Remodeling in DC: Key Zoning, Setbacks, and Historic Districs

When planning your remodel in DC., it's crucial to navigate the local code regulations that will impact your project. Being informed about these regulations can help streamline your remodel process and avoid potential setbacks. We created this page to give you a clear, user-friendly overview of DC's zoning and setback rules so you can move forward with confidence.

Understanding Zoning in DC

Washington, DC is divided into multiple zoning districts, each with its own regulations governing lot usage, building height, setbacks, and lot occupancy. The main residential zoning categories include:

R-1-A/R-1-B: Single-family detached homes
R-2: Semi-detached homes
R-3: Rowhouses and townhouses
RF Zones (RF-1, RF-2, RF-3): Rowhouse neighborhoods, often older or historic
RA Zones (RA-1 to RA-4): Multifamily/apartment housing

Quick Setback Summary by Zone

Zone

R-1-A

R-1-B

R-2

R-3

RF-1

RA-1 to RA-4

Front Yard

25 ft (min)

Block average

Block average
Block average

Varies

Side Yard

8 ft (min)

6 ft (min)

5 ft (1 side)

None

Varies

Rear Yard

25 ft

20ft
20ft
20ft

Varies

Notes

Large-lot single-family homes

Medium-lot single-family homes

Semi-detached homes

Rowhouses

Rowhouses/Residential flats

Apartment/multifamily housing

Before – TriVistaUSA Design + Build Home Addition, Washington, DC

After – TriVistaUSA Design + Build Home Addition, Washington, DC

Proposed Design Plans – TriVistaUSA Design + Build Rowhouse, Washington, DC

Rendering 1 – TriVistaUSA Design + Build Rowhouse, Washington, DC

Rendering 2 – TriVistaUSA Design + Build Rowhouse, Washington, DC

Rendering 3 – TriVistaUSA Design + Build Rowhouse, Washington, DC

Before – TriVistaUSA Design + Build Home Addition, Washington, DC

After – TriVistaUSA Design + Build Home Addition, Washington, DC

Construction Set – TriVistaUSA Design + Build Rowhouse, Washington, DC

Not sure what zone you're in?

You can find your zoning by searching your address in the DC Zoning Handbook .

For more detailed information about your specific zone—including rules on accessory structures, nonconforming lots, and other site-specific regulations—check out the DC Residential Zones Handbook.

How can I maximize space in my remodel with these restrictions?

In Washington, DC, this challenge is especially pronounced in rowhouses, where space is already at a premium and lot sizes are narrow. However, even with these restrictions, there are smart strategies to gain more livable space without compromising zoning rules.

Example 1: DC Rowhouse Expansion

In this DC rowhouse project, the goal was to create a more open, functional living space that better suited the needs of a growing family. The existing kitchen felt tight, there wasn’t enough seating or dining space, and the old deck was in rough shape—making both indoor and outdoor living feel limited.

The design solution focused on improving flow and maximizing usable square footage. By removing the wall behind the kitchen, we created space for a larger dining area and more comfortable seating. The plan also included extending the home outward to accommodate a brand-new, modern porch—seamlessly blending indoor and outdoor living.

Want to see more? Read the full case study for an in-depth look at this project!

Example 3: Pop-Top Addition on a Standalone DC Home

In this renovation, the focus was on optimizing the existing space through strategic reconfiguration. We removed a wall to open up the kitchen to the dining room, creating a brighter and more connected first-floor living area. The kitchen was completely renovated, with new cabinetry, appliances, and fixtures throughout.

Example 2: Pop-Top Addition on a Standalone DC Home

This project involved reworking the home’s existing layout and adding a full second story to create significantly more livable space—all while staying within local zoning and setback requirements.

Rendering 1 – TriVistaUSA Design + Build Rowhouse, Washington, DC

Rendering 2 – TriVistaUSA Design + Build Rowhouse, Washington, DC

What if I live in a Historic District?

If your home is in one of DC's Historic Districts–such as Capitol Hill, Georgetown or Shaw–you may face additional design and placement restrictions, even if your project meets standard zoning setbacks.

In these areas, any additions or new structures visible from a public street must maintain the historic character of the neighborhood. All proposed changes must be reviewed and approved by the Historic Preservation Office (HPO).

So, what's next?

We understand that navigating its guidelines and regulations can often feel overwhelming. That’s why we’re here to simplify the process and ensure a smooth experience from start to finish. Our team is dedicated to guiding you every step of the way, so you can focus on turning your vision into reality.

If you are interested in remodeling with us, send us an inquiry!