What is the average cost of a sunroom in Ada County, ID?

A 3-season sunroom (200 sq ft) averages $20,900 in Ada County, while a fully insulated 4-season sunroom averages $36,100. Screen porch enclosures cost significantly less at $8,550 on average. These figures reflect the local 0.95x cost adjustment based on carpenter wages of $27.09/hr compared to the national average.

Why are sunroom costs slightly lower in Ada County than national averages?

Local carpenter wages average $27.09 per hour, about 8% below the national mean of $29.58 per hour. Since labor represents 40-50% of project costs, this wage difference translates to roughly 5% savings overall. Material costs remain similar to national prices.

Do I need a 4-season sunroom in Ada County's climate?

Ada County sits in IECC Climate Zone 5B (Cold, Dry), with a Very High winter weather risk score of 98.95. A 3-season sunroom provides comfortable use from roughly April through October. For year-round enjoyment, invest in a 4-season room with proper insulation and heating, which costs approximately $15,200 more on average.

What building code requirements apply to sunrooms in Ada County?

Zone 5B energy codes require enhanced insulation values and high-performance glazing. Snow load requirements mandate structural framing rated for accumulated roof weight. Permits are required, and inspections cover electrical, structural, and energy compliance. Budget $500-$1,500 for permits depending on project scope.

How much will a sunroom increase my property taxes?

Ada County's effective property tax rate is approximately 0.56% based on median values ($2,643 annual taxes on $476,000 median home value). A $36,100 four-season sunroom addition would increase assessed value and add roughly $200 per year to your property tax bill.

Can I install solar panels on my sunroom roof?

Yes, and Ada County has excellent solar resources with 5.29 peak sun hours daily and a 16.9% capacity factor. A properly oriented sunroom roof can support panels producing significant energy. At local electricity rates of $0.126/kWh, a 2kW array on a sunroom roof could offset $300-$400 annually in energy costs.

What hazards should influence my sunroom design choices?

FEMA rates Ada County at 98.25 for wildfire risk (Relatively High) and 98.95 for winter weather (Very High). Choose tempered or impact-resistant glass, fire-resistant roofing materials, and structures engineered for snow loads. Lightning risk at 90.14 makes proper grounding and surge protection advisable for any electrical components.

REGIONAL COST GUIDE · Ada County, ID

How Much Does a Sunroom or Enclosure Cost in Ada County, ID?

Sunrooms in Ada County cost $20,900-$36,100 on average. See local labor rates, climate factors, and financing options for your project.

Cost range $14,250 – $33,250

Average $20,900

Updated May 17, 2026

Compare Free Sunrooms and Enclosures Quotes

COST BREAKDOWN

What homeowners in Ada County actually pay.

Local market ranges built from regional labor, materials, and permitting data — not national averages.

3-Season Sunroom (200 sq ft)

$14,250 Avg: $20,900 $33,250

4-Season Sunroom (200 sq ft)

$23,750 Avg: $36,100 $52,250

Screen Porch Enclosure (200 sq ft)

$4,750 Avg: $8,550 $14,250

National avg $22,000 × 0.95x local adjustment = $20,900

Why Ada County prices look like this.

With 4,080 carpenters employed across the Boise City metro area earning an average of $27.09 per hour, Ada County has a robust labor pool for sunroom and enclosure projects. This competitive workforce contributes to local pricing that runs about 5% below national averages. Homeowners here face median property values of $476,000, placing the region in a very high cost tier (2.76x the national median). A 3-season sunroom in Ada County averages $20,900, while fully insulated 4-season rooms run closer to $36,100. Screen porch enclosures offer a budget-friendly alternative at $8,550 on average. Project costs vary based on foundation requirements, glazing choices, and HVAC integration for year-round comfort.

Labor Costs and Contractor Availability

Carpenter wages in the Boise City metro average $27.09 per hour ($56,350 annually), based on 2025 Bureau of Labor Statistics data. This rate falls slightly below the national carpenter average of $29.58 per hour, which helps explain the 0.95x local cost adjustment applied to sunroom projects. The metro employs 4,080 carpenters, providing healthy competition among contractors. Labor accounts for roughly 40-50% of total sunroom costs, with the remainder going toward materials (glass panels, framing, roofing) and permits. For 4-season sunrooms requiring HVAC integration, expect additional electrical and mechanical labor. Request itemized quotes from at least three contractors, and verify Idaho contractor licensing through the state's public works registry.

Weather and Hazard Considerations

Ada County faces elevated natural hazard risks that directly affect sunroom construction choices. FEMA's National Risk Index rates the county at 98.95 for winter weather (Very High) and 98.25 for wildfire (Relatively High). Lightning risk scores 90.14, while inland flood risk sits at 89.82. These conditions demand careful material selection: tempered or impact-resistant glass handles hail and debris better than standard glazing. For wildfire-prone properties, consider fire-resistant roofing materials and ember-resistant vents. Winter weather severity means 4-season sunrooms need robust insulation and heating capacity. Snow load requirements in Idaho building codes mandate structural framing capable of handling accumulated weight on the roof.

