If you are condo shopping on the East Boston waterfront, the hardest part is often not deciding whether you want to live by the harbor. It is figuring out which building actually fits your budget, routine, and long-term plans. In this guide, you will get a clear side-by-side look at Slip65, Slip45, and The Mark so you can compare amenities, HOA ranges, transit access, and buyer fit with more confidence. Let’s dive in.
Why East Boston Waterfront Condos Stand Out
East Boston offers a waterfront lifestyle with quick access to downtown Boston, and that combination is a big reason these buildings get so much attention. At the same time, the neighborhood sits within a broader housing mix that is still renter-majority, with 56.4% renter-occupied and 43.6% owner-occupied housing units in the 2019-2023 ACS, according to a community health needs report citing ACS data.
That context matters when you compare buildings. On the waterfront, the condo options are surrounded by a larger rental-heavy environment, and that helps explain why transit, investor interest, and flexible ownership goals play such a large role in this part of East Boston.
The Three Main Buildings
Slip65 at Clippership Wharf
Slip65 was the first condo phase at Clippership Wharf and was originally marketed as 80 one- and two-bedroom condos, according to developer materials for Slip65. It is part of the larger 7-acre Clippership Wharf waterfront masterplan, which includes restaurants, recreation, public art, a Harborwalk, an amphitheater, a dog park, and seasonal kayaking and boating.
Among the major East Boston waterfront condo options, Slip65 has the strongest resort-style waterfront identity. Amenities include 24/7 concierge, a fitness center, club room, theater room, lounges, outdoor grilling, dog park, and bike and kayak storage, with listing materials also highlighting access to the Maverick Blue Line and water taxi.
Slip45 at Clippership Wharf
Slip45 is the second condo phase at Clippership Wharf and was designed as a 114-condo building, based on project materials from Architectural Team. It shares the same waterfront setting as Slip65 but offers a broader mix of layouts, from studios to three-bedroom homes.
Its amenity package includes concierge, garage parking, fitness center, outdoor grills, kayak launch, pet spa, bike storage, and in-unit laundry. Public-facing materials also emphasize oversized windows, skyline and harbor views, and private balconies in many units.
The Mark at DeNormandie Wharf
The Mark at 99 Sumner Street is a 107-unit waterfront condo building, according to project information for The Mark. It is positioned as a full-service building with a strong amenity lineup and easy transit access.
Current listing descriptions highlight 24/7 concierge, a fitness center with flex studio, harbor-view terrace with grills and fire pits, golf simulator, conference and entertainment spaces, pet spa, and car-share. Listings also describe it as about a 2-minute walk to Maverick Square Blue Line, with water taxi access nearby.
Comparing Amenities and Lifestyle
If your top priority is the strongest direct waterfront feel, Slip65 usually stands out first. Its amenity mix and masterplan setting lean heavily into open harbor access, outdoor gathering areas, and a more immersive waterfront experience.
Slip45 feels a little broader in appeal. You get the Clippership Wharf setting and strong amenities, but the wider range of floor plans may give you more flexibility if you need a studio, a larger home, or something in between.
The Mark offers a polished full-service experience with a different feel. Its amenity package is especially appealing if you want convenience, social spaces, and strong access to Maverick Square without being tied specifically to the Clippership Wharf ecosystem.
HOA Costs and Monthly Carrying Costs
HOA fees are one of the biggest factors to compare in East Boston waterfront condos. A lower purchase price does not always mean a lower monthly cost once you add HOA dues, parking, and storage.
Based on examples from current and recent listings in the research, the rough HOA ranges are:
| Building | Approximate HOA Range |
|---|---|
| Slip65 | $659 to $1,306 per month |
| Slip45 | $403 to $960 per month |
| The Mark | $353 to $1,030 per month |
Across newer waterfront buildings, HOA fees often cover a broad package that may include concierge or security, elevators, common-area maintenance, snow removal, trash, reserve contributions, and often water and sewer plus amenity access. Research based on current listing examples and HOA structure notes shows that larger waterfront homes and penthouses can push monthly fees above $900 to $1,000.
Transit and Convenience
Transit is a major part of the value story for all three buildings. Slip65 and Slip45 benefit from the Clippership Wharf location, where marketing materials emphasize access to the Maverick Blue Line and water taxi.
