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DC Retaining Wall Permit Cost (2026)

Residential retaining wall permit fees in Washington, DC, pulled from the DC Department of Buildings (DOB) Building Permit Fee Schedule at dob.dc.gov/node/1620346 (live schedule captured April 25, 2026 - DC publishes the schedule on a single live page, not a dated PDF). DC prices retaining walls under the Section a "Retaining wall, tank, tower" line item at $46.00 per $1,000 of construction cost, with the universal 10% DOB Enhanced Fee applied on top. The arithmetic scales with the declared construction cost: all-in = (construction cost / 1,000) x $46 x 1.10. A $10,000 retaining wall works out to 10 x $46 = $460 base + $46 Enhanced (10%) = $506.00 all-in. There is no Green Building Fee on the discrete retaining wall line item (the DC Green Building Fee applies to alterations and to per-square-foot new construction, not to the retaining wall/tank/tower line). There is no DC equivalent of the Virginia 2% state levy because DC is a federal district, not part of any state. DOB collects a filing deposit at application equal to 50% of the assessed permit fee (capped at $20,000, plus 10% Enhanced), but that deposit is generally credited toward the final permit fee at issuance - it is a cash-flow/timing item, not an extra permanent cost.

Base Permit Rate
$46 per $1,000 (Section a)
10% DOB Enhanced Fee
x 1.10 on base
$10,000 Wall All-In
$506.00
Green Building Fee
N/A on this line item
State / Local Surcharges
10% Enhanced only
Fee Status
Verified April 2026
What This Guide Covers - and What It Does Not

This guide covers: Washington, DC residential retaining wall permit fees as published in the DC Department of Buildings (DOB) Building Permit Fee Schedule on dob.dc.gov/node/1620346 (live schedule captured April 25, 2026). Coverage includes the Section a "Retaining wall, tank, tower" rate of $46.00 per $1,000 of construction cost; the universal 10% DOB Enhanced Fee applied to all DOB fees; the resulting all-in math ((construction cost / 1,000) x $46 x 1.10); the 50% filing deposit collected at application (capped $20,000, credited at issuance); and how DC's per-$1,000 retaining wall approach contrasts with the value-based and flat-fee approaches used by Virginia neighbors. DC requires a DOB construction permit for retaining walls on private property priced under this line item.

This guide does NOT cover: The contractor, excavation, backfill, drainage, or material costs to build the wall (block, timber, stone, or poured concrete) - the permit fee is a small fraction of total project cost; structural or geotechnical engineering design fees (taller or tiered walls typically require stamped engineering, which is a separate professional cost); public space / right-of-way work, tree-box, or sidewalk retaining structures - retaining structures in public space require a separate DDOT (District Department of Transportation) public space permit, NOT this DOB building permit; the Green Building Fee, which does not apply to the discrete retaining wall line item; trade permits (electrical, plumbing, mechanical) if lighting, drainage pumps, or other systems are added - those are separate Section d filings with their own 10% Enhanced Fee; zoning approvals (lot occupancy, setback, and grading rules); historic preservation review (HPRB approval may be required before permit application for any structure in a DC historic district).

Note on the Enhanced Fee: Every DOB fee carries a 10% Enhanced Fee on top of the base amount per Section a of the fee schedule. The Enhanced Fee is DC's automation and technology surcharge equivalent and applies to building permits, plan review, supplemental permits, and trade permits. For a $10,000 retaining wall the base permit fee is $460 and the Enhanced Fee is $46, yielding $506.00 all-in. The Enhanced Fee is mandatory and not negotiable.

Note on the rounding ambiguity (disclosed): The DOB schedule states "$46 per $1,000 of construction cost" but does not publish whether DOB rounds the construction cost up to the next full $1,000 or prorates the in-between amount. The worked examples in this guide use round $1,000 multiples ($5,000, $10,000, $20,000) precisely to avoid this ambiguity, so those figures are exact arithmetic from the published rate. For an in-between construction cost, the fee may be prorated or may be rounded up to the next full $1,000 - confirm the rounding method with DOB at filing. See the rounding example below.

