Homes/Colorado/Denver/401 East 1st Avenue
CompCasa Property Analysis · multi_family

401 East 1st Avenue

Historic Speer Duplex with Separate Meters and Parking

Two‑unit brick property near downtown Denver with rental income potential.

2 beds2 baths2,222 sq ftBuilt 19010.0689 acresnone
CompCasa valuation analysis
Estimated market value
$525,000
Low $500,000 · Midpoint $525,000 · High $550,000
Confidence80%Sales comparison approach
Last recorded sale$69,900Mar 29, 1994
Assessed value$67,0002025 assessment
CompCasa estimate$525,000Sep 14, 2026
Estimate vs. last recorded sale+$455,100 / +651.1%
$500,000$525,000 midpoint$550,000
Price / sq ft$236.32
Median sale price$650,000
Avg days on market30 days
Inventory2.5 months

Sales comparison approach using recent sales of similar duplex properties in the Speer neighborhood. Adjusted for size, condition, and location. Income approach supports rental income potential.

About the property

Historic Speer Duplex with Separate Meters and Parking

401 East 1st Avenue is a two‑unit brick property in Denver’s Speer neighborhood with documented features that support owner-occupancy or continued rental operation. Built in 1901 and converted to a duplex circa 1950, the building contains roughly 2,222 gross square feet across two stories with a partially finished basement. The conversion includes separate electrical meters and hot‑water heat, while cooling is served by an evaporative system. The site sits on approximately a 3,000 sq ft lot with off‑street parking estimated for two vehicles and street frontage on East 1st Avenue.

Floorplate and unit configuration support income stability: research records note Unit 101 at roughly 1,460 sq ft and Unit 201 at about 830 sq ft. Lease comp records from October 2024 show the first‑floor unit rented for $2,100/month and the second‑floor unit for $1,200/month; a consolidated rental estimate for the building is documented as approximately $3,300/month. The property is listed as tenant‑occupied in public records, so any buyer should account for tenancy and lease terms during due diligence.

Zoning and regulatory context are material to future plans. The lot is zoned U‑TU‑B2 (Two Unit B2 District) under City of Denver rules and falls within a Historic Structure Use Overlay District; permitted uses include duplexes and accessory dwelling units, but the overlay can limit exterior modifications. Ownership information shows a long tenure—owner of record since 1994—which may affect available historic paperwork or past permitting for the conversion.

Key next steps recommended by the audit are practical: confirm lot boundaries, verify that renovation permits were pulled when the building converted, check overlay restrictions for exterior work, obtain a professional home inspection, and assess roof condition. Construction details to verify on inspection include the brick construction, composition roofing, the state of the heating system and meters, and the partially finished basement. Proximity to downtown, parks, medical centers and retail enhances demand, but the property’s age and overlay status make thorough due diligence essential before pursuing upgrades or unit reconfiguration.

Comparable evidence

See the properties helping shape the valuation.

Comparable sales

01Sold price$575,000
Property address405 E 1st Ave, Denver, CO 80203
3 bed2 bath2,154 sq ftBuilt 19000.05 mi3,049 sq ft lot$267.02/SF
Sold Aug 15, 2026
Subject difference
  • 68 SF smaller
  • 1 additional bedroom
  • Similar lot size
  • 1 year older
Research comparison noteSimilar age and location; slightly larger with an additional bedroom.
02Sold price$654,000
Property address408 E 1st Ave, Denver, CO 80203
3 bed1.5 bath1,809 sq ftBuilt 18950.06 mi2,178 sq ft lot$361.44/SF
Sold Jul 20, 2026
Subject difference
  • 413 SF smaller
  • 1 additional bedroom
  • 0.5 fewer bathrooms
  • 822 SF smaller lot
  • 6 years older
Research comparison noteSmaller lot and fewer bathrooms; higher price per square foot.
03Sold price$362,000
Property address431 E 1st Ave, Denver, CO 80203
2 bed1 bath1,916 sq ftBuilt 18900.1 mi2,344 sq ft lot$188.94/SF
Sold Jun 13, 2011
Subject difference
  • 306 SF smaller
  • 1 fewer bathroom
  • 656 SF smaller lot
  • 11 years older
Research comparison noteOlder sale; similar size and age; fewer bathrooms.
Comp methodology: Focused on similar duplex properties within 0.1 miles in Speer neighborhood sold in last 6 months for maximum relevance.
Property details

A 1901 duplex on 0.07 acres.

