Interstate Improvement INC
General · Based in Faribault, MN · Licensed in Washington · License #INTERII920PL
Active
State-verifiedWhat does verified mean?
- State-verified — Checked against WA L&I records, updated daily.
- Owner-verified — The business claimed this listing and verified ownership — free. Claim this listing
- Proven on Subser — The business runs real jobs through Subser — measured performance, not reviews.
License facts
Interstate Improvement INC has been registered with WA L&I since 2008, based in Faribault, MN.
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Oct 13, 2008
- Expiration date
- Feb 26, 2027
- UBI
- 602673322
- Business type
- Corporation
- Phone
- (507) 333-2677
- Location
- Faribault, MN 55021
Source: WA L&I contractor registration — verified Aug 12, 2026. Applies to every row above.
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Claim this free listingBond & insurance on file
| Bond firm | Amount | Effective | Expiration |
|---|---|---|---|
| Western Surety Co | $30,000 | Feb 20, 2025 | Continuous — until canceled |
| Western Surety Co | $12,000 | Feb 20, 2017 | Feb 20, 2025 |
| Insurance company | Amount | Agency | Effective | Expiration |
|---|---|---|---|---|
| Charter Oak Fire Ins Co | $1,000,000 | — | May 1, 2026 | May 1, 2027 |
What the bond and insurance requirements mean for homeowners
Washington requires general contractors to file a $30,000 surety bond with the Department of Labor & Industries as a condition of registration. This contractor's current filing shows a $30,000 bond.
The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.
Principals
| Name | Start date |
|---|---|
| Samuel David Gramling | Jan 22, 2013 |
| Patricia Ann Knish | Feb 26, 2021 |
| Antony Ronald Detomaso | Jan 22, 2013 |
| Nathan William Steckleberg | Feb 17, 2015 |
| Ct Corporation Systems Inc | Oct 13, 2008 |
| Cynthia Louise Nations | Oct 13, 2008 |
| Steven Allen Knish | Jan 31, 2011 |
| Jeremy Paul Gibbs | Oct 13, 2008 |
| Antony Ronald Detomaso | Jan 31, 2011 |
| Patricia Ann Knish | Jan 31, 2011 |
| Jeremy Paul Gibbs | Jan 22, 2013 |
| Ryan James Hunt | Jan 22, 2013 |
What is a General contractor licensed to do in Washington?
A general contractor in Washington is registered with the Department of Labor & Industries to perform or oversee work in multiple building trades. General contractors can take on whole projects — remodels, additions, new construction — and can hire specialty subcontractors for individual trades. The registration requires a $30,000 surety bond and general liability insurance on file with WA L&I.
Browse the directory
Built from Washington State L&I public records, updated Aug 12, 2026. No star ratings or reviews — verification only.