The Mark is especially notable for proximity to Maverick Square. Listing descriptions in the research report say it is roughly a two-minute walk to the Blue Line, which can be a major advantage if your daily routine depends on a fast, predictable commute.
Which Building Fits Your Goals?
Best for the strongest waterfront feel
Slip65 is often the best match if you want the most direct connection to the harbor and a more resort-like amenity package. That can be very appealing if views, outdoor space, and a strong sense of place are at the top of your list.
The tradeoff is usually cost. HOA examples for Slip65 trend higher than the other two, so it is important to look at your full monthly budget rather than focusing only on the purchase price.
Best for the broadest condo selection
Slip45 tends to be the most versatile option. With layouts ranging from studio to three-bedroom homes and a strong amenity package, it can appeal to a wide range of buyers who want waterfront living with more choices in size and layout.
For many buyers, this makes Slip45 a useful middle ground. You still get the Clippership Wharf setting, but with a wider range of entry points and monthly carrying costs.
Best for flexibility and easier entry
The Mark may offer the easiest entry point of the three based on the HOA examples in the research. It also shows the clearest investor-flexibility signal, since public rental activity appears alongside for-sale inventory in a way that suggests a more mixed ownership pattern.
If you are thinking not only about how you will live in the home today, but also about future leasing potential, The Mark may deserve a close look. That is especially true if transit access is a key part of your decision.
The Broader East Boston Context
It helps to remember that these condo buildings are not operating in isolation. Clippership Wharf itself is a mixed ecosystem that includes condos along with 284 apartments, according to a Lendlease update on Clippership Wharf.
That larger rental presence, along with nearby rental communities, helps explain why East Boston remains renter-majority overall. For you as a buyer, that does not make one building better or worse, but it does mean your decision should factor in your personal goals, whether that is full-time living, a future hold, or a more flexible ownership strategy.
What to Check in Every Listing
Even if you already know which building you prefer, the specific unit still matters just as much as the address. Before you move forward, compare the details that can change both your lifestyle and your monthly costs.
Focus on these listing-level questions:
- What direction does the unit face?
- Is the view open water, skyline, courtyard, or a mix?
- What floor level is the home on?
- Is parking deeded, valet, rented, or not included?
- Is extra storage included?
- What are the current pet rules and fees?
- What exactly does the HOA include?
You should also pay attention to waterfront resilience features. The research notes that Clippership Wharf materials reference flood barriers and residential floors set above current high tide, while The Mark’s project case study references sea-level-rise design and shoreline stabilization.
A Smart Way to Compare East Boston Waterfront Condos
The simplest rule of thumb from the available research is this: Slip65 for the strongest waterfront feel, Slip45 for the broadest all-around selection, and The Mark for flexibility and a potentially easier entry point. That does not replace a unit-by-unit review, but it gives you a strong starting framework.
If you are weighing the East Boston waterfront, the best next step is usually to compare actual active listings through the lens of your monthly budget, commute, view preferences, and long-term plans. When you want local guidance on buying, leasing, or managing a waterfront condo, connect with Urban Circle Realty for owner-led, neighborhood-specific advice.
FAQs
What is the main difference between Slip65, Slip45, and The Mark in East Boston?
- Slip65 is generally the strongest fit for a direct waterfront lifestyle, Slip45 offers the broadest range of layouts, and The Mark stands out for transit convenience and flexibility.
What are typical HOA fees for East Boston waterfront condos?
- Based on recent listing examples in the research, HOA fees range roughly from $353 to $1,306 per month depending on the building, unit size, and location.
Which East Boston waterfront condo building may work best for investors?
- The Mark shows the clearest investor-flexibility signal in the research, while Slip45 can also appeal to both owner-occupants and investors.
What should you compare besides price in East Boston condo listings?
- You should compare HOA fees, parking, storage, pet policies, floor level, view direction, and whether the unit faces open water or interior space.
Why does the renter-majority makeup of East Boston matter for condo buyers?
- It gives you context for the local housing mix and helps explain why rental activity, transit access, and ownership flexibility are important parts of the East Boston waterfront market.
