First and Island: What We Know About Bosa’s Next Marina District Tower

The Marina District is one of the most settled neighborhoods in Downtown San Diego, a quiet grid of established towers between the bay and the Gaslamp Quarter. That’s what makes the site at First Avenue and Island Avenue so interesting. It’s one of the last undeveloped lots in the neighborhood, and Bosa Development, the builder behind many of Downtown’s best-known condo towers, plans to put a new one there.

Here’s what we know so far, what we don’t, and what it could mean for buyers and for owners in the buildings around it.

Where is First and Island?

The site sits in the heart of the Marina District, surrounded by some of the neighborhood’s established towers. Horizons, Bosa’s very first San Diego project, is directly to the north, with Pinnacle to the northwest and Harbor Club to the southeast. The waterfront, Seaport Village and the Convention Center are a short walk south, with the Gaslamp Quarter and Little Italy close by.

It’s a location buyers already pay a premium for: walkable, close to the bay, and calmer than the busiest parts of Downtown.

What has Bosa said?

Bosa’s founder, Nat Bosa, has told the San Diego Business Journal that the company plans a condo tower at First and Island, describing it as “a sleek, beautiful tower.” He also said that new San Diego projects are on pause until there’s more certainty about tariffs, interest rates and the wider economy.

In the meantime, Bosa’s current Downtown project is Andia, a 40-story condo tower at Ninth Avenue and B Street with nearly 400 homes.

How big will it be?

Bosa hasn’t announced official details. Early renderings reportedly show a tower of about 35 stories with roughly 215 condominiums, but those figures could change before plans are final. Floor plans, amenities, pricing and a construction timeline haven’t been released.

We’ll update this post as Bosa shares more.

What to expect from a Bosa tower

If the past is a guide, buyers can expect a design built around the views. Bosa’s Downtown portfolio includes some of the area’s most recognized condo buildings: Horizons, Park Place, Bayside, The Grande, Pacific Gate and Savina. Its most recent towers, Pacific Gate and Savina, set a new standard for finishes, services and amenities in Downtown San Diego.

What it could mean for buyers

New condo towers have been rare in Downtown San Diego, so a new Bosa building in the Marina District would draw strong interest. New construction typically sells in phases before completion, often with the best views and floor plans reserved early. If you’d like to hear about First and Island as soon as there’s real news, let us know and we’ll keep you posted.

In the meantime, there are good options today. Pacific Gate and Savina are Bosa’s two newest completed towers, and resales there come up regularly. Our October 2026 market update shows where prices stand now.

What it could mean for neighboring owners

If you own at Horizons, Pinnacle, Harbor Club or another nearby building, a new tower raises two fair questions: views and value.

• Views: some homes facing the site may see changes, depending on the final design and where the tower sits on the lot. It’s worth knowing your unit’s exposure before the plans are final.
• Value: new luxury construction often lifts interest in a whole neighborhood and sets new price benchmarks, which can support resale values in established buildings nearby.

If you’re wondering how First and Island might affect your home, ask us for a building-level valuation.

Stay informed

The Neuman Team has specialized in Downtown San Diego condos since 1981, with more than 7,400 closed sales, and has been #1 in 92101 for homes sold since 2000. Call (619) 595-7025 to join our list for First and Island updates, or browse our Marina District building guides.

Frequently Asked Questions

What is First and Island in San Diego?

It’s a planned condominium tower by Bosa Development at First Avenue and Island Avenue in Downtown San Diego’s Marina District, on one of the neighborhood’s last undeveloped lots.

When will First and Island be built?

No timeline has been announced. Bosa’s founder has said new San Diego projects are on pause until there’s more certainty about tariffs, interest rates and the economy.

How many condos will First and Island have?

Bosa hasn’t released official figures. Early renderings reportedly show about 35 stories and roughly 215 homes, but those numbers could change.

What other buildings has Bosa built in Downtown San Diego?

Bosa’s Downtown condo towers include Horizons, Park Place, Bayside, The Grande, Pacific Gate and Savina, with Andia currently on sale.