Second Story Addition in Manteca, CA — Costs $106,453 to $665,333
What does second story addition cost in Manteca? Average $266,133, ranging $106,453–$665,333. Labor runs $44.14/hr locally — 33% above the national average. Free breakdown with material + labor split.
Quick Estimate: Second Story Addition in Manteca, CA
A typical second story addition in Manteca costs about $266,133 in 2026, with a practical range from $106,453 to $665,333. Local labor runs $44.14/hr, materials index at 119, and expected ROI is 60%.
Average Cost
$266,133
Permit Budget
$1,549
Labor Share
$133,067
Timeline
4-8 months
Hiring a Second Story Addition Contractor in Manteca, CA
When comparing second story addition contractors in Manteca, ask each company to quote the same scope, material grade, permit responsibility, cleanup, warranty, and timeline. That keeps the $106,453 to $665,333 local range useful instead of comparing unrelated bids.
Bid must include
Labor hours, material allowance, permit responsibility, disposal, equipment rental, and any change-order rules.
Verify before deposit
License status, insurance, recent local photos, warranty term, payment schedule, and who handles inspections.
Red flags
Cash-only pricing, vague scope, no written warranty, unusually low pump or material allowance, or a large upfront payment.
Manteca, CA Market
+33% vs nationalLabor Rate
$44.14/hr
Material Index
119
Avg Permit Cost
$1,549
Median Home Price
$490,000
In a smaller market like Manteca, California, the pool of contractors specializing in second story addition may be more limited. Getting 3+ quotes is especially important to ensure fair pricing. At 33% above the national average, Manteca is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. The median home in Manteca is valued at $490,000, putting this project at about 54.3% of home value — a moderate investment with a projected 60% ROI.
Low Estimate
$106,453
National: $80,000
Mid-Range
$266,133
National: $200,000
High End
$665,333
National: $500,000
Per Sq Ft
$399
National: $300
Second Story Addition Cost Calculator for Manteca
Adjusted for Manteca's labor rate ($44.14/hr) and material costs (index 119).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Manteca
$266,133
Based on 200 sq ft at mid quality, adjusted for Manteca market rates.
Local Cost Breakdown
At Manteca's average rate of $44.14/hr (47% above national avg)
Material cost index 119 (19% above national baseline of 100)
Second Story Addition vs. Home Value in Manteca
| Metric | Manteca | National Avg |
|---|---|---|
| Second Story Addition (Mid-Range) | $266,133 | $200,000 |
| Median Home Price | $490,000 | $350,000 |
| Project as % of Home Value | 54.3% | 57.1% |
| Estimated ROI | 60% | 60% |
| Median Household Income | $72,000 | $75,000 |
What Affects the Price in Manteca
- 1Local labor rates ($44.14/hr in Manteca)
- 2Material cost index (119 vs national 100)
- 3Total square footage added
- 4Structural reinforcement of first floor
- 5Staircase addition
- 6Roof removal and replacement
Popular Upgrades
- Master suite
- Additional bedrooms
- Jack-and-Jill bathroom
Planning a Second Story Addition in Manteca
Building permits are typically required for a second story addition in Manteca. The average permit fee in this area is $1,549, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 4-8 months from start to finish.
A second story addition is a complex project best left to licensed professionals. In Manteca, skilled contractors charge an average of $44.14/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Manteca household earning $72,000/year, this project at $266,133 represents a significant investment. Consider financing options or phasing the work to spread costs over time.
Financing the project? Compare current rates with Manteca mortgage and HELOC rates to estimate monthly payments. For tax implications, mortgage interest deduction may apply — see SALT deduction guide.
Methodology & Local Data Sources
How we estimate second story addition costs in Manteca: Our local cost figure of $266,133 for Manteca, CA is calculated by adjusting the national mid-range baseline of $200,000 using two location-specific factors:
- Labor adjustment — 50%% of the project cost is labor. We multiply this by Manteca's wage index, derived from BLS Occupational Employment and Wage Statistics for construction workers (SOC 47-0000). Manteca skilled-trade labor averages $44.14/hr, compared to the national construction worker median.
- Materials adjustment — 50%% of cost is materials. Manteca's material cost index is 119 (national baseline = 100), based on regional shipping, lumber, concrete, and metal prices tracked by the Bureau of Labor Statistics Producer Price Index for Construction Materials.
- Permit fees add $1,549 on average in Manteca. Permit costs vary by project scope, square footage (200 sqft typical), and inspection requirements set by the local building department.
- Cost-per-square-foot for this project in Manteca: approximately $1331/sqft, useful for comparing bids from contractors.
Authoritative data sources (US gov):
- BLS — Construction and Extraction Occupations Wages — labor rate baseline for California
- BLS Producer Price Index — Construction Materials — monthly materials cost tracking
- U.S. Census Bureau — Manteca QuickFacts — household income, demographics, housing
- DOE Building Energy Codes Program — energy efficiency requirements affecting second story addition permits
- International Code Council (ICC) — IBC, IRC, and IECC code references most California jurisdictions adopt
- EPA RRP Rule — Renovation, Repair, and Painting compliance for pre-1978 homes
Disclaimer: Cost estimates are based on regional averages and modeling — actual quotes from licensed contractors in Manteca may vary ±15% based on project complexity, contractor backlog, and material availability. Always obtain at least 3 written bids before committing.
Reviewed by Brazora Monk · Last updated 2026
Find a Licensed Contractor + Permits in Manteca
For a second story addition in Manteca, California, verify whether the contractor or specialty trade must be licensed, registered, insured, or permitted locally. Use official lookup tools and the local building department instead of trusting general directory sites:
Each state has its own licensing board. Verify before signing any contract:
Permit fees vary by jurisdiction within California:
- • Census Building Permits Survey
- • NACo County Explorer
- • Shovels.ai Permit Database
- • Search "manteca building permit" + your county for direct portal
Verify contractor has workers' comp + general liability:
- • Ask for COI (Certificate of Insurance) before work starts
- • OSHA — Worker Safety Standards
- • Most states require minimum $500K-$1M general liability
Most California jurisdictions adopt these:
Why this matters: Hiring an unqualified or uninsured contractor in California can create insurance, inspection, warranty, and code-compliance problems. Always verify license or registration requirements, insurance, permit responsibility and inspection closeout before signing contracts.
Second Story Addition — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
All Construction Costs in Manteca
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- → Levyio: Tax Bracket Calculator — energy-efficiency renovation tax credits depend on your bracket