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Home Addition Cost in Denver, CO: what the permits say

How much does home addition cost in Denver? The usual addition job filed with Denver is $110,000, from 833 priced permits (October 2023 through September 2026); the middle half of firms file between $60,178 and $200,000. A filed value is what the contractor wrote on the permit, not a quote or the final bill.

$110,000usual filed value
$60,178–$200,000middle half of firms' usual jobs
833priced permits (96% of 864)
393firms on file
Sep 2026records through

How much does home addition cost in Denver?

The usual addition job filed with Denver is $110,000, from 833 priced permits, October 2023 through September 2026. The middle half of firms usually file between $60,178 and $200,000. Half of jobs were filed for less, half for more. A filed value is what the contractor wrote on the permit, not a quote or the final bill.

What the spread looks like

Approximately, from each firm's own spread: every firm's range of filed values, weighted by its 833 priced permits across 383 firms, pooled into one. Half of Denver addition permits were filed between $49,100 and $250,000.

PercentileFiled valueReads as
10th$20,0001 in 10 permits filed below
25th$49,1001 in 4 filed below
50th$117,000the middle permit
75th$250,0001 in 4 filed above
90th$411,0001 in 10 filed above

By home value

Firms split into thirds by the usual value of the homes they work on, with each third's usual filed value weighted by permits. Home values: City and County of Denver parcel values.

Firms working onUsual home valueUsual filed valueFirmsPermits
Lower thirdunder $826,800$80,250126252
Middle third$826,800–$1,274,250$115,000126335
Upper third$1,280,250 and up$165,041127259

Busiest firms and what they usually charge

Top 10 by permits in the last 12 months. Usual is each firm's middle filed value; middle half is the range its middle half of jobs were filed in. Busy is not the same as careful: pick what you value to build a list.

FirmPermitsLast 12 moUsualMiddle half
TWO18 Construction LLC109$60,178$39,536–$81,248
PR Builders99$158,000$116,250–$193,750
A2Z Builders, LLC178$87,100$30,423–$121,500
Lujan Investment Group & Home Improvement LLC148$161,531$60,000–$200,000
Wedoit Builders LLP76$84,000$50,488–$133,017
Davis Investments, LLC115$87,500$62,500–$120,000
Larraz Building Excellence Inc105$105,000$90,000–$278,750
Coggeshall Construction Inc85$512,000$465,000–$735,500
Performance Construction55$33,706$25,000–$45,000
Ascent Contracting Inc94$341,417$90,000–$385,000

Why filed values run low or high

  • The 10 busiest firms usually file $87,500; the 375 firms with fewer than 10 permits usually file $135,000.
  • Firms working on the most expensive third of homes (usual home value $1,280,250 and up) usually file $165,041, against $80,250 for the least expensive third.
  • One permit type covers small and large jobs: 1 in 10 addition permits is filed under $20,000 and 1 in 10 over $411,000, 21 times as much.
  • 96.4% of the 864 permits carry a value; the 31 without one are left out of every figure here.

Is your quote normal? Compare it with 833 filed values

Line your quote up against the file. In Denver, 1 in 10 addition filed values sit under $20,000, the middle half between $49,100 and $250,000, and 1 in 10 over $411,000.

  • $534,000Above $411,000: higher than 9 in 10 filed values for this work in Denver.
  • $110,000Right at the usual $110,000: in the middle of the file.
  • $14,000Below $20,000: lower than 9 in 10. Ask what the quote leaves out.

When to schedule a home addition in Denver

Denver files the fewest addition permits in December (67 against an average month of 100) and the most in April (136). If you can choose, ask for quotes in a quiet month. We have no prices by month, so this is about crews' schedules, not a discount. When each trade is busiest in Denver →

How these numbers are made

Source: City and County of Denver residential construction and demolition permits. The window is October 2023 through September 2026; a permit filed after that isn't here yet.

Usual is the middle permit: half were filed for less, half for more. Only permits with a filed value count; a value of $0 or none is left out.

The spread is approximate: we keep seven points of each firm's own range of filed values, not every permit, and pool them.

Nobody paid to be on this page and nobody can. How the records work in Denver →

Common questions

  • How many quotes should I get for an addition job in Denver?At least three. In the permit record the middle half of Denver addition firms usually file between $60,178 and $200,000 a job, so two ordinary firms can sit 3.3 times apart and both be normal for Denver. A third quote shows which one is the outlier. Filed values are what contractors wrote on permits, not quotes, so use them to judge the spread, not to price your own job.
  • What range is normal for addition jobs in Denver?Half of permits were filed between $49,100 and $250,000; 8 in 10 between $20,000 and $411,000. These are approximate, pooled from each firm's own spread.
  • How much do home addition contractors charge in Denver?The usual addition job is filed at $110,000; the middle half of firms usually file between $60,178 and $200,000. The 10 firms with the most permits in the last 12 months usually file $87,500, less than the usual. See every firm's usual job →
  • Why do prices I see online differ from $110,000?$110,000 is the construction value contractors wrote on Denver permits. Online figures are usually all-in ranges whose scope you can't check (design, fees, site work), and our file mixes small and large jobs of this type in one number. Use the spread above to see where a quote sits.
  • Do bigger houses get bigger bills?In the file, yes for the firms: those working on the upper third of homes by value usually file $165,041, the lower third $80,250. That is firms, not single jobs.
  • Where does this data come from?City and County of Denver residential construction and demolition permits, read October 2026. How the records work in Denver →

Addition cost in other cities: Orlando Cincinnati Miami Minneapolis San Diego Honolulu Albuquerque Boulder Greensboro Saint Paul Arlington, VA Scottsdale Somerville Cary Naperville Bellevue Cape Coral Bellingham Bend San Francisco Anaheim Columbus, OH Marin County (unincorporated)

Other job costs in Denver: Remodel & Alteration · New Home · Demolition · Garage · Foundation & Structural Repair · Pool, Shed & Outdoor Structure · ADU