Insulation Cost in Portola Valley, CA in 2026
Most Insulation projects in Portola Valley, CA cost between $1,600 and $6,500. The typical price is $3,200.
Labour and materials in Portola Valley run about 17% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Batt, blown-in cellulose or closed-cell spray foam
- Target R-value for your climate zone
- Attic, wall or crawlspace access
- Air sealing done alongside the insulation
Usually included
- Insulation material to the specified R-value
- Installation and air sealing at obvious gaps
- Cleanup and disposal
Usually extra
- Removing contaminated existing insulation
- Ventilation or moisture remediation
- Drywall work for wall injection
Unit prices in Portola Valley, CA
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $1.34 |
| Mid-range | $2.68 |
| High-end | $5.57 |
Insulation contractors in Portola Valley, CA
Businesses listed on Google near Portola Valley, CA. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Attic Star
4.9(192 reviews)
2847 Middlefield Rd, Redwood City, CA 94063
Vortex Insulation
5.0(48 reviews)
1273 Industrial Pkwy W #530, Hayward, CA 94544
Attic Bros of Mountain View
4.9(46 reviews)
800 W El Camino Real Unit 310, Mountain View, CA 94040
Attic Bros of Palo Alto
4.9(39 reviews)
3000 El Camino Real #2, Palo Alto, CA 94306
SDI Insulation Inc
4.8(42 reviews)
370 Lang Rd, Burlingame, CA 94010
Delta Spray Foam Insulation
5.0(34 reviews)
472 Castro St, Mountain View, CA 94041