Attic Insulation cost in Round Rock, TX
Round Rock, TX · updated August 2026
$2,700
Typical local cost
$1,200 – $7,300
Typical range
- per sq ft of attic floor
- $1 – $4.50
- Permit
- Usually no
- Typical timeline
- 1 day of work
Installed, local pricing
$0 – $145 in fees
1 day of work
Round Rock runs -3% against the U.S. average · data confidence Medium · modeled estimate, not a quote
Most Round Rock homeowners pay around $2,700. The local adjustment for this trade is x0.971 — driven mainly by Williamson County labor rates and 5% exposure to local code requirements.
Estimate your Round Rock job
Priced with this market's cost index, so the calculator, the size table and the ranges on this page all agree.
Square footage
180 sq ft
- With waste allowance
- 198 sq ft
- Square yards
- 20
- Perimeter (per area)
- 54 ft
- Square meters
- 16.72
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 |
|---|---|
| 600 sq ft of attic floor | $600 – $2,700 |
| 800 sq ft of attic floor | $800 – $3,600 |
| 1,000 sq ft of attic floor | $1,000 – $4,500 |
| 1,300 sq ft of attic floor | $1,300 – $5,900 |
| 1,700 sq ft of attic floor | $1,700 – $7,700 |
Based on Round Rock pricing of $1–$5 per sq ft of attic floor.
Where the money goes
- Labor
- $900
- 32% of median
- Materials
- $1,800
- 65% of median
- Permit & fees
- $75
- 3% of median
Round Rock project costs-3% vs U.S. average
Based on Williamson 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
Scheduling
No permit typically required for this scope
03
Materials & staging
Order lead time on non-stock materials
04
Installation
1 day of work
05
Closeout
Final sign-off, warranty and documentation
Round Rock labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$70–$91
Energy crews in Williamson County · -6% vs U.S. ($85/hr)
Typical crew
2 × 0.5 days
On-site time for a typical insulation job here.
Labor in the price
$900
35% of the median — the rest is material, disposal and permit.
Because labor is 35% of this job, Round Rock 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 energy crew rates adjusted by the Williamson County labor factor (x0.935). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Round Rock differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates-$75
Williamson County crews price 6% below the national average, and labor is 35% of this job.
Basis: Decomposition of the modeled Round Rock median against the U.S. median for this scope. · City of Round Rock building department, Hometriva methodology
Round Rock vs Texas vs the U.S.
Change the inputs, see your number
The same local model, run against your job instead of the average one.
Simulated attic insulation in Round Rock
$2,775
Likely range $1,275 – $7,375
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Attic square footage and existing R-value
- Blown cellulose or fiberglass versus spray foam
- Air sealing of penetrations before insulating
- Attic access and headroom
- Removal of contaminated existing insulation
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 Round Rock building departmentModeled estimate |
| electrical | City of Round Rock building departmentModeled estimate |
| mechanical | City of Round Rock building departmentModeled estimate |
| plumbing | City of Round Rock building departmentModeled estimate |
| zoning | City of Round Rock building departmentModeled estimate |
| fire | City of Round Rock building departmentModeled estimate |
Permit requirement in Round Rock
Usually no permit is required in Round Rock, but zoning rules such as setbacks and HOA approval can still apply.
- Permitting authority
- City of Round Rock building departmentModeled estimate
- Permit fee
- Estimated allowance $0–$145Modeled from comparable fee schedules — not an official quoted fee.
Local conditions that change this job
Only the exposures that materially affect attic insulation.
Cooling load / heat exposure
Severe82/100
Solar irradiance
Severe82/100
Humidity
Severe84/100
Round Rock sits in Williamson County, Texas. Hail and high straight-line winds are the dominant loss driver, so impact-rated roofing and insurance-funded replacement shape local pricing. Work outside city limits is permitted by the county building department rather than the city.
Nearby market comparison
| Market | Local factor | Median | Per sq ft of attic floor |
|---|---|---|---|
| Round Rock (this page) | x0.971 | $2,700 | $1 – $4.50 |
| El Paso | x1.004 | $2,800 | $1 – $4.50 |
| Arlington | x1.004 | $2,800 | $1 – $4.50 |
| Corpus Christi | x0.987 | $2,800 | $1 – $4.50 |
What Round Rock homeowners actually paid
Real reported invoices from this market, aggregated. Add yours — it takes 20 seconds and no personal details.
Quotes homeowners were given in Round Rock
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Round Rock insulation costs
Hometriva does not publish invented city prices. The Round Rock estimate for attic insulation is produced by this chain, and every input is stored separately:
- National baseline$2,800
Typical U.S. cost for attic insulation on a single-family home.
- Local labor factorx0.935
Round Rock-area trade labor rates, weighted at 35% of this job.
- Material factorx0.988
Material and delivery pricing into Williamson County, weighted at 65%.
- Regulatory factorx1.027
Local code, product-approval and inspection load, applied at 5% for this project type.
- Applied multiplierx0.971
Blended Round Rock adjustment specific to attic insulation.
- Permit component$0 – $145
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, attic insulation in Round Rock 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 attic insulation pricing in Round Rock, TX.
- • 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
What R-value does Florida require in the attic?
The Florida Energy Conservation Code generally calls for R-30 to R-38 in a vented attic for a residential retrofit. Check with your building department, since the requirement depends on assembly type.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.