Ductwork Replacement cost in Nampa, ID
Nampa, ID · updated August 2026
$5,300
Typical local cost
$2,400 – $11,700
Typical range
- per supply run
- $250 – $600
- Permit
- Yes
- Typical timeline
- 1-3 days of work
Installed, local pricing
$80 – $280 in fees
1-3 days of work, 1-3 weeks including permitting
Nampa runs -2% against the U.S. average · data confidence Medium · modeled estimate, not a quote
The modeled midpoint for Nampa is $5,300. The local adjustment for this trade is x0.976 — driven mainly by Canyon County labor rates and 55% exposure to local code requirements.
Estimate your Nampa job
Priced with this market's cost index, so the calculator, the size table and the ranges on this page all agree.
Recommended size
5 tons
Round to the nearest half ton
- Cooling load
- 61,000 BTU/hr
- Typical equipment costInstalled, 14-17 SEER2
- $8,296 – $15,616
- Rule-of-thumb check
- 400 sq ft per ton
Priced for Nampa (local adjustment x0.976).
Estimates only. Local pricing, site conditions and code requirements change the real number.
Cost by project size
Generated from the same unit pricing the calculator uses.
| Project size | Estimated range |
|---|---|
| 8 supply run | $2,000 – $4,800 |
| 10 supply run | $2,500 – $6,000 |
| 13 supply run | $3,300 – $7,800 |
| 17 supply run | $4,300 – $10,200 |
| 22 supply run | $5,500 – $13,200 |
Based on Nampa pricing of $250–$600 per supply run.
Where the money goes
- Labor
- $2,400
- 44% of median
- Materials
- $2,900
- 53% of median
- Permit & fees
- $180
- 3% of median
Nampa project costs-2% vs U.S. average
Based on Canyon County labor rates, local material logistics and permit-fee posture for this trade.
What the project looks like start to finish
Typical sequence for this scope. Timing varies with contractor backlog and plan-review queues.
01
Planning & quotes
Scope, material choice, contractor selection
02
Permit application
Filed with City of Nampa building department
03
Materials & staging
Order lead time on non-stock materials
04
Installation
1-3 days of work, 1-3 weeks including permitting
05
Inspection
Duct rough-in, Duct leakage test, Final mechanical inspection
06
Closeout
Final sign-off, warranty and documentation
Nampa labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$79–$103
HVAC crews in Canyon County · -5% vs U.S. ($95/hr)
Typical crew
2 × 1.5 days
On-site time for a typical ductwork job here.
Labor in the price
$2,400
45% of the median — the rest is material, disposal and permit.
Because labor is 45% of this job, Nampa wage levels move the price far more than material prices do. A quote well under this labor figure usually means a smaller crew, a longer schedule, or unlicensed help.
Basis: Hometriva labor model: national hvac crew rates adjusted by the Canyon County labor factor (x0.948). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Nampa differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates-$125
Canyon County crews price 5% below the national average, and labor is 45% of this job.
Permit fees-$25
Fees are paid to the jurisdiction, not the contractor, and are budgeted separately from the contract price.
Basis: Decomposition of the modeled Nampa median against the U.S. median for this scope. · City of Nampa building department, Hometriva methodology
Nampa vs Idaho vs the U.S.
Change the inputs, see your number
The same local model, run against your job instead of the average one.
Simulated ductwork replacement in Nampa
$5,480
Likely range $2,580 – $11,880
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Number of supply and return runs
- Flex duct versus rigid sheet metal
- Attic access and clearance
- Return air sizing corrections
- Removal of contaminated duct board
Who issues each permit
Tracked per discipline — the building permit issuer is not always the body that reviews electrical, plumbing, zoning or fire.
| Discipline | Issuing authority |
|---|---|
| building | City of Nampa building departmentModeled estimate |
| electrical | City of Nampa building departmentModeled estimate |
| mechanical | City of Nampa building departmentModeled estimate |
| plumbing | City of Nampa building departmentModeled estimate |
| zoning | City of Nampa building departmentModeled estimate |
| fire | City of Nampa building departmentModeled estimate |
Permit requirement in Nampa
Yes — a permit is required for ductwork replacement in Nampa, ID. The work must be inspected before it can be closed out, and a licensed contractor generally has to pull the permit.
- Permitting authority
- City of Nampa building departmentModeled estimate
- Permit fee
- Estimated allowance $80–$280Modeled from comparable fee schedules — not an official quoted fee.
Inspections
- Duct rough-in
- Duct leakage test
- Final mechanical inspection
Local conditions that change this job
Only the exposures that materially affect ductwork replacement.
Cooling load / heat exposure
Severe82/100
Humidity
Severe84/100
Nearby market comparison
| Market | Local factor | Median | Per supply run |
|---|---|---|---|
| Nampa (this page) | x0.976 | $5,300 | $250 – $600 |
| Meridian | x0.976 | $5,300 | $250 – $600 |
| Boise | x1.017 | $5,500 | $250 – $600 |
| Twin Falls | x0.942 | $5,100 | $250 – $550 |
What Nampa homeowners actually paid
Homeowner-reported invoices for this market. Nothing is published until enough reports clear review, so this section is often empty in newer markets — adding yours takes 20 seconds and no personal details.
Quotes homeowners were given in Nampa
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Nampa ductwork costs
Hometriva does not publish invented city prices. The Nampa estimate for ductwork replacement is produced by this chain, and every input is stored separately:
- National baseline$5,400
Typical U.S. cost for ductwork replacement on a single-family home.
- Local labor factorx0.948
Nampa-area trade labor rates, weighted at 45% of this job.
- Material factorx0.993
Material and delivery pricing into Canyon County, weighted at 55%.
- Regulatory factorx1.007
Local code, product-approval and inspection load, applied at 55% for this project type.
- Applied multiplierx0.976
Blended Nampa adjustment specific to ductwork replacement.
- Permit component$80 – $280
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, ductwork replacement in Nampa carries a different local adjustment than other trades in the same market.
Reviewed by
Hometriva Cost Data Desk
Maintains the unit-cost baselines, local adjustment factors and material pricing. Reviewed for ductwork replacement pricing in Nampa, ID.
- • National unit-cost baselines against current trade pricing
- • Local labor and materials factors for the market
- • Material installed-cost ranges and service life
Last reviewed August 2026 · Editorial standards · Report an error
Frequently asked questions
Do I need a permit for ductwork replacement in Nampa, ID?
In most jurisdictions this work is permitted and inspected. Requirements are set locally, so confirm the current application and inspection checklist with your building department before work starts.
How long does ductwork replacement take?
1-3 days of work, 1-3 weeks including permitting. Permit review and inspection scheduling are usually the largest source of variation.
What changes the price the most?
The largest cost drivers are number of supply and return runs; flex duct versus rigid sheet metal; attic access and clearance.
Sources
Sources & verification
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.