The case for duplex construction in 2026 has never been more compelling, and the numbers behind that statement are hard to ignore. CBRE reports that owning a home now costs more than twice as much per month as renting, and only roughly 12.7% of renters can currently afford to buy a median-priced home in their market, a dynamic that is driving sustained rental demand across virtually every metro area in the country. The average age of first-time homebuyers reached 40 for the first time in 2025 according to the National Association of Realtors, with first-time buyers comprising just 21% of the total market, meaning a growing wave of long-term renters is filling units and renewing leases at historically high rates.
Renewal rates have climbed to 57% of all leasing activity, up from 51% in 2015, giving landlords and duplex investors more predictability and stability than the market has seen in a decade. W.L. Martin Home Designs has been paying close attention to all of this, and we are excited to announce that our duplex plan collection is expanding with new innovative designs that give developers exactly what they have been asking for, including a first look at the new duplex Plan #24672.
The gap between duplex demand and duplex supply is one of the most significant opportunities in residential development right now. NAHB data shows the “missing middle” construction sector, which includes duplexes and small multi-family properties, totaled just 4,000 starts in the third quarter of 2025, representing only 3% of total multifamily production nationwide. That is a staggering undersupply relative to the renter demand that CBRE and PwC both confirm is structurally supported for years to come, and it creates a direct opening for developers who can move quickly with a construction-ready duplex plan in hand. The new designs coming from W.L. Martin Home Designs are engineered precisely to fill that gap, giving builders a ready-to-purchase path to duplex construction without the months of custom design time and thousands of dollars in architectural fees that have historically slowed developers down before they ever break ground.
The all-new duplex Plan #24672 is a standout example of where our duplex design philosophy is headed. Each unit in this two-story duplex delivers 1,481 square feet with 3 bedrooms, 2.5 bathrooms, and an attached 1-car garage, giving developers two fully livable, rentable, and highly marketable units on a single lot footprint. What makes this plan genuinely versatile is the range of buyer and tenant profiles it reaches simultaneously. The open-concept main level, paired with a TV alcove upstairs that expands the entertainment space beyond the living room, gives each unit the kind of flexible lifestyle zones that today’s renters and buyers consistently rank among their most requested features in new construction. A half bathroom on the main level handles guest access without a trip upstairs, while the upper-level primary suite offers the private retreat that families and long-term tenants specifically look for when committing to a lease or purchase.
Versatility is at the core of what developers have been asking W.L. Martin Home Designs to deliver in our duplex expansion, and Plan #24672 answers that call directly. A 3 bedroom, 2.5 bathroom layout per unit reaches young families, working couples, roommate configurations, and downsizing renters who want more space than a standard apartment but the flexibility of a rental. The attached garage on each unit adds the everyday practicality that young families and professionals consistently prioritize, while the open-concept main level and upper-floor TV alcove give each side of the duplex a lifestyle feel that commands stronger rents and broader tenant appeal than a standard box layout. Developers who have built from previous W.L. Martin plans have reported measurable savings on material costs and construction timelines, and the new duplex designs in our expanding collection were built with that same cost-conscious, builder-tested discipline from the ground up.
W.L. Martin Home Designs’ growing duplex plan library, including the new Plan #24672 and many other popular existing plans, represents one of the most comprehensive “Affordable by Design” duplex collections available for direct purchase. For developers and investors searching “duplex house plans for sale,” “3 bedroom duplex plan with garage,” or “two story duplex plans for developers,” our collection gives you construction-ready designs you can buy today and start building toward your next rental portfolio or multi-family investment without a single day lost to custom design timelines. Browse the full plan collection at wlmartinhomes.com and be among the first to purchase Plan #24672 today.