Key Takeaways
  • DC prices a residential retaining wall permit at $46.00 per $1,000 of construction cost under the Section a "Retaining wall, tank, tower" line item, plus the universal 10% DOB Enhanced Fee on top. The all-in formula is (construction cost / 1,000) x $46 x 1.10.
  • Worked round-thousand figures: a $5,000 wall is $253.00 all-in (5 x $46 = $230 + $23 Enhanced); a $10,000 wall is $506.00 all-in ($460 + $46 Enhanced); a $20,000 wall is $1,012.00 all-in ($920 + $92 Enhanced). These use round $1,000 multiples so the arithmetic is exact.
  • No Green Building Fee applies to the discrete retaining wall line item. The DC Green Building Fee applies only to alterations and repairs and to per-square-foot new construction - not to the Section a retaining wall/tank/tower line.
  • There is no Virginia 2% state levy in DC. DC is a federal district, not part of any state, and operates under DCMR Title 12-A (Construction Codes Supplement of 2017, as amended). The 10% DOB Enhanced Fee is the only universal surcharge on the retaining wall permit.
  • The DOB filing deposit (50% of the assessed permit fee at application, capped at $20,000, plus 10% Enhanced) is generally credited toward the final permit fee at issuance. It is a cash-flow/timing item, not an additional permanent cost on top of the all-in fee.
  • Retaining structures in public space, the tree box, or the right-of-way require a separate DDOT public space permit - NOT this DOB building permit. The $46 per $1,000 rate applies to retaining walls on private property only.
  • Rounding ambiguity is disclosed: the schedule states "$46 per $1,000 of construction cost" but does not publish whether DOB rounds construction cost up to the next full $1,000 or prorates it. The worked examples use round $1,000 multiples to avoid this; for in-between values the fee may be rounded up.
  • Verification: the figures above come from the DOB Building Permit Fee Schedule at dob.dc.gov/node/1620346, a live page (no stamped effective date) captured April 25, 2026 and re-verified quarterly. Confirm scope and rounding with DOB before filing.
Calculate Your Permit Fee All Washington DC Permit Fees

DC Retaining Wall Permit Fee Components

DC's retaining wall permit fee has two components: the Section a base rate of $46.00 per $1,000 of construction cost, and the universal 10% DOB Enhanced Fee applied to all DOB fees. Because the base scales with declared construction cost and the Enhanced Fee is a fixed percentage of that base, the all-in fee grows with the size and value of the wall. The breakdown below uses a $10,000 retaining wall to show the component math.

Component Amount How It Is Calculated
Base permit fee (Section a, retaining wall) $460.00 $10,000 / $1,000 x $46
10% DOB Enhanced Fee $46.00 10% of $460
All-in $10,000 retaining wall permit $506.00 $460 + $46

No Green Building Fee applies to the retaining wall line item; no Virginia state levy (DC is a federal district). Source: DC Department of Buildings Building Permit Fee Schedule, Section a ("Retaining wall, tank, tower"), live schedule at dob.dc.gov/node/1620346 captured April 25, 2026. The 10% Enhanced Fee is required per Section a of the same fee schedule and applies to every DOB fee. A filing deposit equal to 50% of the assessed permit fee (capped at $20,000, plus 10% Enhanced) is collected at application but is generally credited toward the final permit fee at issuance, so it is not shown as an additional row above. The schedule states "$46 per $1,000 of construction cost" but does not publish whether DOB rounds construction cost up to the next full $1,000 or prorates it - this $10,000 example uses a round $1,000 multiple so the arithmetic is exact. Trade permit fees (electrical, plumbing, mechanical) are filed separately under Section d and are excluded from this component breakdown.

Worked Examples - Real Retaining Wall Projects in Washington DC

DC's retaining wall permit fee scales with declared construction cost at $46 per $1,000, plus the 10% DOB Enhanced Fee. The three examples below use round $1,000 multiples ($5,000, $10,000, $20,000) so the arithmetic is exact and avoids the published schedule's unstated rounding method. The fourth example illustrates the rounding ambiguity itself using an in-between value, clearly labeled as approximate.

Example 1: $5,000 segmental block wall

A homeowner installs a segmental concrete block retaining wall along a sloped back yard. Declared construction cost on the permit application: $5,000. The wall is on private property (not in public space), so the DOB Section a retaining wall line item applies.

  • Construction cost: $5,000 (a round $1,000 multiple)
  • Base permit fee: 5 x $46 = $230.00
  • 10% DOB Enhanced Fee: $23.00
  • Total: $253.00 all-in

Note: a 50% filing deposit ($126.50 here, plus 10% Enhanced) would be collected at application but credited toward this $253.00 final fee at issuance. The $253.00 covers the DOB building permit only - it does not include the contractor cost to build the wall, drainage, backfill, or any required engineering. If the wall is in public space or the tree box, a separate DDOT public space permit applies instead.

Example 2: $10,000 engineered timber wall

A homeowner builds an engineered timber (railroad-tie-style) retaining wall to terrace a steeper grade, with stamped engineering for the wall height. Declared construction cost on the permit application: $10,000. Private property, so the DOB Section a retaining wall line item applies.

