Martin Castillo

Officer · Sandstone Engineering INC · GC, remodel, ADU · Contra Costa County · CA

Emailed — · Texted —

CSLB License Master, CLEAR, updated 2026-10-05

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Email

24 hours

Email · This week

Martin,

Name and number. The closer takes it from there.

Nathan Petty
760-916-0235

Martin, Nathan Petty, 858-224-3061. Anyone ask this week?

48 hours after the second

Email · Quiet is fine

Martin,

If nobody asked, no need to reply.

Nathan Petty
760-916-0235

Martin, Nathan Petty, 858-224-3061. Still fine to send one name if they asked.

1 week from the first

Email · Last note this week

Martin,

Last note. We will not canvass your customers.

Nathan Petty
760-916-0235

Martin, Nathan Petty, 858-224-3061. Last note. Name and number only.