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If your South Boston search keeps forcing the same choice—great location or real outdoor space—this East Side condo offers a different answer. Step outside your kitchen into more than 550 square feet of private, fenced backyard: room for morning coffee, dinner with friends, gardening, or simply giving your dog a place to get outside without leaving home. Inside, the layout makes smart use of every room. The updated kitchen opens naturally to the living area, while hardwood floors, crown molding, and high ceilings bring classic South Boston character. The second bedroom gives you something especially valuable in a city condo: options. Keep it as a true bedroom, create the dedicated home office you've been looking for, or make it comfortable guest space. Useful basement storage keeps bikes, seasonal gear, and everything else from taking over your living space, while common laundry and a low condo fee add everyday practicality. Pets are permitted, too. Then there's the East Side location, with neighborhood restaurants, cafés, shopping, the beach, Castle Island, public transportation, the Seaport, and downtown Boston all part of the lifestyle. Some condos give you another room. This one gives you more ways to live—inside and out—and a financing incentive designed to help make the monthly payment more manageable.

  • Bedrooms
    2
  • Bathrooms
    1
  • Year Built
    1890
  • Stories
    1.0
  • Living Area
    742.0
  • Interior Features
    Ceiling Fan(s), Pantry, Master Downstairs, Open Floorplan, Crown Molding
  • Appliances
    Dryer, Dishwasher, Microwave, Refrigerator, Washer, Range, Disposal
  • Flooring
    Hardwood
  • Patio And Porch
    Patio
  • Cooling
    Window Unit(s)
  • Heating
    Forced Air

  • Acres
    0.02
  • Water
    Public


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Frequently Asked Questions

How do I schedule a tour of 421 E 3rd St #1?

We can make that happen quickly. Click Tour This Home and we'll connect you directly with our vetted local partner to schedule your visit to 421 E 3rd St #1.

They know residentials in the area well and can give you the guidance you need to buy with confidence.

How do I get more information about 421 E 3rd St #1?

Click Ask a Question to talk with our team. You already know it is a 2 bed, 1 bath, listed for $579,900. We can talk through recent upgrades, potential seller motivation, how this condominium compares to others in Boston, and can even get you in to see the property quickly.

How much is the monthly mortgage payment for 421 E 3rd St #1?

With a 20% down payment and a 30-year fixed loan at an illustrative 6.75% rate, the ez Mortgage Calculator estimates the monthly payment for 421 E 3rd St #1 at around $3,651. This includes estimated property taxes and insurance.

Want to see how this changes with different down payments or interest rates? Jump to the calculator to run the numbers and fine-tune your plan.

How do I get pre-approved to buy 421 E 3rd St #1?

Stand out in a competitive market by getting pre-approved today. Our quick and private pre-approval process helps you understand your true buying power—no credit pull required to explore all of your options.

Or, let us connect you with our preferred local lender in Suffolk County. They will give you all of your available financing options, based on your specific situation and what is available to you.

Can I negotiate the asking price for 421 E 3rd St #1?

In most cases, yes. Whether 421 E 3rd St #1 is priced competitively or not, your best offer depends on your personal situation, the seller's timeline, and recent activity in Boston's market. Our preferred local partner will help you craft a strategy—factoring in comparable properties that have sold, timing, and deal structure—to make a smart, strong offer. Click here to ask about negotiation opportunities.

How do I make an offer on 421 E 3rd St #1?

We can handle that for you. Our preferred local agent specializes in residentials in Boston and can guide you through every step of the offer process.

You need an expert who is looking out for your best interests. From market valuation to contingencies and timing, they'll help you present a compelling offer that fits your goals. Click Ask a Question to get started today.

What is the price per square foot for this home?

This home is listed at $579,900 with 742 sqft of space—that comes out to approximately $782 per square foot.

How long has this property been on the market?

421 E 3rd St #1 was listed on September 09, 2026, which means it's been on the market for 59 days.

Want to keep tabs on it? Click the ♥ to favorite this home and get notified of price drops or changes.

When was this house built?

This home was built in 1890, making it approximately 136 years old.

What is the lot size of this property?

421 E 3rd St #1 sits on a 0.02-acre lot, which is 871 square feet.

What are the property taxes for 421 E 3rd St #1?

The most recent public record shows annual property taxes for 421 E 3rd St #1 were approximately $6,080. This may change with reassessment or exemptions. Our local partner can verify current tax amounts and help you estimate future costs based on your situation.

Is there an HOA fee for this property, and what does it cover?

This home has an HOA fee of $200 paid monthly.

Is 421 E 3rd St #1 still available for sale?

This home is pending sale, which means the seller has accepted an offer. You can favorite it to track status or ask our expert to help you find similar homes in this area. We'll also let you know if this property comes back on the market.

Source: ez Home Search, MLS Data

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Listing information provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information deemed reliable but not guaranteed by the MLS. The listing broker’s offer of compensation is made only to participants of the MLS where the listing is filed. Copyright 2026, MLS Property Information Network (MLS PIN). All rights reserved.

Last Updated: November 07, 2026 at 07:11AM | Source: MLS Property Information Network (MLS PIN) | MLS#: 73573779