1139 12th St , Boulder, CO 80302

How do I schedule a tour of 1139 12th St?

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 1139 12th St.

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 1139 12th St?

Click Ask a Question to talk with our team. You already know it is a N/A bed, N/A bath, listed for $3,310,000. We can talk through recent upgrades, potential seller motivation, how this duplex compares to others in Boulder, and can even get you in to see the property quickly.

How much is the monthly mortgage payment for 1139 12th St?

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 1139 12th St at around $20,033. 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 1139 12th St?

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 Boulder 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 1139 12th St?

In most cases, yes. Whether 1139 12th St is priced competitively or not, your best offer depends on your personal situation, the seller's timeline, and recent activity in Boulder'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 1139 12th St?

We can handle that for you. Our preferred local agent specializes in residential incomes in Boulder 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 $3,310,000 with 3,898 sqft of space—that comes out to approximately $849 per square foot.

How long has this property been on the market?

1139 12th St was listed on August 27, 2026, which means it's been on the market for 78 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 1899, making it approximately 127 years old.

What is the lot size of this property?

1139 12th St sits on a 0.14-acre lot, which is 6,098 square feet.

What schools are assigned to this property?

Based on MLS info, this home is zoned for:

• Elementary: Boulder Community School/Integrated Studies
• Middle: Other
• High: Boulder

Want to see how these schools compare? Check out our Boulder County School Guide to see ratings, reviews, and more for the schools in the area.

What are the property taxes for 1139 12th St?

The most recent public record shows annual property taxes for 1139 12th St were approximately $14,354. 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 1139 12th St 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.