Finding Affordable Storage Units In Kelso begins with a full inventory. Estimate the space your items need, compare possible unit sizes, and ask about rates before choosing. Titan Self Storage. 1712 Westside Hwy, Kelso, WA 98626. Call (360) 810-8669. https://www.tselfstorage.com/storage-units/washington/kelso/titan-self-storage-westside-3501800/