A six-unit building in Logan Square recently sold for $187,000 more than a comparable six-unit two blocks away. Same square footage. Same condition. Same year built. The difference? The first building had four two bedrooms and two one bedrooms. The second was all studios.
That gap wasn’t fluke. Multifamily unit mix strategy — the ratio of studios, one-bedrooms, two-bedrooms, and larger units in your building — is one of the most underpriced levers in apartment building valuation. Many owners obsess over finishes, vacancy, and cap rates. Smart investors think hard about how bedroom count affects property value, even though your building composition shapes every dollar of income it produces.
In this post, you’ll learn how apartment building composition drives rent potential, buyer demand, and overall valuation — with Chicago-specific data, a calculation framework, and a clear answer to the question every investor asks: What’s the best unit mix for my building?
Whether you’re a long-term holder evaluating a repositioning play, a buyer underwriting your next acquisition, or a seller preparing for disposition — understanding how bedroom count affects property value gives you a pricing edge that most of your competition ignores.
Does Unit Mix Affect Property Value?
Yes — significantly. Buildings weighed toward one-bedroom, and two-bedroom units typically command 10%–20% higher per-unit valuations than studio-heavy buildings in the same submarket. The right bedroom count mix increases gross rent potential, attracts stronger tenant demand, and reduces vacancy risk — all of which drive higher cap-rate-adjusted pricing.
Apartment building valuation is an income equation. Net Operating Income divided by Cap Rate equals Value. Unit mix influences that income in three ways: larger units command higher absolute rents (widening gross revenue), studios produce higher rent per square foot but lower total income per unit (creating an income ceiling), and studios turn over faster — costing you a month of rent plus make-ready expenses with every turn.
| Unit Type | Avg. Rent | Rent / SF | Avg. Lease | Annual Turnover |
| Studio | $1,050 – $1,250 | $2.80 – $3.40 | 10 mo | 55% – 65% |
| 1-Bedroom | $1,350 – $1,650 | $2.30 – $2.80 | 13 mo | 40% – 50% |
| 2-Bedroom | $1,650 – $2,100 | $1.90 – $2.40 | 18 mo | 25% – 35% |
| 3-Bedroom | $1,900 – $2,500 | $1.60 – $2.00 | 22 mo | 15% – 25% |
Ranges reflect 2025–2026 Chicago metro averages across Class B/C properties. Source estimates: CoStar, Apartments.com market reports, brokerage comps.
The takeaway: studios win on rent per square foot, but two-bedrooms win on total income, tenant stability, and lower operating cost per dollar earned.
Why Apartment Building Composition Matters More Than Unit Count
A 10-unit building with eight studios is a fundamentally different asset than a 10-unit building with six two-bedrooms — even at the same total square footage. Too many investors count doors without asking what’s behind them.
Buyer Demand
Balanced mix properties (a blend of 1BR and 2BR with limited studios) attract the widest buyer pool — value-add investors, long-term holders, even condo conversion buyers. Studio-heavy buildings narrow your pool to yield-chasers willing to accept higher turnover. A thinner buyer pool means fewer offers and a weaker negotiating position at disposition.
Financing
Lenders view unit mix through a risk lens. A building full of studios in a neighborhood trending toward families signals product-demand mismatch — and that translates to tighter underwriting. Two-bedroom-heavy buildings in neighborhoods with strong renter household growth secure more favorable terms: lower rates, higher LTV, faster approvals.
Operating Margins
The cost to operate a studio is not proportionally cheaper than a two-bedroom. You still have a kitchen, bathroom, HVAC, and a front door. Per-unit operating cost stays relatively flat while per-unit income drops. Studios compress your operating margin more than larger units — a reality most pro formas ignore.
Factor in turnover costs and the picture gets worse. A studio that turns every 10 months costs you roughly $2,500–$4,000 per turn in lost rent, cleaning, paint, and leasing commissions. A two-bedroom that holds a tenant for 18 months cuts that annual drag nearly in half. Over a five-year hold, that difference compounds into five figures of lost NOI.
Chicago Neighborhood Breakdown: Where Each Unit Type Wins
The optimal unit mix isn’t universal — it’s local. A studio-heavy building thrives in some Chicago neighborhoods and struggles in others.
Lincoln Park / Lakeview — The 1BR Sweet Spot
- Best mix: 50%–60% 1BR, 25%–30% 2BR, 10%–15% studios
- 1BR rent/SF: $2.60 – $3.00
- Why: Young professionals who’ve outgrown shared living but don’t need a second bedroom. The studio-to-1BR rent gap is narrow, so tenants pay for real space.
Logan Square / Humboldt Park — The 2BR Opportunity
- Best mix: 40%–50% 2BR, 30%–40% 1BR, 10%–15% 3BR
- 2BR rent/SF: $2.00 – $2.40
- Why: Dual-income couples and roommate pairs who prioritize space over Loop proximity. Studios sit longer and attract fewer stable tenants in these submarkets.
