1141 18th St

1141 18th St is a 7-story condominium building in Greater Downtown Denver. Its floor plate has 88% of its area within daylight reach of a facade and scores 76 out of 100 on this screen’s measures, which is part of why it works as housing.

CO-1 · Screened 2026-09-19 · Already housing

Also addressed as 1800 Lawrence St: Denver’s address records place both on this one footprint.

Where 1141 18th St is

Its block in Greater Downtown Denver, drawn from Denver's own building outlines and street centerlines.

Suitability score

0–29

30–49

50–69

70–100

Already housing
Not screened
1141 18th St

1141 18th St and the 1,000 ft of Greater Downtown Denver around it. The streets are drawn at the width of the right-of-way they run down, sidewalks included, and named, and every building on these blocks is drawn. What is left open and stippled is neither: a surface lot, a plaza or a vacant parcel. The screened buildings are colored by the ramp above, the same one the district map uses, carry their score, and each is a link to its own page. Each casts a shadow as long as its measured height lets it, so towers stand out from the low buildings around them; the unscreened buildings have no measured height and cast none. 1141 18th St is outlined in its own score color at the outline it covers at ground level. Dashed inside it is the typical floor, the one the floor-plate figure below draws, because this building steps back as it rises. Its windowless core is hatched. The inset places it among every building the screen covers.

Typical floor plan: 88% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 85%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 1,980 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 53 ft from the nearest window. A–A is where the section beside it is cut.

Section A–A: cut across the depth of the plate, through the middle of the core. Daylight reaches 35 ft in from every facade, fading as it goes, and the hatched stripe left between the lit edges is floor that gets converted and can never be rented: 1,980 sq ft on the floor the screen scores, and 8,988 sq ft over 6 residential floors. The steps are where the building sets back as it rises. The shaded ground floor is converted like the rest and counted as no homes.

This is already a condominium building: Denver's property records list 74 condominiums here. It is on the map because the city's building outlines file it as commercial, but this site does not count it as a conversion candidate.

Across its 6 residential floors this building carries 8,988 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment.

Modeled conversion metrics for 1141 18th St, 2026-09-19.

Suitability scoreStrong candidate	76 / 100
Storiesfrom 79 ft aerial-survey height ÷ 12 ft floor-to-floor	7
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–3: 13,243 sq ft · Floors 4–5: 12,350 sq ft · Floors 6–7: 10,785 sq ft
Floor platetypical floor, from the city outlines	13,243 sq ft
Daylight efficiencyshare within 35 ft of a facade	88%
Deepest interior pointviability threshold is 80 ft	53 ft
Windowless coretypical floor; the building-wide total is in the text above	1,980 sq ft
BuiltDenver does not publish a construction year with this data	—
ZoningCBD	D-C
Opportunity Zonenot in a 2018 designated tract	No

The plan: window line, shape and floor rhythm

39 ft of exterior wall for each home the screen estimates — enough for two- and three-bedroom homes across the plan.

The typical floor has 463 ft of exterior wall, and across 6 residential floors the building carries 2,667 ft of it in total, divided among the 68 homes this screen estimates.

Its plate is compact at 0.78: close to a square or a circle, the most efficient envelope an office can have and the least generous one for apartments: little perimeter to divide among homes. How window line and plate shape are measured.

At the model’s 750 sq ft average, the plan works out at about 11.3 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 1141 18th St scores 76 out of 100

Daylight efficiency 95, Interior depth 67, Scale 45, Finance 61 — each out of 100, then weighted.

Score components for 1141 18th St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency88% of the floor area within 35 ft of a facade, scored from 40% up to 90%	95	45%	42.9
Interior depthdeepest interior point 53 ft from a facade, scored from 80 ft down to 40 ft	67	25%	16.7
Scale68 estimated homes, scored from 0 up to 150	45	15%	6.8
Financeremaining gap is 23% of conversion cost, scored from 60% down to 0%	61	15%	9.2

Most of what it earns comes from daylight efficiency, and what holds it back most is scale, at 45 out of 100: 68 estimated homes, scored from 0 up to 150.

Other buildings screened near 1141 18th St

The 4 closest the screen also covers, from 180 ft away. They are the colored outlines on the plan at the top of this page.

1801 Arapahoe St
11 stories · 100% daylit · already an apartment building
about 180 ft away
1825 Lawrence St
18 stories · 83% daylit · 233 estimated homes · scores 76/100 (Strong candidate)
about 300 ft away
1125 17th St
37 stories · 75% daylit · 1,152 estimated homes · scores 62/100 (Worth a feasibility study)
about 320 ft away
1800 Larimer St
29 stories · 73% daylit · 614 estimated homes · scores 60/100 (Worth a feasibility study)
about 380 ft away

A screen, not a feasibility study, from outlines and heights rather than plans: the method and how to correct a figure. If you know this building’s interior, you know what this model cannot see.