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Hiring a deck builder: 5 red flags and 10 questions, checked against deck permits in 17 cities

To hire a deck builder, check three things before you sign: a license or registration that covers decks in your state or city, a deck permit pulled in the builder's own name, and a permit history that mostly reaches a final inspection. In Columbus, Ohio, 146 firms pulled 624 deck permits in three years, 84.6% of those a year or more old reached a final, and the usual one was filed at $15,000. Most deck builders have very few permits on record, so the check takes five minutes and tells you a lot.

By Contractor Records · data through October 17, 2026

Who licenses deck builders in the states we cover

We hold deck permits for 17 cities in 13 states. Decks are carpentry, so in most states the general contractor or home-improvement rule decides whether there is a license to check.

State License or registration to ask for Look it up
California CSLB B General Building or C-5 Framing and Rough Carpentry. Unlicensed work is allowed only under $1,000 and only when no permit is needed (CSLB, AB 2622) CSLB Check a License
Colorado No state license. Colorado Springs: a PPRBD building contractor license PPRBD search
Illinois No state license (Illinois Attorney General); ask the village whether it registers contractors Your village's building department
Massachusetts Construction Supervisor License plus HIC registration for owner-occupied homes Contractor Hub
Minnesota DLI residential building contractor or remodeler license, unless the firm does only carpentry. DLI lists "porches and decks (excluding concrete footings)" under carpentry and "poured-in-place footings" under masonry and concrete, so a firm that pours the footings too needs the license DLI lookup
Missouri No state license; St. Louis requires a city contractor business license St. Louis business license search
North Carolina NCLBGC general contractor license for jobs of $40,000 or more NCLBGC search
North Dakota Secretary of State contractor license for jobs over $4,000 FirstStop search
Ohio No state license. Columbus: Home Improvement Limited contractor, a city license whose listed trades include decks Columbus contractor search
Oregon CCB license; carpentry is on the CCB's own list of work that needs one CCB search
Tennessee State contractor license at $25,000 and up; in Davidson County (Nashville), a home improvement license from over $3,000 to under $25,000 verify.tn.gov
Virginia DPOR Class C over $1,000 and under $30,000, Class B or A above that DPOR License Lookup
Washington L&I contractor registration: specialty ($15,000 bond) or general ($30,000) L&I Verify

The California rule catches people out. The $1,000 exemption holds only if "the work cannot require a permit", and a deck almost always needs one (CSLB industry bulletin, read 21 October 2026). So a "handyman" quoting a permitted deck in California needs a license whatever the price.

Ten questions to ask a deck builder, and how to check each answer

Ask A good answer How to check it
1. What is your license or registration number? A number in the business name, in a class that covers carpentry The board in the table above
2. Who pulls the permit? "We do, in our name" The permit on the city portal once issued
3. Which inspections will it get? Footings, framing and final (Columbus lists all three) The inspection list on the permit
4. How many decks have you permitted here in three years? A number The firm's page here; search by name
5. How many of those passed final? Near or above your city's share (table below) Finished share on the firm page
6. Who pours the footings? The firm, or a named sub In Minnesota, this decides whether a license is needed
7. How is the ledger attached to the house? Bolts or lag screws into the rim joist, with flashing, shown on the plan The framing plan filed with the permit
8. What is the deposit and payment schedule? Payments tied to inspections passed; in California no more than $1,000 or 10% down The contract
9. Who is your insurer? A certificate naming you, from an insurer you can call Phone the insurer
10. Can I see three decks you built in the last two years? Street addresses Look each one up on the city portal for a final

Questions 4 and 5 take about five minutes here. Deck builders often have only a handful of permits, so read every one.