The Loop / South Loop / West Loop — Where Studios Survive
- Best mix: 30%–40% studios, 35%–40% 1BR, 20%–25% 2BR
- Studio rent/SF: $3.00 – $3.60
- Why: Transient professionals prioritize location and price over space. The rent/SF premium compensates for higher turnover — but only in institutional-quality buildings.
Bridgeport / McKinley Park / Pilsen — Family-Size Wins
- Best mix: 40%–50% 2BR, 25%–30% 3BR, 20%–25% 1BR
- 2BR rent/SF: $1.70 – $2.10
- Why: Multi-generational households and families drive demand. Studios are nearly impossible to fill. Three bedrooms achieve the longest lease terms in the city here.
What’s the Best Unit Mix? A Framework, not a Formula
No single unit mix works everywhere. But this four-step framework works for any building in any neighborhood.
Step 1: Study Renter Demographics Within a Half Mile
Pull Census and ACS data (free at data.census.gov). Average household size above 2.2 means two- and three-bedrooms should dominate. Below 1.8, lean toward one-bedrooms and studios. Median renter age under 30 skews smaller; over 35 skews larger.
Step 2: Audit Competing Supply
If your submarket is saturated with studios, adding more won’t help. Scarcity in a specific unit type creates pricing power. Check what’s listed within a half-mile radius.
Step 3: Run the Rent Gap Analysis
If the gap between studio and one-bedroom rent is under $200/month, studios lose their appeal — tenants will pay slightly more for meaningfully more space. Above $400, studios stay competitive. This gap varies block by block in Chicago, so pull comps within your immediate submarket rather than relying on citywide averages.
Step 4: Model the Valuation Impact
Current Annual Gross Rent ÷ Market Cap Rate = Implied Value. Now model an alternative mix. If you convert two studios into one large two-bedroom, what happens to gross rent? Divide by the same cap rate. The difference is your unit mix value creation opportunity.
Example: A 10-unit building — 6 studios at $1,100/mo and 4 one-bedrooms at $1,400/mo — generates $146,400/year gross. At a 6.5% cap (40% expense ratio), the implied value is roughly $1,351,385. Convert two studios into one two-bedroom at $2,200/mo, reduce turnover cost by $3,000/year, and your adjusted NOI changes the math. Whether it’s up or down depends on your specific operating costs and renovation capital.
This is why you model it — not guess.
Valuation methodology consistent with Appraisal Institute income approach standards and Chicago-area brokerage underwriting conventions.
The Demographic Shift Most Owners Are Missing
Between 2019 and 2025, Chicago saw a measurable increase in renter households with two or more people. Remote work expanded where people are willing to live, pushing demand for larger units into neighborhoods that were previously studio-and-one-bedroom territory.
At the same time, construction costs have made ground-up studio-heavy developments less profitable. New supply skews toward one-bedrooms and two-bedrooms — even downtown. Existing studio-heavy buildings face growing competitive pressure from newer products with more space per unit.
If your building is studio-heavy in a neighborhood attracting couples and small families, you’re swimming against the current. Your multifamily unit mix strategy should factor in where demand is heading — not where it was when you bought it.
This doesn’t mean gut-renovating tomorrow. But it does mean your next capital improvement decision — whether it’s a unit renovation, a layout reconfiguration, or simply how you price your next vacancy — should account for the direction of the neighborhood renter profile. Owners who read this trend early gain pricing power. Those who ignore it watch vacancy creep upward while competing buildings fill faster.
How to Audit Your Unit Mix This Week
Pull your rent roll. Calculate gross rent by unit type. What percentage of income comes from each bedroom count?
Check turnover history. Which unit types turned over most in 24 months? What did each turn cost in lost rent and make-ready?
Compared to market rent. A studio renting $50 below market is telling you something about demand.
Talk to your leasing team. Which unit types get the most inquiries? Which seat is the longest? Front-line data is surprisingly reliable.
The goal isn’t to panic about your current mix. It’s to understand whether your building’s composition is working for you or against you — and to make informed decisions about renovations, conversions, or pricing from that clarity.
The Bottom Line
Your building’s bedroom count isn’t a floor plan detail — it’s a valuation driver. The right multifamily unit mix strategy increases gross income, reduces operating friction, attracts a wider buyer pool, and positions your asset for long-term appreciation. The wrong mix erodes your returns to one vacancy at a time.
Whether you’re buying, selling, or holding, analyze your apartment building composition against the neighborhood’s actual renter demand. The data is available. The framework is straightforward. The upside is real. And in a market where every dollar of NOI gets capitalized into tens of thousands of valuations, the buildings that get unit mix right will always outperform those that don’t.