  • Construction cost: $10,000 (a round $1,000 multiple)
  • Base permit fee: 10 x $46 = $460.00
  • 10% DOB Enhanced Fee: $46.00
  • Total: $506.00 all-in

Note: this is the headline $506.00 figure used throughout this guide. The structural engineering needed for a taller timber wall is a separate professional cost, not part of the permit fee. No Green Building Fee applies to this line item. The same $10,000 declared value would price at $459.00 in Fairfax County and $116.28 in Chesterfield County.

Example 3: $20,000 large tiered structural wall

A homeowner builds a large tiered structural retaining wall (multiple courses with engineered drainage and geogrid reinforcement) to stabilize a significant slope. Declared construction cost on the permit application: $20,000. Private property, so the DOB Section a retaining wall line item applies.

  • Construction cost: $20,000 (a round $1,000 multiple)
  • Base permit fee: 20 x $46 = $920.00
  • 10% DOB Enhanced Fee: $92.00
  • Total: $1,012.00 all-in

Note: a $20,000 wall illustrates how DC's per-$1,000 rate scales linearly - double the construction cost, double the permit fee. A 50% filing deposit ($506 here, plus 10% Enhanced) would be collected at application and credited at issuance. The engineering, drainage, and reinforcement for a tiered wall at this scale are separate professional and material costs, not part of the $1,012.00 permit fee.

Example 4: $6,500 in-between value (rounding ambiguity, approximate)

A wall with a declared construction cost that is NOT a round $1,000 multiple shows why the schedule's unstated rounding method matters. Declared construction cost: $6,500. The published schedule does not state whether DOB prorates the in-between amount or rounds it up to the next full $1,000, so both outcomes are shown and clearly labeled approximate.

  • Construction cost: $6,500 (an in-between value)
  • If prorated: 6.5 x $46 x 1.10 ≈ $328.90 all-in (approximate)
  • If rounded up to the next $1,000 ($7,000): 7 x $46 x 1.10 ≈ $354.20 all-in (approximate)

Note: both figures are approximate because the DOB schedule does not publish its rounding method for in-between construction costs. The round-thousand examples above ($5,000, $10,000, $20,000) avoid this ambiguity entirely and are exact. For any in-between declared value, confirm the rounding method with DOB at filing before budgeting.

Calculate Your Washington DC Retaining Wall Permit

DC's per-$1,000 retaining wall formula is documented here with worked examples. The PermitPrice calculator covers DC's flat-rate permit types directly; DC's value-scaled formulas - including the retaining wall rate of $46 per $1,000 of construction cost - are documented on this page with worked examples rather than returned as a live calculator output. To estimate your own wall, take your declared construction cost, divide by $1,000, multiply by $46, then multiply by 1.10 for the Enhanced Fee. For a $10,000 wall that is $506.00 all-in. Use the calculator for DC's flat-rate project types and the worked examples above for the value-scaled retaining wall fee.

Rule of thumb for DC retaining walls: budget $46 per $1,000 of construction cost plus the 10% DOB Enhanced Fee - a $10,000 wall is $506.00 all-in. Confirm scope with DOB at filing, and remember that a wall in public space or the tree box is a separate DDOT public space permit, not this DOB building permit.

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Filing Deposit, Public Space Permits & Exclusions

Filing deposit (credited, not extra): DOB collects a filing deposit at application equal to 50% of the assessed permit fee, capped at $20,000, plus the 10% Enhanced Fee on that deposit. For a $10,000 retaining wall whose all-in fee is $506.00, the deposit would be roughly half of the assessed fee at application. This deposit is generally credited toward the final permit fee at issuance - it is a cash-flow and timing item, not an additional permanent cost stacked on top of the all-in figure. Budget for the deposit at application, but the all-in fee remains the per-$1,000 base plus 10% Enhanced.

Public space / DDOT permits (a different permit entirely): The $46 per $1,000 DOB rate applies to retaining walls on private property. Retaining structures in public space - in the tree box, along the sidewalk, or in the right-of-way - require a separate public space permit from the District Department of Transportation (DDOT), NOT this DOB building permit. If any part of your wall is in or supporting public space, confirm the correct permit path with DOB and DDOT before filing.

