Ground-level decks
A deck supported by footings requires a County permit even when it is close to grade. A patio and a framed deck are different structures, and setbacks, lot coverage, drainage and easements still matter.
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Deck construction across Montgomery County
From compact Bethesda and Silver Spring lots to larger yards farther north, Montgomery County deck projects vary widely in access, grade, architecture and neighborhood requirements. The right design should respond to those conditions and the homeowner’s priorities.
DC Decks handles new construction, complete deck replacement, repair and resurfacing. We begin by identifying the goal and existing conditions, then define a scope for framing, surface material, railings, stairs and the features that make the space useful.
New decks and replacements
Define the footprint, framing, stairs, railings and surface materials for a complete deck.
Explore deck building →Deck repair
Evaluate damaged boards, rails, stairs and other localized concerns before they spread.
Explore deck repair →Deck resurfacing
Compare a new walking surface with repair or replacement when framing may remain usable.
Explore resurfacing →County, municipality and neighborhood considerations
A Montgomery County address may also be affected by a municipality, historic review, utility or septic conditions, or private HOA and covenant requirements. Those are easier to address before design choices and ordering are locked in.
For replacement and resurfacing projects, we separate cosmetic wear from structural concerns. Boards, guardrails and stairs may show obvious deterioration, while the condition of framing and connections determines which components can responsibly remain.
- Custom wood and composite deck construction
- Complete removal and deck replacement
- Repair of damaged boards, stairs and railing components
- Resurfacing over framing that is suitable for reuse
- Layout planning for additions, walkouts and established yards
Compare maintenance, appearance and installed value
Pressure-treated wood can provide a traditional look and lower initial material cost, with periodic cleaning and protection as part of ownership. Composite can reduce routine surface maintenance and offers a broad range of colors and textures.
The decision should include railings, fasteners, trim, sun exposure and the cost of the complete system. We help homeowners compare those tradeoffs before the proposal is finalized.
How the project moves forward
Initial conversation
Share the ZIP code, project type, existing conditions and what you want the deck to do.
Site review and scope
We look at access, layout, visible conditions and material priorities before defining the work.
Proposal and preconstruction
The proposal reflects the planned scope. Required applications and approvals are addressed before construction.
Build and walkthrough
Our team completes the approved work and reviews the finished project with the homeowner.
Montgomery County deck permits
Montgomery County Department of Permitting Services states that decks supported by footings require a building permit regardless of height. Plans are submitted electronically, and some single-span, single-level decks may be eligible to use the county’s residential deck details.
Electrical features, hot tubs, wells, septic systems, zoning, municipalities and private covenants can add requirements. The county’s current deck permit process is the right starting point for project-specific guidance.
Review the Montgomery County residential deck permit process.
Permit information is general and may change. The reviewing county, city or other authority controls the current requirements for each property.
Local deck planning guide
Permits, codes and 2026 deck costs in Montgomery County
Reviewed August 15, 2026. Requirements and fees can change. The permit authority and approved documents control each project.
Start with the right authority: Montgomery County Department of Permitting Services (DPS)
Montgomery County DPS handles unincorporated properties. Rockville and Gaithersburg operate separate building-permit systems, and other municipalities or special property conditions can add review.
Early construction-cost planning
These are DC Decks planning allowances for a complete new deck in the Washington metropolitan market—not a proposal, contract price or government fee. They assume conventional residential construction, straightforward access and standard geometry. Demolition, design or engineering, permit fees, major grading or rock, utilities, cranes, roof replacement, unusual structural reinforcement, premium rails, lighting, kitchens, hot tubs and other upgrades can be additional.
On a phone, swipe the table left and right to see all columns.
| Project type | Early planning allowance | What changes the budget |
|---|---|---|
| Ground-level wood deck | $55–$90 / sq. ft. | Footings, site access, steps, edging, drainage and wood species |
| Ground-level composite or PVC | $75–$125 / sq. ft. | Product line, fastening, trim, heat exposure and border details |
| Elevated or walkout wood deck | $75–$125 / sq. ft. | Height, stairs, guards, bracing, post and footing design |
| Elevated composite or PVC deck | $95–$160 / sq. ft. | Structure, railing system, fascia, stairs and difficult access |
| Rooftop deck | Feasibility study + engineered budget | Roof capacity, reinforcement, waterproofing, access, zoning and crane logistics |
| Repair or resurfacing | Site-measured after framing review | What can safely remain, rail and stair work, rot and hidden connections |
Permit fees are separate. Montgomery County increased permitting fees effective July 1, 2026. Use the current DPS fee estimator or regulation at filing; an older flat deck-fee PDF may not reflect today's charge. Government fees are separate from construction allowances. Check the current official fee source.