Climate Zone and Energy Performance

Ada County falls within IECC Climate Zone 5B (Cold, Dry), classified under the DOE's northern HVAC region. This designation requires sunroom construction to meet specific insulation and glazing standards for energy code compliance. The 'B' moisture regime indicates dry conditions, reducing concerns about humidity-related material degradation. For 4-season sunrooms, Zone 5B mandates higher R-value insulation in walls and roofs compared to milder regions. Double or triple-pane low-E glass becomes essential rather than optional. The cold winters and dry air also influence heating system sizing. Radiant floor heating works well in sunrooms here, as does extending your existing forced-air system with proper ductwork.

Energy Costs and Solar Potential

Idaho residential electricity rates average $0.126 per kWh as of February 2026, among the lowest in the nation. This affordable power reduces the operating cost penalty of adding a sunroom to your home's heating and cooling load. For homeowners considering solar integration, Ada County receives strong solar resources: 5.29 peak sun hours daily and annual production potential of 8,894 kWh from a reference 6kW system (16.9% capacity factor). A south-facing sunroom roof could accommodate solar panels, offsetting both the addition's energy use and existing household consumption. Direct normal irradiance of 6.04 kWh/m²/day indicates excellent conditions for tracking systems, though fixed roof-mount remains more practical for most residential installations.

Financing Your Sunroom Project

With current 30-year mortgage rates at 6.36% (as of May 14, 2026), many Ada County homeowners explore home equity options for sunroom financing. The median home value of $476,000 provides substantial equity for established homeowners to tap. A $36,100 four-season sunroom financed through a HELOC at current rates would cost roughly $230-$280 monthly over 15 years. Cash-out refinancing makes sense only if your existing rate exceeds current levels. Some contractors offer promotional financing through partnerships with lenders, though these often carry higher rates after introductory periods. Property tax implications are modest: Ada County's median annual property tax of $2,643 suggests an effective rate around 0.56%, so a $36,000 addition might increase taxes by approximately $200 annually.

Move on this

Compare Sunrooms and Enclosures quotes in Ada County, ID.

Tell us about your project — we'll match you with up to three licensed, insured pros nearby. Usually within 24 hours.

Get Free Quotes Free · No obligation

Find Local Sunrooms and Enclosures Providers Near You

Enter your ZIP to see rated sunrooms and enclosures pros serving your area.

ZIP code

FREQUENTLY ASKED · 07

Questions buyers ask about sunrooms and enclosures in Ada County.

Short answers to the most common things we hear about local pricing, scope, and timing.

What is the average cost of a sunroom in Ada County, ID?

A 3-season sunroom (200 sq ft) averages $20,900 in Ada County, while a fully insulated 4-season sunroom averages $36,100. Screen porch enclosures cost significantly less at $8,550 on average. These figures reflect the local 0.95x cost adjustment based on carpenter wages of $27.09/hr compared to the national average.
Why are sunroom costs slightly lower in Ada County than national averages?

Local carpenter wages average $27.09 per hour, about 8% below the national mean of $29.58 per hour. Since labor represents 40-50% of project costs, this wage difference translates to roughly 5% savings overall. Material costs remain similar to national prices.
Do I need a 4-season sunroom in Ada County's climate?

Ada County sits in IECC Climate Zone 5B (Cold, Dry), with a Very High winter weather risk score of 98.95. A 3-season sunroom provides comfortable use from roughly April through October. For year-round enjoyment, invest in a 4-season room with proper insulation and heating, which costs approximately $15,200 more on average.
What building code requirements apply to sunrooms in Ada County?

Zone 5B energy codes require enhanced insulation values and high-performance glazing. Snow load requirements mandate structural framing rated for accumulated roof weight. Permits are required, and inspections cover electrical, structural, and energy compliance. Budget $500-$1,500 for permits depending on project scope.
How much will a sunroom increase my property taxes?

Ada County's effective property tax rate is approximately 0.56% based on median values ($2,643 annual taxes on $476,000 median home value). A $36,100 four-season sunroom addition would increase assessed value and add roughly $200 per year to your property tax bill.
Can I install solar panels on my sunroom roof?

Yes, and Ada County has excellent solar resources with 5.29 peak sun hours daily and a 16.9% capacity factor. A properly oriented sunroom roof can support panels producing significant energy. At local electricity rates of $0.126/kWh, a 2kW array on a sunroom roof could offset $300-$400 annually in energy costs.
What hazards should influence my sunroom design choices?

FEMA rates Ada County at 98.25 for wildfire risk (Relatively High) and 98.95 for winter weather (Very High). Choose tempered or impact-resistant glass, fire-resistant roofing materials, and structures engineered for snow loads. Lightning risk at 90.14 makes proper grounding and surge protection advisable for any electrical components.

SOURCES · 08

How these numbers were built.

Cost estimates are derived from government data including the U.S. Census Bureau (ACS), Bureau of Labor Statistics (OEWS), FEMA National Risk Index, EIA energy data, IECC climate zone classifications, Federal Reserve (FRED), and HUD Fair Market Rents.