South Boston Real Estate Gets Cheaper Closer to Dot Ave

The auction was held on St. Patrick’s Day. Ten parcels on the stretch of South Boston where Dorchester Avenue splits off Old Colony, roughly six acres of warehouses, a self-storage building and old seafood plants. One party bid. That party already held the mortgage.

Six months later, on September 10, that same group filed to build 1,945 homes on the site. It is among the largest housing proposals South Boston has seen in years, and every story about it has quoted the same number: $75 million for six acres, about $12.5 million an acre, New York money moving into Southie. The question I keep getting from owners on that side of the neighborhood is some version of the same one. Does this mean my building is worth more?

Here is my problem with the $75 million. A price is a number two parties agree on. A credit bid is a number one party writes to itself. There was no second bidder at that auction, so nothing about that figure tells you what the dirt is worth. The good news is that South Boston produced plenty of real prices this year, and I can read those. They say something more useful, and more surprising, than the headline does.

What actually got filed on September 10

The Letter of Intent went to the Boston Planning Department for 314-420 Dorchester Avenue. The program is four residential buildings, each capped at 200 feet, which is roughly 18 stories, totaling about 1.8 million square feet with approximately 45,000 square feet of ground floor retail. The team is exploring a grocery store on the site. CBT is the architect.

The developers are J.T. Magen & Co. and Extell Development, both out of New York, with The HYM Investment Group as the local partner. Tom O’Brien of HYM is the name on the filing. His stated goal is to get through permitting by early 2027, and his quote to the Globe was “the idea is to build as fast as possible.”

One correction to the coverage, because it matters if you live there. Nearly every outlet described the site as midway between the Broadway and Andrew Red Line stops. Pull the MBTA’s own station coordinates and measure it. The site sits 0.36 miles from Andrew and 0.50 miles from Broadway. It is not midway. It is a seven or eight minute walk to Andrew and a solid twelve to Broadway, and the buildings will read as an Andrew Square project to anyone who actually walks it.

For scale: the city’s 2016 PLAN: South Boston Dorchester Avenue study imagined 6,000 to 8,000 new units across the whole corridor between those two stations. This one filing is somewhere between a quarter and a third of that entire vision, on a single six acre block.

The $75 million was not a price

Andrew Collins, a South Boston developer, started assembling these parcels in 2016. He financed the assembly with mezzanine debt from an entity called Dot Developments LLC, which is affiliated with Magen and Extell. He never filed development plans. The loan went bad. The lender moved to foreclose, Collins sued to stop the auction alleging a fraudulent foreclosure scheme, and the court declined to issue a restraining order. The auction went forward on March 17.

Banker & Tradesman put it plainly in the headline: the lender submitted the bid. Magen and Extell were the only bidders, and their $75 million is roughly half of the $150 million in debt they said they were owed, according to court filings reported by the Boston Globe. Connect CRE filed the whole thing under the heading “Return to Lender,” which is exactly right.

So no outside capital wired $75 million for South Boston dirt in March. A creditor took back its own collateral, wrote off about half its paper to do it, and cleared the title problem that had frozen the block for a decade. That is a workout, not a comp. And the single most telling fact in the whole episode is the one nobody printed: at a public auction, for six acres inside a ten minute walk of two Red Line stops, in the middle of a housing shortage, nobody else showed up to bid.

What South Boston land costs when somebody actually buys it

Two real arms length land trades closed in South Boston this year, and both printed well above the auction number.

The first is small and it is in our MLS. 364-368 Athens Street, a tenth of an acre, closed August 21, 2026 at $2,150,000 against a $2,200,000 original ask. That is $21.5 million an acre. Small parcels carry a premium per acre, so take it with that caveat, but it is a real buyer paying real money three weeks before the Dot Ave filing.

The second is the one people keep mentioning to me. In late July, Procter & Gamble’s Gillette bought 232 A Street in Fort Point from Breakthrough Properties for $99.3 million, 2.4 acres, as part of a roughly $1 billion campus overhaul. That is $41.4 million an acre. Breakthrough had paid $80 million for the same 2.4 acres in 2021, so the same parcel went from $33.3 million to $41.4 million an acre in five years, up 24 percent, with both ends of that round trip being genuine arms length sales.

Read the table the right way. I am not claiming Dot Ave dirt is secretly worth $41 million an acre. Fort Point next to the Seaport and an industrial block off Old Colony are different products with different zoning and different buyers. The point is narrower and firmer than that. Every South Boston land number this year that came from a willing buyer and a willing seller landed above $21 million an acre, and the one number that came from a lender bidding against nobody landed at $12.5 million. Treating the lowest and least real of the three as the signal for the corridor is backwards.

