tests low for radon.

Conditioning

Basements, and attics need to be conditioned like the rest of the home to prevent moisture issues (think mold, mildew, and rot), to forestall heating and cooling losses to the outside (think comfort and energy efficiency), and to reduce exposure to contaminants (think healthy indoor-air quality).

Rainwater Management

Gutters are sized to collect the full roof load. Downspouts and underground piping will take water to the bio-retention swales and drywells. Underground piping will have 6” fall for the first ten feet (this gets the water away quickly from the foundation.

Air Barriers

All assemblies in all climate zones should have an air barrier clearly called out on the drawings and the design should take care to maintain continuity of this system as it travels around the building.

Roof Venting

The Code specifies a ratio of 1 sf of venting for every 300 sf of attic space. This allows our roofs to remain cooler and dryer, which maximizes their durability and reduces the accelerated loss of indoor conditioned air through leakage to through the attic.