What a home addition in Potomac actually involves
The 1980s and 1990s Potomac floor plan gives you a large but isolated kitchen, a formal living room that sits empty, and a dated primary bath. Reworking those three is usually a better investment than adding a wing. On septic-served Potomac lots, the location of the drainfield and its reserve area constrains where a deck, addition or pool house can physically go, and that gets established before design, not after.
- Permit submission and review. A complete package — site plan, architectural, structural, energy compliance — submitted to the reviewing jurisdiction, with responses to any comments handled by us rather than forwarded to you.
- Excavation and foundation. Footings below the local frost depth, foundation walls or piers, waterproofing and drainage, and a slab or crawlspace detail that will not become the source of a moisture problem later.
- Framing, roof tie-in and envelope. Framing to the engineered design, and then the part that separates good additions from obvious ones: the roof tie-in, the flashing at the intersection, and matching the existing roofing, siding and trim so the addition does not announce itself.
- Interior finish and the seam. Floor levels reconciled, drywall and trim matched, flooring run continuously where possible, and the transition detailed so the house reads as one house.
Lead paint: the rule that applies to older Potomac homes
One regulation shapes almost every project on older housing here, and it is the one homeowners hear about least. Under the EPA's Renovation, Repair and Painting rule, disturbing painted surfaces in a pre-1978 home requires a certified firm, a contained work area and a defined cleanup process. A meaningful share of Potomac homes predate 1978, and the older neighborhoods here almost certainly do. We hold the certification and we price the containment into the job rather than discovering it later. A bid that never mentions lead on a house of this age is a bid that has not been thought through.
What drives the cost on a Potomac home addition
Anyone can publish a range. Almost nobody can publish one that survives contact with an actual house, which is why we do not. The list below is the honest version: the specific things that decide whether your project lands at the bottom or the top of whatever range you have in your head.
- How the roof ties in. A simple gable extension is straightforward; a tie-in into an existing hip or a low-slope intersection is engineering and flashing detail.
- Whether the existing HVAC, electrical service and, on septic properties, the septic system can absorb the added load, or whether they have to be upgraded.
- Second-story additions, which require verifying that the existing foundation and framing can carry the new load — sometimes they can, sometimes they need reinforcement.
- One-acre-plus zoning through much of the area, with a meaningful share of Glen Hills and outer Potomac properties on private well and septic rather than public utilities. That is a Potomac-specific factor and it belongs in the conversation early.
The mistakes we get called in to fix
- Assuming the existing HVAC will handle the new space. Adding conditioned area to an already marginal system means the whole house is uncomfortable instead of just the addition.
- Not verifying the septic system's capacity on a septic-served property before adding bedrooms.
- Choosing a builder who cannot show you a license, a certificate of insurance, and the permit history on their own jobs.
One licensed team, one contract, one point of contact
An addition is the only remodeling project that is also a land-use question. Before anyone talks about what you want, somebody has to establish what the lot and the zoning ordinance will allow — setbacks, lot coverage, height, and how the existing house already counts against those limits.
Our position is simple and it is checkable. We hold MHIC #111971 in Maryland. We carry general liability and workers' compensation coverage, and we will send you the certificates before you sign rather than after you ask twice. Our subcontracted trades carry their own coverage and their own trade licenses, and the trade permits are pulled under those licenses, as they are required to be. You sign one contract with one company, and that company is the one answering the phone when something needs answering.
Where we work in Potomac
- 20854
- 20859
- Potomac Village
- Avenel
- River Falls
- Falconhurst
- Glen Hills
- Bedfordshire
How a Potomac project runs
- Free on-site consultation and a written scope. We walk the space with you, measure, look at what is behind the finishes where we can, and write down what you actually want out of the project rather than what is easiest to sell.
- Feasibility against Potomac rules, before design. We establish what the Montgomery County Department of Permitting Services will require for home addition at your address, and what your lot, your zoning and your existing house will allow. Where association architectural approval applies, that submission is prepared and filed first, because the building permit is not useful until it clears.
- Fixed written scope, then permits. A line-item scope with allowances stated plainly and a change-order process agreed in advance. We prepare and submit the permit package and handle review comments ourselves.
- Supervised production and a clean finish. MHIC #111971, one point of contact for the whole job, trades sequenced against the inspection calendar, and a closeout that includes the punch walk, the closed permits and the product documentation in one package.
Free Potomac home addition consultation
We walk the space, tell you what the Montgomery County Department of Permitting Services will require, and give you a written scope. No obligation, and the permit guidance is yours either way.
Home Additions across Potomac and Montgomery County
Our crews cover Potomac Village, Avenel, River Falls, Falconhurst, Glen Hills and Bedfordshire, across 20854, 20859. What buyers and appraisers in this market respond to is scale that matches the house, a kitchen proportioned to the room it sits in, spa-level primary baths, and additions that read as original rather than bolted on — worth knowing whether you are renovating to stay or renovating to sell.
Homeowners here usually reach us for more than one thing at a time. Related work in Potomac: whole-home renovation in Potomac, kitchen remodeling in Potomac, basement finishing in Potomac, deck building in Potomac.
There is a specific failure mode we exist to prevent: the interior contractor who opens a wall, finds water damage, and hands you a roofer's phone number. Because roofing, siding, aluminum siding, windows and gutters, soffit and fascia are trades we perform ourselves, the envelope is inside your contract rather than outside it, and there is no second company to schedule, vet and argue with.
Potomac home additions questions
Do I need a permit for a home addition in Potomac, MD?
Your reviewing authority is the Montgomery County Department of Permitting Services. An addition always requires a building permit, and it always requires zoning review, because you are changing the footprint or the volume of the structure. We confirm the requirement for your specific parcel rather than generalizing, because in this region the answer genuinely changes across a municipal boundary. We pull the permits and meet the inspections as part of the contract.
Are you licensed to do this work in Potomac?
Yes. We hold MHIC #111971 with the Maryland Home Improvement Commission, and we carry general liability and workers' compensation coverage with certificates available on request. Both numbers are publicly verifiable through the state license lookups, and we would encourage you to check ours and everyone else's you are considering.
Does my community association have to approve this?
Avenel and several other Potomac communities carry recorded architectural covenants, and those associations review exterior changes independently of the county. We prepare the submission package with the drawings, materials and specifications the committee asks for, and we sequence it ahead of the permit so the two approvals do not collide.
Will the addition look like an addition?
Only if it is designed and detailed badly. The things that give an addition away are roof pitch that does not match, a tie-in with a visible seam, siding or brick that is close but not right, and window proportions that differ from the original. Those are all decisions made at design, which is why the design and the build should not be separate conversations.