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.
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.
See the properties helping shape the valuation.
Comparable sales
- 68 SF smaller
- 1 additional bedroom
- Similar lot size
- 1 year older
- 413 SF smaller
- 1 additional bedroom
- 0.5 fewer bathrooms
- 822 SF smaller lot
- 6 years older
- 306 SF smaller
- 1 fewer bathroom
- 656 SF smaller lot
- 11 years older
A 1901 duplex on 0.07 acres.
Building
Site & utilities
Speer
Researched nearby locations
Location
401 East 1st Avenue, Denver, CO 80203
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.
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.
A factual market snapshot around 401 East 1st Avenue.
Two Unit B2 District
Zoning
Research-indicated uses
- Duplex
- Accessory Dwelling Unit
- Urban House
Assessment data and recorded transactions.
Assessed value is kept visually separate from the CompCasa market-value estimate.
Tax assessment
Sale history
Rental references from the research record.
Context only—not an investment recommendation or guarantee of achievable rent.
Supporting lease references
- 806 SF smaller
- 1 fewer bathroom
- 1,392 SF smaller
- 1 fewer bedroom
- 1 fewer bathroom
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
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
Sources & research confidence.
See where the property research came from and how confidence varies by field.