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Efficient Contracting LLC.

WA + ID, registered in both statesEst. 2026

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Credentials & honors
  • Registered in both statesWA L&I + Idaho DOPLRegistered in both states. Holds a current Washington L&I registration and a current Idaho contractor registration, so it can legally take jobs on both sides of the state line.

Residential customers around Spokane are the natural audience for Efficient Contracting LLC, a general contractor formed in 2026 and registered on both sides of the state line. It holds a Washington L&I registration and an Idaho contractor registration, so a job in Spokane Valley or across the border in Idaho falls within what it may legally take on. The state puts the crew at one to three people, with the owner working on the job.

Efficient Contracting is a new, small outfit. The state lists Michael Krupko as a principal since 2026, the year the LLC was formed and registered in Washington, with the Idaho registration following that same spring. The business is based out of Spokane and travels roughly 25 miles, which reaches Spokane Valley, Liberty Lake, Mead, Cheney and Airway Heights. A crew that size means the person who bids the job is likely the one doing it. That makes it a fit for homeowners with residential projects who are comfortable hiring a newer contractor and want to deal directly with the owner. Large or complex commercial builds, where a long track record and a bigger crew matter, are better matched elsewhere. On an older Spokane home, the repair-or-replace question usually comes down to what sits behind the visible problem. A soft spot in a floor, a sagging deck or a leaking window can be a small fix, or a sign of rot that has spread through framing after years of freeze and thaw. Ask a general contractor to open things up enough to see the extent before committing either way, and to explain what a repair buys you in years compared with replacing the whole assembly. Patching makes sense when the surrounding structure is sound; replacement makes sense when repeated patches keep chasing the same failure.

WA L&I registration verified October 1, 2026 · see the state record

WA L&I registration
Registration number
EFFICCL742DF
Registration checked
October 1, 2026
Registered since
2026
Expires
March 2028
Also registered in Idaho
4281300
Contractor bond
$30,000 · Western Surety Co
Liability insurance
$1,000,000 · State National Ins Co Inc
Insurance through
March 2027
Check it on the state record
The record

The details on Efficient Contracting LLC

WA L&I registration
EFFICCL742DF
Idaho registration
4281300
Registration checked
October 1, 2026
Registered since
2026
Expires
March 2028
Contractor bond
$30,000 · Western Surety Co
Liability insurance
$1,000,000 · State National Ins Co Inc
Insurance through
March 2027
Established
2026
Primary trade
General Contractor
L&I specialty
GENERAL
Registered principal
Michael Krupko · since 2026
Based in
Spokane

Own this business? Claim the listing to correct anything here.

Before you call

Questions worth asking Efficient Contracting LLC

Is Efficient Contracting LLC a registered contractor?

Registration EFFICCL742DF is the one to check, and it expires March 2028. It is Efficient Contracting LLC's, filed with Washington State L&I. They are also registered in Idaho (4281300), so Coeur d'Alene-side work is covered too. That was current on the state record as of October 1, 2026 — the link on this page goes to the record itself. On file alongside it: a $30,000 contractor bond (Western Surety Co) and $1,000,000 of liability insurance with State National Ins Co Inc through March 2027. Ask them to send the bond and insurance certificates over before the first day on site.

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