The strange part is that the closer you get, the cheaper it is

This is where I stopped reading the news and went into MLS PIN, because the question my clients are actually asking is about their own building, not about Extell’s.

I pulled every closed residential sale inside one mile of the site this year, then sorted them by straight line distance from 380 Dorchester Avenue. 387 closings, January 1 through September 15, 2026. The gradient runs the wrong way.

Housing within a quarter mile of the biggest residential filing this corridor has ever seen trades at $743 a foot. Housing a mile away trades at $981. That is a 24 percent discount for being closest to the project, and the nearest ring is also the only one where sellers took a real haircut off their opening number, closing at 94.7 percent of original ask against roughly 97 percent everywhere else.

None of that is mysterious once you have walked it. The quarter mile ring around 314 Dorchester Avenue is the industrial edge. It is self-storage, truck bays, the Old Colony split and the rail cut. The reason it is cheap is the exact thing the filing proposes to demolish. Whether you think that is an opportunity or a trap is the entire investment question, and I will give you my answer below.

Inside that ring, the triple-deckers are the real discount

Narrow it to a half mile and split it by product type, and a second gap opens that I think is more actionable than the first.

Eight multifamily sales is a small sample and I am not going to pretend otherwise. But it is not a sample, it is the census. That is every two or three family that closed inside a half mile of the site this year, so here is all of it.

Two things in that table are worth your attention. 8 Glover Court closed at 143.9 percent of its original ask, which is a bidding war on a 1900 two family in the shadow of the site. And 13 Gates Street traded twice inside four months, in February at $1,350,000 and again in June at $1,450,000. Every building in the census predates 1930. This is original Southie triple-decker stock, and somebody is already working it.

What the rent roll says

The sale price only matters next to what the building collects. Same half mile ring, same year, 443 closed leases in MLS PIN.

One bedrooms leased at an average of $3,156 across 107 signings. Two bedrooms at $4,014 across 237. Three bedrooms at $5,001 across 77, and four bedrooms at $5,984 across 22. Average market time on a two bedroom was 32 days.

Run the arithmetic on the average three family in that census at $1,190,000. Three two bedroom units at $4,014 is $144,504 a year gross. That is a gross rent multiple of 8.2 and a gross yield of about 12.1 percent before a dollar of expenses, taxes or vacancy. Now run the same rent through a condo. The average condo in that ring closed at $968,329 and rents as a two bedroom for the same $4,014, which is $48,168 a year, a gross yield of 5.0 percent.

The triple-decker collects roughly two and a half times the gross yield of the condo next door, and you buy the square footage for 53 cents on the dollar. That spread is not new and it is not unique to South Boston. What is unusual is finding it this close to a project of this size, this late in the cycle.

A permit is not a building, and HYM can prove it

Now the part I would want to hear if I were on the other side of this conversation.

The local partner on Dot Ave is HYM, and HYM has the most instructive track record in Boston on exactly this question. In September 2020 the BPDA approved HYM’s Suffolk Downs plan in East Boston and Revere: 10,000 units on 161 acres, an $8 billion project the developer called the largest single creation of housing in Boston history.

Six years later, one residential building has opened. Amaya delivered in 2024 with 475 units. Portico, at 473 units, and The Arden, at 243, are in construction or about to start. Call it 475 units delivered out of 10,000 approved in six years, which is under 5 percent.

I want to be fair to O’Brien here, because the comparison is not perfectly clean. Suffolk Downs is 161 acres with roads, utilities and a whole district to build from scratch. Dot Ave is six compact acres with existing street frontage on two Red Line stops, and four buildings is a far simpler problem than a new neighborhood. It should move faster. But “faster than Suffolk Downs” is a low bar, and the honest shape of the schedule is this. Filing September 2026. Permits targeted early 2027, which almost never happens on the first target. First shovel after that, then roughly three years of vertical construction on a 200 foot building. The earliest anyone is signing a lease in tower one is around 2030, and the fourth tower is a mid-2030s question that depends on a capital market nobody can forecast.

If you are waiting for 1,945 units to soften South Boston rents, you are waiting into the next decade. What arrives long before the supply does is the construction. Old Colony and Dorchester Avenue are going to be a staging area, and the owners closest to the site absorb five or more years of trucks, noise and torn up street before they see a lobby.

