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Dupont LLCDeck builder in Washington, D.C., DC

Dupont LLC is a deck builder at 1431 21st St NW, Washington, DC 20036, ranked #28 of 476 deck builders in Washington, D.C. and rated 4.5 from 8 Google reviews. Open Monday to Saturday.

Washington, D.C., DCUpdated 0 paid placements in any rankingHow we rank

Call (202) 774-9128Website ↗

Key facts

Key facts about Dupont LLC
Address1431 21st St NW, Washington, DC 20036, Washington, D.C., DCGet directions
Phone(202) 774-9128
Websitedupontdeckspatiosdc.com
HoursMonday to Saturday: 8 AM – 5 PM
Google rating4.5 from 8 Google reviews

Trades

Each trade shows the evidence we matched it on.

Service area

Serves Washington, D.C. and 3 towns within 25 miles: Adams Morgan, Shaw and Chevy Chase.

Based in Washington, D.C., DCView on map

Opening hours

Opening hours for Dupont LLC
DayHours
Monday8 AM – 5 PM
Tuesday8 AM – 5 PM
Wednesday8 AM – 5 PM
Thursday8 AM – 5 PM
Friday8 AM – 5 PM
Saturday8 AM – 5 PM
SundayClosed
  • Open evenings — no
  • Open Saturdays
  • Open Sundays — no

Typical deck and patio building prices

Typical deck and patio building prices
JobLowTypicalHigh
Deck buildingPer deck: typical range of customer-reported projects. US national range × 1.01 South Atlantic factor (2025 Cost vs. Value Report)$4,370$8,380$12,750

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby deck builders

Dupont LLC compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Dupont LLC (this business)—564.5 (8)—YesNo
G&J General Contractors LLC#26565.0 (34)—YesNo12.5 mi
Bethesda Best Construction#27565.0 (4)—YesYes2.8 mi
Windshield Replacement and Auto Glass Repair DC#29554.3 (98)—YesYes2.7 mi

See all 476 ranked deck builders in Washington, D.C.

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.5from 8 Google reviews

Hired Dupont LLC? Write a review

Questions about Dupont LLC

How is Dupont LLC ranked in Washington, D.C.?

Dupont LLC is ranked #28 of 476 deck builders in Washington, D.C. by CR Score, with 56 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are Dupont LLC’s hours?

Dupont LLC is open Monday to Saturday. Its listed hours are Monday to Saturday, 8 AM – 5 PM. On Saturdays it is open 8 AM to 5 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Dupont LLC serve?

Serves Washington, D.C. and 3 towns within 25 miles: Adams Morgan, Shaw and Chevy Chase. The list is based on the business's location and the usual service radius for deck and patio building. Confirm your address is covered when you call.

What do Google reviews say about Dupont LLC?

Dupont LLC has a rating of 4.5 from 8 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Dupont LLC?

Call Dupont LLC on (202) 774-9128. The business is at 1431 21st St NW, Washington, DC 20036, Washington, D.C., DC. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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