Prosto-Construction INC
Siding · Spokane Valley, WA · License #PROSTI*810DE
Prosto-Construction INC is one of 5 Siding contractors registered in Spokane Valley, registered with WA L&I since 2019. Current filings: $1,000,000 liability coverage through Mar 10, 2027. Principals on record since 2019.
How confident can you be in Prosto-Construction INC?
Are they licensed, bonded, and insured?
Active license and $1,000,000 liability on file — checked against WA L&I records, updated daily.
Are they who they say they are?
Not yet verified — Prosto-Construction INC hasn't claimed this listing. Own this business? Claim it free.
Do other pros stand behind them?
No endorsements yet from other licensed contractors in Spokane Valley.
Do they have jobs on record?
Not yet measured — Prosto-Construction INC hasn't run jobs through Subser. Performance data comes from real jobs, not reviews.
Subser doesn't do star ratings or reviews — just verified records.
License facts
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Mar 5, 2019
- Expiration date
- Sep 27, 2026
- UBI
- 604385806
- Business type
- Corporation
- Phone
- (253) 293-7789
- Location
- Spokane Valley, WA 99206
Source: WA L&I contractor registration — checked Aug 18, 2026. Applies to every row above.
Registration is current through Sep 2026.
Is this your business? Claim it free to verify ownership — takes about two minutes.
Claim this free listingBond & insurance on file
| Insurance company | Amount | Agency | Effective | Expiration |
|---|---|---|---|---|
| United Financial Casualty Comp | $1,000,000 | Safe Shield Insurance LLC | Mar 10, 2026 | Mar 10, 2027 |
What the bond and insurance requirements mean for homeowners
A $15,000 surety bond, filed with the Department of Labor & Industries, is a condition of registration for specialty contractors in Washington (general contractors file $30,000).
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 |
|---|---|
| Yurii Blyzniuk | Mar 5, 2019 |
What is a Siding contractor licensed to do in Washington?
A siding specialty contractor is registered with WA L&I to install and repair exterior siding — fiber cement, vinyl, wood, and similar cladding, along with associated trim and weather barriers. Washington requires a $15,000 surety bond and general liability insurance for this registration. Washington currently lists 5 Siding contractors registered in Spokane Valley.
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Subser doesn't have reviews or star ratings. This page shows Prosto-Construction INC's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.
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Built from Washington State L&I public records, updated Aug 18, 2026. Subser doesn't do star ratings or reviews — just verified records.