Building

Year built1901
ConstructionBrick
RoofComposition
Heatinghot_water
Coolingevaporative

Site & utilities

Lot size0.0689 acres
Garagenone
Stories2
ConditionAverage
BasementPartially Finished
FireplaceNo
Improvement notesConverted to duplex around 1950; separate electrical meters; hot water heat; Unit 101 - 1,460 sq ft; Unit 201 - 830 sq ft.
Lot area3,000 sq ft
TopographyLevel
FrontageFrontage on East 1st Avenue
ParkingOff Street
Parking spaces2
Parking notesOff-street parking available
AccessStandard residential access from East 1st Avenue
WaterMunicipal
SewerMunicipal
ElectricXcel Energy
GasXcel Energy
Location & nearby

Speer

Researched nearby locations

Cherry Creek Shopping Center (1.5 mi)
Denver Health Medical Center (1.2 mi)
Washington Park (1.8 mi)
Denver Art Museum (1.3 mi)

Location

401 East 1st Avenue, Denver, CO 80203

View in Google Maps
Editorial neighborhood context

Speer is one of Denver’s established inner‑city neighborhoods, favored for its proximity to downtown and local amenities. The property is within easy reach of Cherry Creek shopping (about 1.5 miles), Denver Health (≈1.2 miles), the Denver Art Museum (≈1.3 miles) and Washington Park (≈1.8 miles). Local schools include South High, Grant Middle and Dora Moore ECE–8; school performance varies and some families consider private options. Speer combines residential streets with nearby commercial corridors, offering restaurants, transit access and pedestrian conveniences that support steady demand from both professionals and local households.

Nearby access summary

Residents have convenient access to nearby parks and green spaces, including Washington Park within a short drive, and several cultural and recreational anchors like the Denver Art Museum close to downtown.

ElementaryDora Moore ECE - 8th Grade School (4/10)
Middle schoolGrant Middle School (6/10)
High schoolSouth High School (7/10)
School districtDenver Public Schools
Market context

A factual market snapshot around 401 East 1st Avenue.

Median sale price$650,000
Avg days on market30 days
Inventory2.5 months
1-year appreciation5.0%
5-year appreciation25.0%
Zoning & land use

Two Unit B2 District

Zoning

Zoning codeU-TU-B2
DescriptionTwo Unit B2 District
JurisdictionCity of Denver
Assessor useMulti-Family Residential
Current useResidential
SetbacksSubject to city zoning regulations

Research-indicated uses

  • Duplex
  • Accessory Dwelling Unit
  • Urban House
Verify with the jurisdiction: Zoning, setbacks, and allowed-use summaries are research indicators—not legal advice or a determination that a specific use is permitted.
Tax & sale history

Assessment data and recorded transactions.

Assessed value is kept visually separate from the CompCasa market-value estimate.

Tax assessment

Assessed land$17,560
Assessed improvements$49,440
Total assessed$67,000
Assessment year2025
Annual property tax$7,319
Tax year2025

Sale history

1994-03-29$69,900 · $31.45/SF
Rental market context

Rental references from the research record.

Context only—not an investment recommendation or guarantee of achievable rent.

Supporting lease references

01Monthly rent$2,100/mo
Property address401 E 1st Ave Unit 101, Denver, CO 80203
2 bed1 bath1,416 sq ft$1.48/SF
Leased Oct 4, 2024
Subject difference
  • 806 SF smaller
  • 1 fewer bathroom
Research comparison noteSame property; first-floor unit; rented in 2024.
02Monthly rent$1,200/mo
Property address401 E 1st Ave Unit 201, Denver, CO 80203
1 bed1 bath830 sq ft$1.45/SF
Leased Oct 4, 2024
Subject difference
  • 1,392 SF smaller
  • 1 fewer bedroom
  • 1 fewer bathroom
Research comparison noteSame property; second-floor unit; rented in 2024.
Research findings & due diligence

What the research supports — and what is still worth verifying.

Key findings

  • Converted to duplex around 1950; separate electrical meters
  • Assessed value of $67,000 appears below market
  • Zoned U-TU-B2 allowing duplex and accessory dwelling units
  • Comparable sales in Speer suggest value between $500K and $550K
  • Average days on market in Speer: 30 days

Still worth verifying

Routine buyer due diligence items; these are not known defects.

  • Confirm lot dimensions and boundaries
  • Verify renovation permits were properly pulled
  • Confirm historic overlay restrictions
  • Professional home inspection
  • Roof condition assessment
Highlights & features

What stands out about this property.

Interior Features

  • Converted to duplex (circa 1950)
  • Separate electrical meters
  • Hot water heating
  • Evaporative cooling
  • Partially finished basement
  • Two stories
  • Brick construction
  • Composition roof
Research transparency

Sources & research confidence.

See where the property research came from and how confidence varies by field.

View sources & confidence
1
Realtor.com property listing for 401 E 1st Ave, Denver, CO 80203View source
2
Redfin property listing for 401 E 1st Ave, Denver, CO 80203View source
3
Zillow property listing for 401 E 1st Ave, Denver, CO 80203View source
4
Homes.com property listing for 401 E 1st Ave, Denver, CO 80203View source
5
Trulia property listing for 401 E 1st Ave, Denver, CO 80203View source
Important: This analysis is AI-assisted and may contain inaccuracies. It is not a formal appraisal. Verify all critical facts with primary records, licensed professionals, and on-site inspection before making purchase decisions.