548–550 3rd Avenue

1. 1912

   Built.

2. October 30, 1912

   T. Sciocchetti Contracting Company contracted to put up a one-storey and basement frame building, at $2,600.

   The San Francisco Call, 30 October 1912, p. 23
3. Nov 1991

   Permit 9121940 $$$ $1,800

   Voluntary criple wall.

4. Apr 1995

   Permit 9505259 $$$ $25,000

   Horizontal.

5. Apr 2006

   Permit 200604138877 $$$ $35,000

   Replacing kitchen countertop and plumbing fixtures in kitchen and bath in 548. also furnace. replacing al windows with dual glazed wood clad windows. 5 windows at front. no lighting work in kitchen. retile bath.

6. May 2013

   Permit 201305207375 $$$ $10,000

   Replace in kind the front steps to front door. 13 steps. replace tread and riser less than 50%.

7. Jun 2013

   Permit 201306250391 $$$ $4,000

   Repair existing exterior stair footing. as per plan.

8. Jul 2019

   Permit 201907307294 $$$ $27,500

   Reroofing.

9. Oct 2025

   Approved Permit 202506279665 $$$ $30,000

   New adu on 1/f: new living/dining room, kitchen, berdoom, bathroom & 2 closets.

1 nominal $1 street-space or sidewalk permit is omitted from the timeline. 2 expired or cancelled permits are not shown.