Boeckmann Family Trust, a trust connected to the family that owns the 10 Galpin auto dealerships in the region, has purchased a 74,072-square-foot, two-story Class B warehouse on a 5-acre lot in San Fernando. The reason: Its Galpin Honda needed extra space to park cars. The trust purchased the property, at 13880 Del Sur St., for $7.1 million, or roughly $32 a square foot for the land, from a group of investors led by Walter Mosher, who built the building for his business, Precision Dynamics Corp. Mosher sold the company several years ago and no longer needed the property, said Greg Geraci, a senior vice president at CBRE who represented Mosher in the sale along with David Harding, Billy Walk and Matt Dierckman. Alan Scobin, a lawyer who counseled the Boeckmanns in the sale, said Galpin Honda would lease the site from the trust. Scobin said Galpin will complete tenant improvements to the building, but didn’t say whether the company will use it or enter into a sublease. Gian Starita, a vice president at Colliers International, represented the trust with Brenton C. Weirick in the transaction.