Scope exclusions: The per-$1,000 permit fee is the DOB building permit only. It does not include the contractor cost to build the wall, excavation, backfill, drainage, or materials (block, timber, stone, or poured concrete); structural or geotechnical engineering design fees for taller or tiered walls; the Green Building Fee (which does not apply to this line item); or trade permits (electrical, plumbing, mechanical) under Section d, each with its own 10% Enhanced Fee, if lighting or drainage systems are added. Historic preservation review (HPRB) is a separate process required before filing for properties in DC historic districts. Confirm all scope with DOB at 202-671-3500 or through the Scout portal at scout.dob.dc.gov before budgeting.

Retaining Wall Permit Cost Across Verified Jurisdictions ($10,000 Wall)

The three jurisdictions below all have a verified retaining wall permit fee method, priced here on a constant $10,000 declared construction value. DC uses a per-$1,000 rate, Fairfax uses a percentage-of-value method with a separate plan review line and the Virginia 2% state levy, and Chesterfield uses a flat building permit fee plus the 2% levy. At $10,000 the three methods produce very different outcomes.

Jurisdiction Fee Method $10,000 Wall All-In
Washington, DC $46 per $1,000 of cost + 10% Enhanced $506.00
Fairfax County 3% of value + 50% plan review + 2% levy $459.00
Chesterfield County Flat $114 building permit + 2% levy $116.28

At a $10,000 declared value DC's per-$1,000 rate produces the highest fee of the three verified jurisdictions; Chesterfield's flat fee is the lowest. See the full picture in the Virginia Retaining Wall Permit Cost Guide. Methods differ - DC scales by construction cost per $1,000, Fairfax by a percentage of value with a separate plan review line plus the Virginia 2% state levy, and Chesterfield by a flat building permit plus the 2% levy - so the same $10,000 declared value produces three different all-in figures. DC carries no Virginia state levy because it is a federal district.

DMV Comparison Math

For a full DC permit fee breakdown across all residential project types, see the DC jurisdiction page.

Frequently Asked Questions

A residential retaining wall permit in Washington, DC is priced at $46.00 per $1,000 of construction cost under the Section a "Retaining wall, tank, tower" line item of the DOB Building Permit Fee Schedule, plus the universal 10% DOB Enhanced Fee on top. The all-in formula is (construction cost / 1,000) x $46 x 1.10. A $5,000 wall is $253.00 all-in, a $10,000 wall is $506.00 all-in, and a $20,000 wall is $1,012.00 all-in. These figures use round $1,000 multiples so the arithmetic is exact. The permit fee covers the DOB building permit only - not the contractor cost to build the wall, drainage, or any required engineering.
Take your declared construction cost, divide by $1,000, and multiply by $46 to get the base permit fee. Then multiply the base by 1.10 to add the 10% DOB Enhanced Fee. For a $10,000 wall: $10,000 / $1,000 = 10; 10 x $46 = $460 base; $460 x 1.10 = $506.00 all-in. The schedule states "$46 per $1,000 of construction cost" but does not publish whether DOB rounds the construction cost up to the next full $1,000 or prorates an in-between amount - so for values that are not round $1,000 multiples, the fee may be prorated (a $6,500 wall is approximately $328.90) or rounded up to the next $1,000 (approximately $354.20). Confirm the rounding method with DOB at filing.
No. The DC Green Building Fee does not apply to the discrete Section a "Retaining wall, tank, tower" line item. The Green Building Fee applies only to alterations and repairs and to per-square-foot new construction - not to the retaining wall/tank/tower line. For a retaining wall, the only universal surcharge on top of the $46 per $1,000 base is the 10% DOB Enhanced Fee. That is why a $10,000 wall is $506.00 all-in ($460 base + $46 Enhanced) with no Green Building Fee added.
No. There is no Virginia 2% state levy in Washington, DC. DC is a federal district, not part of any state, and operates under DCMR Title 12-A (Construction Codes Supplement of 2017, as amended) rather than the Virginia Uniform Statewide Building Code. The 10% DOB Enhanced Fee is the only universal surcharge applied to the retaining wall permit. By contrast, the Virginia jurisdictions in the comparison table (Fairfax County and Chesterfield County) both add the 2% Virginia state levy to their permit fees.
DOB collects a filing deposit at application equal to 50% of the assessed permit fee, capped at $20,000, plus the 10% Enhanced Fee on that deposit. It is not an additional permanent cost - the deposit is generally credited toward the final permit fee at issuance. In other words, it is a cash-flow and timing item: you pay roughly half of the assessed fee up front at application, and that amount is applied against the final fee when the permit is issued. For a $10,000 wall whose all-in fee is $506.00, the deposit at application is roughly half of the assessed fee, then credited at issuance. The all-in cost remains the per-$1,000 base plus the 10% Enhanced Fee.
Yes. The $46 per $1,000 DOB building permit rate applies to retaining walls on private property. A retaining structure in public space - in the tree box, along the sidewalk, or in the right-of-way - requires a separate public space permit from the District Department of Transportation (DDOT), NOT this DOB building permit. If any part of your wall is in or supporting public space, confirm the correct permit path with both DOB and DDOT before filing, because the fee structure and review process are different from the private-property DOB permit.
On a constant $10,000 declared construction value, DC's per-$1,000 rate produces the highest fee of the three verified jurisdictions at $506.00 all-in. Fairfax County comes in at $459.00 (3% of value plus a 50% plan review line plus the 2% Virginia state levy), and Chesterfield County is the lowest at $116.28 (a flat $114 building permit plus the 2% levy). The methods are structurally different, so the ranking can change at other declared values. For the full multi-jurisdiction picture, see the Virginia Retaining Wall Permit Cost Guide.
No. The $46 per $1,000 fee (plus 10% Enhanced) is the DOB building permit only. It does not include the contractor cost to build the wall, excavation, backfill, drainage, or materials (segmental block, timber, stone, or poured concrete). It also does not include the structural or geotechnical engineering design fees that taller or tiered walls typically require - those are separate professional costs. The "construction cost" you declare on the permit application is the basis for the per-$1,000 fee calculation, but the permit fee itself is only a small fraction of the total project cost. For a $10,000 wall the DOB permit is $506.00 all-in; the wall itself costs the declared $10,000 to build, separately.

