In April 2024, the Montgomery County Historic Preservation Commission approved a Historic Area Work Permit for a partial demolition, a new two-story addition, a 1.5-story garage, and a patio at 17 West Irving Street, a property inside the Chevy Chase Village Historic District. The design had cleared the county's review. The massing, the materials, the compatibility with the streetscape, all of it had been measured against Montgomery County Code Chapter 24A-8 and the Secretary of the Interior's Standards for Rehabilitation, and the commission signed off.
Then Chevy Chase Village's own Board of Managers said no. Not to the addition. To removing a 14-inch-diameter black gum tree standing in the front yard. The applicant went back to the architect, reduced the scale of the addition, and resubmitted a plan that worked around the tree instead of through it. Staff reports filed with the county in January and April of this year show the project still moving through those revisions, roughly two years after the original approval.
That sequence is the thing to understand before buying or renovating inside Chevy Chase Village's historic boundary. The county's design review and the Village's own permitting do not run on the same clock, and clearing one does not clear the other.
Two Governments, Two Approvals, One Project
Chevy Chase Village is one of several small municipalities that share the Chevy Chase name and each run their own permitting layer on top of Montgomery County's. Chevy Chase Village, the Town of Chevy Chase, Sections 3 and 5, Martin's Additions, and North Chevy Chase all have their own building departments, and a property's exact boundary determines which one applies before a shovel goes in the ground.
Inside Chevy Chase Village specifically, the Village will not issue its own building permit until the county's Historic Area Work Permit has already been issued. That is not a formality. It means a homeowner cannot even start the Village's process, driveway permits, tree permits, the building permit itself, until the county's historic design review is finished. The two approvals are sequential, not parallel, and the Village's own guidance spells this out directly to residents applying for permits.
The county's review is architectural. It asks whether new construction is compatible with the district's character, whether materials match, whether a proposed addition would be visible from the street in a way that disrupts the block. The Village's review asks a different set of questions entirely: lot coverage, setbacks, height, and what happens to the trees already on the property. A project can pass the first test and still fail the second.
The Tree That Can Overrule an Approved Design
Tree removal in Chevy Chase Village runs through the Village Arborist, entirely separate from the county's Historic Preservation Commission. According to Chevy Chase Village, if the Village Arborist finds a tree healthy, the Village Manager cannot approve its removal, regardless of what the HAWP allows.
The 17 West Irving Street case shows this playing out in real time. The HPC's conditional approval in April 2024 covered the demolition of an existing wing and construction of a new addition. It said nothing that protected the tree. The Village denied removal after the county's conditional approval. The revised plans reduced the massing specifically to minimize the addition's footprint near the tree, though the record does not establish that the Village's denial prompted the change.
The Village's permitting extends into details that surprise most people. Replacing a driveway, even simple resurfacing, requires its own Village building permit, separate from anything the county requires. Inside the historic district, that same driveway work may also need a Historic Area Work Permit. Fences and walls have their own height rules measured from ground level at the lower side, which means a decorative cap on a post can push a fence over the legal limit even if the fence itself is compliant.
None of this means additions and renovations do not happen in the Village. They do, regularly, and the county's guidelines lean toward leniency for non-contributing structures and rear-facing work that is not visible from the street. But the process has more independent checkpoints than a first-time buyer or a first-time renovator typically expects walking in.
What Counts as a Renovation Versus a Demolition
Montgomery County has its own separate threshold that determines which permit track a project falls into, and it applies whether or not the historic district is involved. Since August 2023, county code has defined demolition as removing more than two-thirds of a house's first-story exterior walls. Put the other way: if less than 33 percent of the existing first-story exterior walls enclosing habitable space remain standing above the foundation, the county classifies the work as a demolition, not an alteration.
That distinction changes everything about the permit path. A demolition classification requires its own demolition permit and, as Ben Norkin Architecture explains, a performance bond sized to the cost of the work. An alteration and addition permit, by contrast, is the lighter path, and the county has noted turnaround times as short as a few business days for well-prepared applications.
Inside a historic district, this threshold stacks on top of the architectural review rather than replacing it. A design can be fully "compatible in character" under the HAWP guidelines and still trip the county's wall-retention math if the renovation plan calls for opening up more of the existing structure than the numbers allow. Keeping at least a third of the first-story exterior walls intact is what keeps a gut renovation on the simpler track instead of sliding into demolition territory, with everything that follows from that classification.
The Village's Own Numbers Cap What Fits
Even a design that clears both the county's historic review and the demolition threshold still has to fit inside Chevy Chase Village's own zoning limits, which exist independently of anything the county's preservation guidelines address.
| Constraint | Limit | Who enforces it |
|---|---|---|
| Lot coverage | 35% of total lot area | Chevy Chase Village Code |
| Front setback | No structure within 25 feet of the front line | Chevy Chase Village Code |
| Building height | Roughly 30 to 35 feet, depending on roof type | Chevy Chase Village Code |
| Tree removal | Village Arborist review | Village Arborist / Board of Managers |
| Building permit issuance | Withheld until county HAWP is issued | Village Manager |
These numbers are why a lot that looks like it has room for a substantial addition on paper can turn out to have far less usable footprint once lot coverage and setback lines are drawn in. A 6,000-square-foot lot at the Village's 35 percent cap allows roughly 2,100 square feet of building footprint total, including the existing house, before any addition is even measured against the historic district's design standards.
What This Means If You're Evaluating a Renovation-Upside Property in the Village
For a buyer looking at a fixer-upper inside Chevy Chase Village's historic boundary with plans to add on, the practical sequence looks different than it does almost anywhere else in the DMV. The design has to satisfy the county's Historic Preservation Commission. The wall-retention plan has to stay above the 33 percent threshold to avoid the demolition track. The footprint has to fit inside the Village's lot coverage and setback numbers. And any tree standing between the house and the proposed addition needs its own answer from the Village Arborist, independent of what the architect drew or what the county approved.
Montgomery County's Historic Preservation Office encourages exactly this kind of upfront conversation, inviting applicants to discuss major work with staff before filing a formal HAWP application. That conversation is worth having before a design contract is signed, not after, because a redesign after HAWP approval, as the West Irving Street project shows, can add most of a year to a timeline that already runs on a two-week HPC meeting cycle.
A tree survey and a preliminary read on lot coverage math, done before an offer goes in, tells a buyer more about what a property can actually become than the listing photos ever will.
Dallen Russell has spent enough time on both sides of a renovation, scoping the work and closing the deal, to walk through exactly this kind of layered approval process before you write an offer. If a Chevy Chase Village property has you thinking about what it could become, Dallen Russell will sit down with you and the actual numbers before you commit to anything. Coffee's on him.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