What the deck permit record shows

City Deck permits Firms Usual filed value Middle half of firms' usual job Usual days to final Reached final Firms with one permit
Colorado Springs, CO 2,531 396 $10,000 $6,545–$15,000 54 not recorded 39.9%
San Francisco, CA 1,701 1,014 $22,000 $12,000–$80,000 237 83.4% 66.1%
Raleigh, NC 1,101 459 $29,000 $24,000–$53,481 not recorded not recorded 70.2%
Minneapolis, MN 692 338 $7,370 $4,500–$19,750 166 65.9% 70.7%
St. Louis, MO 703 438 $11,850 $7,000–$20,000 234 67.9% 81.7%
Columbus, OH 624 146 $15,000 $12,000–$21,028 51 84.6% 62.3%
Saint Paul, MN 465 269 $9,675 $5,976–$15,000 196 51.6% 76.6%
Arlington, VA 402 180 $18,500 $12,000–$27,000 61 96.3% 67.2%
Naperville, IL 348 152 $25,000 $24,990–$31,734 169 75.3% 70.4%
Greensboro, NC 226 112 $16,046 $11,000–$25,000 41 84.9% 72.3%
Bismarck, ND 191 78 $3,024 $2,646–$3,687 58 86.6% 61.5%

Some cities file decks with porches, stairs or patio covers, so the usual value is not a pure deck price. Compare a builder only with its own city.

Five red flags the permit record can show

1. The permit is in your name, or there is none. Columbus says it plainly: "Property owners cannot purchase permits for work that they will hire a contractor to perform" (Columbus BZS FAQ, read October 2026). The FTC lists a contractor asking you to get the permits among its scam signs. On the city portal the contractor field should name the builder.

2. The finished share is well below the city's. Arlington deck permits reached a final 96.3% of the time; Saint Paul's only 51.6% and Minneapolis's 65.9%. In the Twin Cities a low share is common, but a builder far under even those numbers is leaving decks uninspected. Ask about the open permits by address.

3. The license has lapsed. 31 Minneapolis deck firms and 28 in Saint Paul match a DLI license that is no longer active; in San Francisco 22 deck firms match a CSLB license in a non-active status. The firm page shows the status we matched; the board's own lookup is the live answer.

4. The price is far outside what neighbors file. In Columbus the middle half of deck firms usually file between $12,000 and $21,028; in San Francisco the range runs from $12,000 to $80,000, because some firms build stairs and porches and others build roof decks. A quote far below the range is a reason to ask what is left out.

5. The firm went quiet. 11 Colorado Springs deck firms with 5 or more permits filed none in the last 12 months of the window. A firm that stopped filing may have closed, moved, or started building without permits.

See every Columbus deck builder by finished share →

When to book

Deck permits follow the weather. Colorado Springs files the most in August (index 138, where 100 is an average month) and the fewest in January (index 56). Arlington peaks in August; Columbus in April. Getting quotes in winter puts you at the front of the spring queue.

What a clean record does not prove

A final inspection means the city saw footings, framing and guards that met code on the day. It does not cover the board grade, the stain, the hidden fasteners or how the deck weathers in five years, so get two warranties in writing: the builder's on workmanship, and the board maker's on composite or treated lumber, with any installation conditions it sets. Insurance never appears on a permit. Several of these cities record no final at all (Colorado Springs, Raleigh), so there the record tells you volume and price, not completion. Our copy updates about monthly; the city portal is the live record. For a deck or a patio, see deck vs patio.

How we know this

Counts, usual filed values and days to final come from each city's deck permits over its three-year window (Saint Paul July 2022 to June 2025; the others October 2023 to September 2026). "Reached final" is the share of permits a year or more old that the city closed with a final; days to final is the median from issue to final. The middle-half range uses firms with 3 or more deck permits. License status is matched by name to the state file where we hold one (California, Minnesota, Virginia, Washington, Oregon); in Columbus we match only the state OCILB trades, which do not cover decks. State rules are quoted from the boards and statutes under Sources, read 20 and 21 October 2026.

Numbers come from City of Columbus Building & Zoning Services permits on 1-, 2- and 3-family homes (the city's Accela permit layer); San Francisco DBI building permits on one- and two-family homes, with the contractor from the city's permit contacts file; Pikes Peak Regional Building Department permits inside Colorado Springs city limits; City of Minneapolis construction permits (CCS); City of Saint Paul approved building permits; Arlington County, VA building and trade permits; City of Naperville building permits (the current permit system plus the city's older records); City of Raleigh building permits, data through October 17, 2026. Nobody paid to be on this page and nobody can.

Questions

  • Does a deck builder need a license?