Sources

Official .gov Sources - Verified April 2026
  • DC Department of Buildings - Building Permit Fee Schedule Live page captured April 25, 2026 - DC Department of Buildings - Primary source for the "Retaining wall, tank, tower" line item under Section a ($46.00 per $1,000 of construction cost) and the universal 10% DOB Enhanced Fee that applies to every DOB fee. No stamped effective date - DC publishes the schedule on a single live page, re-verified quarterly.
  • DC Department of Buildings - Permitting in the District of Columbia Accessed May 2026 - DC Department of Buildings - General permitting reference page covering DCMR Title 12-A (Construction Codes Supplement of 2017, as amended), the filing deposit and issuance process, historic preservation review, and the relationship between DOB private-property permits and DDOT public space permits.
Next Step

Calculate your DC permit cost, see all DC fee categories, or compare retaining wall fees across jurisdictions.

Always verify current retaining wall permit fees, the rounding method for in-between construction costs, the filing deposit and issuance process, public space (DDOT) permit requirements, and historic preservation review directly with the DC Department of Buildings before budgeting or filing. This guide is informational and is not a substitute for confirmation from your local building department - verify with your local building department before relying on any figure. The DOB Building Permit Fee Schedule at dob.dc.gov/node/1620346 is a live page (no stamped effective date) that may update without notice and is the source of truth for this guide; it is re-verified quarterly. Call DOB at 202-671-3500 or use the Scout portal at scout.dob.dc.gov to confirm the $46-per-$1,000 Section a path applies to your specific wall, to verify whether DOB prorates or rounds up an in-between construction cost, to confirm the filing deposit and credit at issuance, to check whether a separate DDOT public space permit is required, and to determine whether HPRB historic preservation review is required for your address.
Disclaimer: All fee information on PermitPrice is for informational purposes only and is not an official permit quotation. Actual permit fees are determined by the DC Department of Buildings at the time of application. The $46.00 per $1,000 of construction cost rate plus the 10% DOB Enhanced Fee is sourced from the DOB Building Permit Fee Schedule, Section a ("Retaining wall, tank, tower") at dob.dc.gov/node/1620346, captured live on April 25, 2026. The DOB schedule is a live page with no stamped effective date and may update without notice. The worked $5,000 ($253.00), $10,000 ($506.00), and $20,000 ($1,012.00) figures use round $1,000 multiples and are exact arithmetic from the published rate; the $6,500 figures ($328.90 prorated or $354.20 rounded up) are approximate because the schedule does not publish its rounding method for in-between construction costs. The filing deposit (50% of assessed fee, capped $20,000, plus 10% Enhanced) is collected at application and generally credited toward the final permit fee at issuance, not an additional permanent cost. The Green Building Fee does NOT apply to the discrete retaining wall line item. No Virginia state levy applies (DC is a federal district). Retaining structures in public space require a separate DDOT public space permit. The Virginia comparison figures (Fairfax $459.00, Chesterfield $116.28) are derived from each jurisdiction's published fee method and are estimates for the stated $10,000 scope.

Written by: Munib Ur Rehman

Data verified against official fee schedule documents.