Ground-level, elevated and rooftop decks are different projects
Elevated and walkout decks
Elevated plans should show the full load path, lateral support, ledger or freestanding design, footing depths and sizes, guards and stairs. Framing close to grade may need inspection before decking conceals it.
Rooftop decks
A roof deck can affect building-height measurement and is outside the standard deck-details path. Structural capacity, roof and waterproofing, access and egress, guards, zoning, fire and mechanical conflicts need coordinated review.
Local code requirements that shape the design
Montgomery County adopted local regulations based on the 2021 International Residential Code in January 2025, with Maryland modifications and county amendments. Confirm the current code set for the filing date.
The County's standard residential deck details are limited to qualifying single-span, single-level decks without a roof, screen enclosure, hot tub or other added load.
Permit path
- DPS states that every deck supported by footings needs a building permit regardless of height.
- Electrical lighting, receptacles or hot tubs require the applicable electrical review. Wells, septic systems, floodplain, stormwater or zoning conditions can change the site plan.
- Standard details cannot be used when the proposed structure is outside their span, level or loading limits.
Required inspections
- Footings are inspected before concrete placement.
- When framing is less than 36 inches above grade, DPS requires framing inspection before decking conceals the work.
- The final deck inspection must be approved before occupancy; the County's 2026 notice lists a $104.91 reinspection fee after two disapprovals.
Local conditions to confirm before design
- County versus Rockville or Gaithersburg jurisdiction
- Footing-supported decks require a permit at any height
- Low framing must remain visible for inspection
- Septic, well, stormwater, tree and HOA conditions
Official sources reviewed
Use these government sources to confirm the current rule for the exact address and proposed design:
- Montgomery County residential deck process
- Montgomery required deck inspections
- Montgomery current fee regulations
- Montgomery adopted 2021 IRC regulation
- Montgomery building-height guidance
Planning disclosure: This page summarizes public guidance reviewed on August 15, 2026 and is not a permit approval, engineering opinion, code ruling or fixed-price estimate.
Communities we serve
Bethesda, Silver Spring, Rockville, Gaithersburg, Kensington, Potomac, Wheaton and nearby Montgomery County communities. Service availability depends on the property’s location within the DC Decks 50-mile service area.
Frequently asked questions
Does Montgomery County require a deck permit?
Montgomery County states that decks supported by footings require a building permit regardless of height. Additional electrical, zoning, septic or municipal requirements may also apply.
Can county standard deck details be used?
The county says its residential deck details may be used for certain single-span, single-level decks without added loads. Eligibility depends on the proposed design and current county rules.
Can you resurface an existing Montgomery County deck?
Resurfacing may be appropriate when the framing and other retained components are suitable. The existing structure must be evaluated before that scope is recommended.
What areas of Montgomery County do you serve?
We serve communities within the DC Decks service radius, including Bethesda, Silver Spring, Rockville, Gaithersburg and surrounding areas.
How much does a deck cost in Montgomery County?
For early 2026 planning, DC Decks uses broad Washington-area construction allowances of $55–$90 per square foot for a straightforward ground-level wood deck, $75–$125 for ground-level composite or PVC, $75–$125 for elevated wood, and $95–$160 for elevated composite or PVC. Access, demolition, structure, stairs, rails, engineering, site work and selections can move the price outside those ranges. Government fees are separate.
Does a ground-level deck in Montgomery County need a permit?
A deck supported by footings requires a County permit even when it is close to grade. A patio and a framed deck are different structures, and setbacks, lot coverage, drainage and easements still matter.
What is different about a rooftop deck in Montgomery County?
A roof deck can affect building-height measurement and is outside the standard deck-details path. Structural capacity, roof and waterproofing, access and egress, guards, zoning, fire and mechanical conflicts need coordinated review.