Hannegan Construction is a locally owned and operated residential whole-home remodeling company serving our neighbors in DC and Northern Virginia.
Whether you’re looking to expand upward, outward, or below ground, we’ll help you make smart use of your existing footprint—and your budget.
A well-planned home addition can give your family the space it needs without the stress of buying a new house. At Hannegan Construction, we build practical home additions for homeowners in Washington, DC, Reston, and across Northern Virginia.
We focus on realistic, functional additions that fit the way people live in this region. No overbuilding. No overpromising. Just space that works for your needs and adds lasting value.
Common additions we build in DC and Northern Virginia include:
Rear Additions
Great for adding square footage without changing the look of the home from the street—popular in rowhomes, colonials, and ramblers.
Pop-Top Additions (Second Story)
Many homeowners in Arlington, Falls Church, and Reston are choosing to build up instead of out. We can help you add a full second story or partial upper-level addition.
Bump-Outs
These smaller-scale additions are perfect for expanding a kitchen, creating a breakfast nook, or making room for a larger bathroom or closet.
Basement Dig-Outs & Walkouts
Especially common in DC, where lots are tight. We excavate and finish basements to create more livable space below grade, often with exterior access for rental or in-law use.
Accessory Spaces
Home offices, sunrooms, laundry rooms, or guest suites that feel like a natural part of the home—without needing a full custom design plan.
We’re not a luxury builder, and we don’t come in with cookie-cutter templates. Every addition we build is tailored to the home and homeowner. We work with or without formal architectural plans, depending on your project scope, and we’re known for being flexible, communicative, and able to start quickly.
If your addition needs foundation work, excavation, or basement underpinning, we can handle that too—it’s one of our specialties.
If you’re running out of space and want to explore your options, let’s talk. We’ll meet you on-site, walk through ideas, and give you honest feedback—plus a free estimate.
📞 Call Hannegan Construction at 703-899-5629
Serving Reston, Arlington, Alexandria, DC, and the surrounding Northern Virginia suburbs.
