If you want to start volunteering, you have to contact the volunteer coordinator and they will walk you through. If you want to purchase items, you can go into the store during operating hours and make purchases. If you want to donate, you can drop items off during drop off times. They really don't want you to just leave items outside.
Not sure what you would like to get started. This is Habitat For Humanity store. You can go there to buy lightly used building supplies, furniture, tools, etc.
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