I have posted many times about related issues at this site.

on Boston Ave in west Medford?

yes. the driveway is there. the photo is of the curb in front of the building.

I recently noticed that at the southeast corner of the building - where the foundation meets a paved walkway in back - that the entire building has shifted northwest from this very corner. I noticed it for the first time last night by the light of the outdoor lighting; but it has certainly been that way for a while. There is a slight offset, that follows the pointing of the bricks; it is diagonal. It is evident that the entire building broke away - ever so slightly - from this bottom corner, and the grout or pointing between the bricks was repaired.

But in recent years, the shifting and associated cracking have gotten worse.

It is because the foundation is supported only by a few feet of sediments in front and these sediments are supported by an inadequate retaining wall.

The solution would be to rebuild the retaining wall with larger stones. But such larger stones must be of Gabbro which is a dense rock, denser than granite. The capstones can be granite. This is the current arrangement, but some of the granite capstones are missing, replaced with cement forms; cement is less dense than granite.

I believe Gabbro was quarried locally long ago.

Medford Police Traffic Unit assigned this issue to Steve - Highway Foreman

Another solution would be to re-route Route 60 onto Harvard Ave.

Then, Route 60 would cross the Mystic River via the River Street bridge by Dugger Park, continue onto River Street, then onto Bates Road. Currently, several turns (a left, a right, and another left and another right) would be required to get to the Exit 60 ramp (Lake Street) this way. However – as was done to enlarge Route 2 in Arlington several decades ago – eminent domain could be used to smooth the trajectory of Route 2 between the intersection at Mass. Ave. (Bates Road and Mass. Ave.) and the Exit 60 ramp (Lake Street).

Then, with Route 60 no longer passing in front of the building (520 High Street) additional sediments – sloping gradually away from the current retaining wall – could be added, effectively eliminating the road. Instead, a pedestrian mall and parking would occupy the current road surface in the vicinity. The pedestrian right of way past the building (520 High Street) would be maintained along the north side sidewalk which could be widened. This would allow the continuation of historical re-enactments of Paul Revere's ride as well as all pedestrian uses.

A while ago, I posted a rough sketch of this idea on nextdoor.com and also supplied it to the (previous administration) Mayor's office. While on the surface, this may appear to solely benefit the residents and owners at 520 High Street, this change would greatly affect automobile traffic in the area, especially in cities east of Medford, and could be a catalyst for reduction of automobile traffic – and perhaps even reduced parked vehicles – In the wider area, especially to the east.

In the foreseeable future, this persistent weak geologic force – roughly perpendicular to the generalized coastline – will continue, irrespective of any construction that might be done. But increased sediments around the foundation, even at a distance (covering the existing roadway with a few feet of sand) would locally stabilize the foundation of 520 High Street.

see also Issue # 8044962

Some of the concrete sidewalk in front of the western half of 520 High Street was - with a tractor - removed within the last few days. The fresh cement has now dried. The curbstones were left as is.