    It depends on the state and sometimes the city. California needs a CSLB license (B or C-5 framing) for any deck that needs a permit; Virginia needs a DPOR license above $1,000; Oregon a CCB license; Washington L&I registration. Columbus, Ohio licenses deck builders as Home Improvement Limited contractors. Minnesota exempts a firm that does only carpentry, but not one that also pours the footings.

  • Does a deck need a permit?

    Usually, yes, for any deck attached to the house or high off the ground. Columbus, for example, needs a building permit with a site plan, footing plan and framing plan, and inspects the footings, the framing and the final. Ask your own permit office for its size and height exemptions before you accept a builder's word.

  • How much does a deck cost?

    The usual filed value of a deck permit was $15,000 in Columbus, $10,000 in Colorado Springs, $18,500 in Arlington, Virginia and $22,000 in San Francisco. Filed values are what the contractor told the city, which is usually close to, but not the same as, the contract price.

  • How deep do deck footings have to go?

    The building department sets it, usually from local frost depth, so the answer is on your permit plan. Arlington County, Virginia, for example, requires a 24-inch minimum, wants elevation drawings for decks more than 4 ft high, and calls home-centre deck plans "generally not acceptable" (Arlington County, read October 2026). Columbus inspects the footings before any framing goes on. Ask for the depth on the plan, and be home for the footing inspection.

  • When should I book a deck builder?

    Early. Deck permits in Colorado Springs peak in August and bottom out in January; in Minneapolis they peak in May. Signing in winter gets you on the spring list and gives the permit office time before the rush.

  • Is a deck builder with only one permit a bad sign?

    Not by itself, but it means you have one job to check. 62.3% of the Columbus firms that filed a deck permit filed exactly one. Ask for addresses of other decks and look them up on the city portal.

Build your own list

Every firm with that kind of permit on record. Pick what you value. The list moves.

Columbus, OH deck & patioSan Francisco decks, stairs & porchesColorado Springs deck, patio cover & pergolaMinneapolis deck, porch & stoopSaint Paul deck, porch & stepsArlington, VA deck & porchNaperville deck, pergola & gazeboRaleigh deck

Related guides

For one city

All guides →

Sources
  1. Licensing Classifications — CSLB (accessed 2026-10-21)
  2. AB 2622 implementation: minor work exemption raised to $1,000 — CSLB industry bulletin (accessed 2026-10-21)
  3. Check a License — CSLB (accessed 2026-10-20)
  4. Who needs a license? — Minnesota DLI (accessed 2026-10-21)
  5. License and registration lookup — Minnesota DLI (accessed 2026-10-20)
  6. Contractor Licenses — City of Columbus Building and Zoning Services (accessed 2026-10-21)
  7. BZS Frequently Asked Questions — City of Columbus (accessed 2026-10-21)
  8. Search for Licensed & Registered Contractors — Columbus Citizen Access (accessed 2026-10-21)
  9. License/Registration Types — Pikes Peak Regional Building Department (accessed 2026-10-20)
  10. Contractor search — Pikes Peak Regional Building Department (accessed 2026-10-20)
  11. Home Repair and Construction: How to Choose a Contractor — Illinois Attorney General (accessed 2026-10-20)
  12. Learn about different Construction Supervisor Licenses — Mass.gov (accessed 2026-10-20)
  13. HIC contractor search — MA Contractor Hub (accessed 2026-10-20)
  14. St. Louis Business License Search — City of St. Louis License Collector (accessed 2026-10-20)
  15. Verify License Search — NC Licensing Board for General Contractors (accessed 2026-10-20)
  16. Contractors — North Dakota Secretary of State (accessed 2026-10-20)
  17. CCB License (Do You Need a License?) — Oregon CCB (accessed 2026-10-20)
  18. County Information Adopting the Home Improvement Law — Tennessee Commerce & Insurance (accessed 2026-10-20)
  19. Code of Virginia 54.1-1100 Definitions (Class A, B, C) (accessed 2026-10-20)
  20. Register as a Contractor — Washington L&I (accessed 2026-10-20)
  21. How To Avoid a Home Improvement Scam — FTC Consumer Advice (accessed 2026-10-20)
  22. Residential Building Permit — Arlington County (accessed 2026-10-20)