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Exceptionally well-located duplex in the quiet Seacliff neighborhood, just a 10-12 minute walk to the picturesque Rio Del Mar Beach, Marianne's Ice Cream, dining, parks, and public transportation. All units are vacant, allowing for an owner move-in option or simply lease both units at market rates for cashflow. There's significant upside with the straightforward potential to fully convert a third unit in the mostly-finished space downstairs, providing the possibility of having a TRIPLEX with minimal investment at DUPLEX pricing! Both upstairs units are 2 bed/1 bath, have private balconies, vaulted ceilings, luminous natural lighting, and are overall in good rent-ready condition. The downstairs space is a 2 bed/1 bath, with its own private backyard. There three tuck-under enclosed garages (one for each unit), with tandem parking, making for 2 dedicated spaces per unit. Each garage has washer-dryer hookups. Lots of nice updates, including new paint, new decking, and more. Please contact listing agents for detailed marketing package with more information on the property and the ADU conversion opportunity. Financials are projected based on market rents; property is 100% vacant. Buyers/agents to confirm square footage and any other property related information to verify accuracy.

Highlights

  • Residential Income
  • Duplex
  • Built in 1964
  • 0.07 Acre Lot
  • 3 days on Market

  • Bedrooms
    6
  • Year Built
    1964
  • Living Area
    2200.0
  • Heating
    Natural Gas

  • Acres
    0.07
  • Water
    Public

  • County
    Santa Cruz
  • City
    Aptos
  • Zip Code
    95003

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Frequently Asked Questions

How do I schedule a tour of 512 Harriet Ave?

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 512 Harriet Ave.

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

How do I get more information about 512 Harriet Ave?

Click Ask a Question to talk with our team. You already know it is a 6 bed, N/A bath, listed for $1,295,000. We can talk through recent upgrades, potential seller motivation, how this duplex compares to others in Aptos, and can even get you in to see the property quickly.

How much is the monthly mortgage payment for 512 Harriet Ave?

With a 20% down payment and a 30-year fixed loan at an illustrative 7.25% rate, the ez Mortgage Calculator estimates the monthly payment for 512 Harriet Ave at around $7,370. 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 512 Harriet Ave?

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 Santa Cruz 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 512 Harriet Ave?

In most cases, yes. Whether 512 Harriet Ave is priced competitively or not, your best offer depends on your personal situation, the seller's timeline, and recent activity in Aptos'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 512 Harriet Ave?

We can handle that for you. Our preferred local agent specializes in residential incomes in Aptos 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 $1,295,000 with 2,200 sqft of space—that comes out to approximately $589 per square foot.

How long has this property been on the market?

512 Harriet Ave was listed on November 12, 2026, which means it's been on the market for 3 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 1964, making it approximately 62 years old.

What is the lot size of this property?

512 Harriet Ave sits on a 0.07-acre lot, which is 3,049 square feet.

Is 512 Harriet Ave still available for sale?

Yes, this home is still available! Click the ♥ to favorite it so you don't miss any changes—or ask our local expert to schedule a time to see it in person.

Source: ez Home Search, MLS Data

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Bay East ©2026. CCAR ©2026. bridgeMLS ©2026. Information Deemed Reliable But Not Guaranteed. This information is being provided by the Bay East MLS, or CCAR MLS, or bridgeMLS. The listings presented here may or may not be listed by the Broker/Agent operating this website. This information is intended for the personal use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated at November 15, 2026 at 11:16AM.

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