About AG Waterproofing & Construction LLC
AG Waterproofing & Construction LLC is a basement waterproofing and crawl space company in Brewster, Washington.
On its website (agwaterproofingandconstruction.com) it mentions garage foundation repair and foundation waterproofing. The quotes below link to the page where each one appears, so you can check them.
Opening hours on Google Maps: Monday to Sunday 7 am–8 pm.
Foundation services
What AG Waterproofing & Construction LLC says on its website
- Garage foundation repair
Deck Waterproofing, Pool Resurfacing, Custom Railing, Garage Floor Coatings, and Deck Maintenance
agwaterproofingandconstruction.com - Foundation waterproofing
AG Waterproofing & Construction, LLC | Waterproofing Decks, Garage Epoxy Flooring, Concrete Resurfacing and Aluminum Railing
agwaterproofingandconstruction.com
Quoted from its website, read in October 2026.
Also typical: crawl space encapsulation, foundation crack repair. That's our assumption from the type of company, not a claim by the company – please confirm.
Inspections, warranty and payment
- Free estimate
Call Today for Free Estimate 509-670-5358
agwaterproofingandconstruction.com
What its website says (October 2026). Ask for the warranty in writing and read what it covers before signing.
Opening hours
| Monday | 7 am–8 pm |
|---|---|
| Tuesday | 7 am–8 pm |
| Wednesday | 7 am–8 pm |
| Thursday | 7 am–8 pm |
| Friday | 7 am–8 pm |
| Saturday | 7 am–8 pm |
| Sunday | 7 am–8 pm |
As listed on Google Maps (July 2026). Call before visiting – hours change.
AG Waterproofing & Construction LLC on the map
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Other pins: companies within 30 miles. Map data © OpenStreetMap contributors.
Before you call, ask about
- Interior drain, exterior membrane or crack injection – and why
- Whether a battery backup sump pump is included
- What the warranty promises: a dry basement, or only the system
- How they'll handle structural cracks or bowing walls, if any
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Questions about this company
How do I contact AG Waterproofing & Construction LLC?
By phone at (509) 670-5358. Through its website, agwaterproofingandconstruction.com.
When is AG Waterproofing & Construction LLC open?
Opening hours on Google Maps: Monday to Sunday 7 am–8 pm.
What foundation services does AG Waterproofing & Construction LLC offer?
On its website it mentions garage foundation repair and foundation waterproofing.
Does AG Waterproofing & Construction LLC offer free inspections?
Its website mentions “Free Estimate”. Ask what the visit includes and whether you'll get the findings in writing.
How much does foundation repair cost in Washington?
Estimated for Washington: sealing a crack about $263–$841; repairing a settling foundation about $4,730–$21,020, mostly depending on the number of piers. Try the cost calculator and compare written quotes.
Foundation repair near Brewster
- Plain Construction and RepairLeavenworth, WA49 miFree estimate