Addition services for the Washington D.C. metropolitan area

An addition can be a small bump-out, or a single or multiple-level structure on a single-family home or a pop-up third-story addition on a rowhouse. Whether you are bumping out a wall, adding onto the main level or raising the roof for a second story, in every addition project, our architects and designers aspire to:

  • Design an addition that blends with the existing house and site, unless otherwise desired by the client
  • Create a seamless connection between the existing house and addition
  • Advise you on the ideal square footage to fulfill your needs
  • Build better views, add natural light, and improve your home’s relation to the outdoors
  • Take advantage of the new walls to improve insulation and weatherproofing

Benefits of a home addition

1. Maximize the value of your home.

We can advise you on the cost versus value of the type and size of the addition that would best suit your home and the value it would add. Additions that include kitchens and baths add the highest value.

2. More cost-effective than moving

If you have thought about finding a new home to provide the space you need, but love your home and neighborhood, building an addition may best fit your needs. Our expertise can help you make the “love it or list it” decision.

3. Flexible space for a variety of uses

An addition can provide a suite for guests, nannies/au pairs, renters or give you more room for a hobby.

4. Addressing energy-efficiency and comfort

Opening up walls allows us to better insulate a house and install efficient HVAC systems and appliances.

Why Landis?

An all-in-one approach

Building an addition is a complex job that requires many decisions, engineering consultation, and skilled carpenters. At Landis, we simplify the remodeling process because we can meet every requirement in-house and provide guidance on every decision.

Landis offers a full-time permit expeditor, a proprietary design team led by registered architects and builders that cover plumbing and electrical —no need to outsource or do extra work.

How the addition process works with Landis

Step 1. Consultation and design contract
Step 2. Initial design meeting
Step 3. Schematic design
Step 4. Design development
Step 5. Permitting and construction

How long does each phase take?

Initial design scope and selections: Two to four months

Permitting: Two to four months

Construction: Three to eight months

Total project: Seven to sixteen months

Case Studies

Somerset Side Addition

We completed an addition and whole-house renovation on this brick center hall colonial in the Somerset neighborhood. The 1937 house still had many of the period trim and molding details. Our clients wanted to expand to create a comfortable home for the family with plenty of entertaining space. At the first floor, the side addition and a small rear one-story addition allows for an open kitchen, dining, living room and access to outdoor entertaining.

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Glover Park Rowhouse Third-Story Addition

With this rowhouse, we could only go up to provide the additional space that this family of four needed. Our seamless design is barely noticeable from the front façade. We kept the angled roof but replaced the small window with several larger windows. This level allowed for a master bedroom/bath suite and another bedroom.

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A passion for D.C. area homebuilding

Landis has been building homes in the District, Maryland, and Virginia for 31 years. We know D.C.’s surrounding neighborhoods and we know the design and architecture styles of our metropolitan area. We are a family-owned business, we know and love our community, and we are dedicated to, and passionate about, our craftsmanship.