Two live variables that could still move the unit count

Neither of these is settled, and both are worth watching if you own nearby.

The first is the affordability requirement. Boston’s Inclusionary Zoning rules, which replaced the old IDP for filings after October 1, 2024, require 17 percent of units at income restricted rents plus another 3 percent set aside for voucher holders, so 20 percent effective. On 1,945 units that is roughly 389 income restricted homes. In February 2026 District 2 Councilor Ed Flynn, who represents South Boston, filed a resolution asking for a temporary rollback to 13 percent. It was referred to the Committee on Housing and Community Development on February 25 and has not moved since. If it ever does, the difference on this project alone is about 136 income restricted units.

The second is the zoning itself. The 2016 corridor plan was approved by the BPDA board in December 2016, and the rezoning meant to implement it has still not been finished ten years later. That is the quiet reason a six acre assembly could sit idle through the biggest housing shortage in the city’s modern history and then go to a foreclosure auction with one bidder. Entitlement risk on this corridor is real, and it is priced into everything around it, including your building.

If you already own near Andrew Square

Do not reprice your house off a press release. A Letter of Intent is the first sheet of paper in Article 80, not an approval, and the last owner of this site held it for a decade and never filed anything at all.

What I would actually expect is gradual. The corridor finally has an anchor project with capital behind it and a clean title, which is more than it has had since 2016, and that supports steady appreciation pressure over a long horizon rather than a step change this year. Against that, if you are in the closest quarter mile, price in years of construction disruption you will live through before any of the upside shows up. If your plan was to sell in the next two years anyway, the filing is a mild positive for your story and I would use it in the listing. If your plan is to sell in 2032, you will likely do better, and you will earn it.

If you want a number on your specific building rather than a neighborhood average, our home value tool is the fastest starting point, and I am happy to run the block level comps behind it.

If you are buying or investing

My read is that the actionable trade here is the existing stock, not the new stock, and the data above is why.

The closest ring to this project currently prices at a 24 percent per foot discount to housing a mile away, and the small multifamily inside it prices at 53 cents on the condo dollar while collecting two and a half times the gross yield. You are buying the discount that the warehouses and the self-storage building created, in the one scenario where somebody has filed plans and put real money behind removing them. That is a cleaner risk than paying a premium for a 2030s delivery, and it is available today at ordinary Southie pricing.

Four things I would underwrite before writing an offer. Buy on the rent roll you can verify, not on the pipeline, because the 12.1 percent gross yield is what pays you while you wait and the entitlement is a free option on top. Walk the specific block at 7 a.m. and understand which side of the construction staging you will be on for five years. Read the 2016 corridor plan and check what the proposed zoning does to your parcel, since the rezoning is unfinished and your lot may be in it. And assume nothing about 2031 rents, because 1,945 units landing at once is the one scenario that could genuinely soften the submarket you just bought into.

The Gillette purchase in Fort Point in July and this filing in September are the second and third large outside checks written into South Boston this year. Institutional money is converging on the neighborhood from more than one direction, which is usually the part people notice last and the part that matters most.

If you own within a half mile of 314 Dorchester Avenue, or you are looking at a two or three family anywhere on the corridor, send me the address. I will pull the closed comps and the lease history on your block and tell you honestly whether the filing changes your number. Reach out anytime at bmnboston.com/contact or 617-955-2224.

Sources

• Boston Globe, “South Boston housing proposal among largest new projects in years,” September 10, 2026
• Boston Globe, “$75 million deal clears path for development of stalled Southie real estate project,” March 17, 2026
• Banker & Tradesman, “Lender Submits $75M Bid for Dot Ave. Block”
• Universal Hub, “Suffolk Downs developer teams up with New York firms for a six-acre project along Dorchester Avenue”
• Bisnow, “Auction Clears Path For Development On Contested Dorchester Avenue Properties,” March 23, 2026
• Boston Planning Department, PLAN: South Boston Dorchester Avenue
• Boston Globe, “Gillette buys back parking lots for nearly $20 million more than its 2021 sale price,” August 18, 2026
• Bisnow, “Boston Approves $8B Suffolk Downs Development,” September 2020
• HYM Investment Group, Suffolk Downs project page
• City of Boston, Inclusionary Development Policy update
• Boston City Council, File 2026-0432, resolution on a temporary IDP rollback to 13 percent
• MBTA V3 API, Andrew and Broadway station coordinates
• MLS PIN closed sale and closed lease records, Suffolk County, January 1 to September 15, 2026. Distance, per acre and yield analysis mine.