Home › Service Areas › Montgomery County, MD
Montgomery County runs one of the more demanding permit and energy code regimes in the region. That is manageable when it is planned for and expensive when it is discovered.
Montgomery County's commercial inventory splits three ways: the mid-rise office and mixed-use cores in Bethesda, Silver Spring, Rockville and North Bethesda; an enormous garden-apartment and condominium stock from the 1950s through the 1980s; and suburban retail centres and flex/industrial along the I-270 corridor.
The garden apartment inventory is the one that generates the most roofing work and the most bad advice. Those buildings have low-slope sections tied into pitched sections, decades of patch history, and boards or management companies that have been quoted three wildly different scopes. They need a moisture survey before anyone quotes anything.
Maryland has no single statewide permit office. Each county — and some municipalities — runs its own permit counter, fee schedule and inspection scheduling.
Commercial reroofing generally requires a permit from the county. Thresholds and whether a sealed drawing is needed vary by county and by scope, and a change of system or added insulation height is more likely to trigger review than a like-for-like replacement.
Pull it in the roofer's name. If a contractor asks you to take the permit out as the owner, they are moving liability for the work onto you. That is a reason to pick someone else.
Maryland sets a floor through the Maryland Building Performance Standards. The State adopted the 2021 IBC effective May 29, 2023, with local jurisdictions required to implement by May 29, 2024. Counties may adopt local amendments on top of that, and several do — which is why the specific county matters even though the base code is statewide.
IBC §1511 prohibits a roof recover where the existing roof already has two or more applications of any roof covering. It also prohibits recovering when the existing roof is water-soaked or has deteriorated to the point that it is no longer an adequate base. In either case the code requires removal down to the deck. This is the single most common place a cheap bid quietly goes non-compliant.
The DMV sits in climate zone 4. For low-slope roofs with insulation entirely above the deck, the IECC commercial table calls for roughly R-30 continuous. On an older building that was built with two inches of insulation, meeting that number is frequently the largest single line item in a replacement — and the reason a tear-off costs meaningfully more than the recover somebody quoted you.
Wind uplift concentrates at perimeters and corners, and ASCE 7 requires tighter attachment in those zones. A bid that specifies one fastening pattern for the whole roof is either an oversight or a shortcut. Ask to see the zones called out.
Roofs need primary drainage plus a secondary (overflow) path sized so a blocked primary drain does not load the structure with standing water. On replacements we look at whether existing overflow scuppers are present and correctly set — on older DMV buildings they often are not.
Montgomery County has adopted the 2021 IBC, IEBC, IMC and IECC with county amendments. The energy code is the one to plan around: on a tear-off, expect to insulate to the current requirement rather than matching what is up there. On an older garden apartment with two inches of insulation, that is a real cost and a real design change at parapets, thresholds and equipment curbs.
The Department of Permitting Services handles commercial building permits, plan review and inspection scheduling. Commercial reroofing generally requires a permit. Whether the submission needs a sealed drawing depends on scope — a change of system, added assembly height or any structural work pushes it toward full review, where a like-for-like replacement may not.
A large share of Montgomery County roofing work sits under Maryland condominium and HOA law. That means reserve studies, special assessment votes, notice periods and board meeting calendars — and a project timeline that has to be built backwards from a vote, not forwards from a start date. We write condition reports so they can be read by a board, not only by a facilities manager.
Much of the county's older multifamily sits under mature tree canopy. Blocked drains and scuppers are the leading cause of ponding and the leading avoidable cause of roof failure here. A fall drain-clearing visit is worth more in Montgomery County than almost anywhere else in the region.
Counties typically inspect in progress and at completion, and several want to see the deck after tear-off. Inspection scheduling lead time is the most common cause of a roof sitting open longer than planned — we build it into the schedule instead of discovering it.
| System | Installed cost / sq ft | Typical service life | Notes |
|---|---|---|---|
| TPO, mechanically attached | $9 – $16 | 20–30 yrs | Most common DMV replacement. Reflective, heat-welded seams. |
| TPO, fully adhered | $11 – $19 | 20–30 yrs | Quieter, better wind performance, no fastener pattern telegraphing. |
| EPDM, mechanically attached | $8.50 – $15 | 20–30 yrs | Proven on older stock. Black absorbs heat; ballast or white options exist. |
| EPDM, fully adhered | $10.50 – $18 | 25–30 yrs | Cleaner detailing around heavy penetration counts. |
| PVC single-ply | $11 – $19 | 20–30 yrs | Grease and chemical resistant — restaurants, kitchens, industrial exhaust. |
| Modified bitumen, 2-ply | $10 – $18 | 15–25 yrs | Tough underfoot. Good on small, complex, high-traffic roofs. |
| Built-up (BUR), 3–4 ply | $11 – $20 | 20–30 yrs | Rare as new work now; mostly repaired or overlaid. |
| Silicone restoration coating | $3.50 – $7 | 10–20 yrs | Only over a sound, dry substrate. Renewable warranty at end of term. |
| Metal retrofit / recover | $12 – $25 | 30–40 yrs | Wide range — standing seam over purlins vs. coating an existing panel roof. |
How to read these. Ranges are DMV market pricing for planning and budgeting, not a quote. Real numbers move with deck condition, insulation required to hit code, access and staging, how much rooftop mechanical equipment has to be lifted and reset, and whether the work is phased around tenants.
| Item | Typical range | Notes |
|---|---|---|
| Leak investigation and repair | $500 – $5,000 | Most single-source leaks land in the low four figures. Chronic leaks need a survey, not a patch. |
| Infrared or moisture survey | $0.05 – $0.15 / sq ft | Maps wet insulation so you replace only the saturated area instead of the whole field. |
| Preventive maintenance program | $0.08 – $0.20 / sq ft / yr | Two inspections a year plus minor repairs. Usually required to keep an NDL warranty alive. |
| Tapered insulation for drainage | $2 – $5 / sq ft (added) | Where ponding has to be corrected rather than lived with. |
| Deck replacement | $6 – $14 / sq ft (added) | Only discovered once the old roof is off. Should be a unit price in your contract, not a change order fight. |
How to read these. Ranges are DMV market pricing for planning and budgeting, not a quote. Real numbers move with deck condition, insulation required to hit code, access and staging, how much rooftop mechanical equipment has to be lifted and reset, and whether the work is phased around tenants.
Generally yes, through the Department of Permitting Services. Ordinary repair below the code threshold may be exempt, but replacement and recover are not, and the permit should be pulled in the contractor's name.
The 2021 editions of the IBC, IEBC, IMC and IECC with county amendments, sitting on top of the Maryland Building Performance Standards. The energy code is enforced on replacements, which is what most owners are surprised by.
Start with a written condition report with photographs and three costed options — repair, restore, replace. Boards approve documented decisions, not verbal recommendations. We write the report expecting it to be read by people who are not roofers.
Most low-slope replacements in the county run $9 to $17 per square foot installed, with the mid-rise cores at the higher end for access and staging reasons. Insulation required to meet the 2021 IECC is frequently the largest variable.
Twenty minutes on site in Montgomery County, Maryland. A written report with photos and numbers. No obligation.
Tell us about the property. We'll schedule a site walk and send a written condition report with photos.
We'll be in touch within one business day to schedule your 20-minute roof walk. Meanwhile, here's the capability statement:
Capability Statement (PDF)Systems, services, service area, insurance & contact Or grab a time right nowPick a slot on the calendar — 30 minutes