Johnson's Insulation

4.8 (38 reviews)
| Oakland, CA | General Contractor

Johnson's Insulation is a general contractor in Oakland, CA, specializing in whole-home insulation, air sealing, and energy audits.

At a Glance

Category
General Contractor
Location
Oakland, CA
Rating
4.8/5 (38 reviews)
Phone
+15106600455
Services
General Contractor, Service, Point Of Interest

About Johnson's Insulation

Johnson's Insulation is a general contractor based in Oakland, CA, specializing in home electrification services. They hold a Google rating of 4.8/5 based on 38 reviews, indicating consistent customer feedback for their work in the local area.

Their services include insulation installation and related general contracting work, often foundational to home energy efficiency upgrades. They serve homeowners looking to improve their property's thermal performance and reduce energy consumption. As a general contractor, they may oversee various aspects of home improvement projects that intersect with electrification goals.

When considering Johnson's Insulation for a project, homeowners may inquire about specific experience with heat pump installations, electrical panel upgrades, or whole-home energy audits. It is advisable to request details on past projects involving electrification components, along with references and proof of current licensing and insurance for work performed in California.

Services

General Contractor
Service
Point Of Interest
Establishment

Hours

Friday 8:00-18:00 Monday 8:00-18:00 Tuesday 8:00-18:00 Saturday 8:00-18:00 Thursday 8:00-18:00 Wednesday 8:00-18:00

Business information verified via Google Business Profile. Last updated: 2026.

Last verified: May 2026

Contact

1721 Broadway

Oakland, CA 94612

Map

How to evaluate Johnson's Insulation

Before hiring Johnson's Insulation for general contractor work in Oakland, take a few minutes to verify their qualifications and confirm they are the right fit for your project. The right general contractor for one homeowner may not be the right fit for another, so do the diligence up front.

Verify licensing and insurance

Confirm that Johnson's Insulation carries an active CA contractor license appropriate for the scope of work, plus general liability and workers’ compensation coverage. Ask for the license number and look it up on the state board website. A general contractor that hesitates to share these details is a red flag, regardless of how favorable their reviews look.

Get a written, itemized quote

Request a detailed written estimate that lists materials, labor, permit fees, timeline, and payment schedule. Itemized quotes make it possible to compare Johnson's Insulation side-by-side with other general contractor options in Oakland, and they protect you from scope creep once the work begins.

Ask about project experience

Ask Johnson's Insulation how many projects similar to yours they have completed in the last 12 months, whether they will be the primary on-site team or are subcontracting, and how they handle change orders. Request two or three local customer references and actually call them — reviews on Google are useful but a five-minute conversation reveals much more about how a general contractor actually shows up.

Frequently Asked Questions

What services does Johnson's Insulation offer?

Johnson's Insulation offers a full range of services including attic insulation, crawl space insulation, wall insulation, energy audits, and attic cleanups. They specialize in both residential and commercial projects.

What areas does Johnson's Insulation serve?

Johnson's Insulation serves several counties in the Bay Area, including Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma.

Does Johnson's Insulation provide free estimates?

Yes, Johnson's Insulation offers free estimates for their services. You can contact them to schedule a quote.

Is Johnson's Insulation licensed and insured?

Yes, Johnson's Insulation is a licensed and insured general contractor. Their license number is 1051108.

Are there any discounts available for military, public service workers, or seniors?

Yes, Johnson's Insulation offers exclusive discounts for military veterans, public service workers, and senior citizens as a token of appreciation for their service.

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