What is a Model/Z Unit (or ZDU)?

A Model/Z Unit is our advanced version of an ADU, is an Accessory Dwelling Unit, which is a secondary housing unit, often a smaller self-contained dwelling, located on the same lot as a primary residence. It provides independent living facilities for one or more persons, including a kitchen, bathroom, and sleeping area. Whether it’s a single unit in a backyard or part of a larger development, a Model/Z Unit is designed to be installed quickly, perform efficiently, and last for decades.

What can I use a Model/Z Unit for?

Model/Z Units are highly versatile:

• Independent rental unit for generating income

• Private living space for family members or guests

• Additional housing to support multigenerational living

• Multi-unit configurations for larger developments

How do I get a Model/Z Unit?

It’s simple. Start by claiming your unit and contacting our team at info@model-z.com. A Model/Z advisor will review your lot, confirm it qualifies, and help you plan the best placement for maximum value. Once on site, installation can be completed in less than 8 weeks.

Can I customize my Model/Z Unit?

Yes. Every Model/Z Unit can be tailored to fit your needs and style. Options include:

• Four exterior finish packages curated by our design partners

• Customizable porch designs

• Solar-ready roof with optional battery storage

• ADA-friendly layouts with zero-step entries and grab bar blocking

• Flexible configurations — our module library supports duplex, fourplex, and townhouse clusters without redesign

What materials and features are used in a Model/Z Unit?

Our units are built for strength, safety, and comfort:

• Seismic-ready steel frame engineered to meet LA’s most rigorous earthquake standards

• 95% non-combustible materials for superior fire resistance

• Premium insulation for year-round comfort and energy savings

• Healthy, eco-friendly finishes including low-VOC paints, water-saving fixtures, and recycled-material countertops

• Discreet fire sprinklers built in without impacting design

• ENERGY STAR® appliance suite, LED lighting, and smart wiring for future upgrades

What type of foundation is needed?

Model/Z Units can be placed on:

• Slab-on-grade foundation – poured and set within days

• Simple anchor rod + pressure-treated wood system – a streamlined alternative depending on site conditions

What utility connections are required?

Each unit needs:

• Water line connection

• Main sewer connection

• Electrical connection

How much does it cost to transport and install a unit?

• Transport: $2,000–$3,000 per unit (depending on distance and route)

• Site prep & connections: $10,000–$25,000 (varies by site condition and scope of work)

How much space do I need?

• Single unit: ~1,050 sq. ft. (42' x 25') of clear space

• Two-pack units: ~1,700 sq. ft. (42' x 40') of clear space

How is heating and cooling handled?

Each Model/Z Unit includes a built-in PTAC system (heating + cooling) with ductwork for exhaust and fresh air built in.

Are modular Model/Z Units noisier than traditional homes?

No. Our structural steel and sureboard construction actually makes them quieter and more soundproof than most traditionally built homes.

Can I create larger homes using Model/Z Units?

Yes. Configurations can be built as two-, three-, or four-bedroom layouts, allowing for larger family accommodations or multi-unit setups.

How durable is a Model/Z Unit?

Each unit passes through 383+ quality control checkpoints and state inspections. Materials are chosen for strength, longevity, and low maintenance—similar to standards in aerospace and automotive manufacturing.

Who handles maintenance?

Our units are designed so most repairs can be completed quickly by a local handyman or electrician. Key systems are accessible along one utility wall, making servicing faster and simpler than in traditional homes. We also plan to train local teams in Model/Z maintenance for ongoing support.

How does Model/Z build so quickly?

We follow a precision manufacturing flow inspired by the automotive and aerospace industries:

• Sub-assemblies (walls, ceilings, MEP systems, cabinetry) built in parallel

• Final assembly line optimized for minimal downtime

• Current output: 3 units/day, scalable to 4 per shift

Pre-finished components like painted doors, cabinetry, and pre-cut plumbing save time, improve consistency, and reduce waste.

What makes Model/Z different from other modular builders?

• In-house engineering team designing every unit for manufacturing (DFM)

• Digital twin technology for traceability and consistency

• Over 400 inspections before delivery

• Controlled factory environment for higher quality and fewer surprises

What happens before my unit arrives?

• All systems, finishes, and quality checks are completed in our factory

• The unit is wrapped in protective material and shipped to your site

• Onsite crews connect utilities and complete installation in days

Can I rent out my Model/Z Unit right away?

Yes. Our units are pre-approved to meet Los Angeles’ strict building codes, HUD’s Section 8 standards, and Federal ADA guidelines, meaning they are rental-ready from day one. Depending on your location, you could earn thousands month in rental income.

How do I know what I could earn from renting my unit?

We can help you calculate potential rental income based on your property’s location and market demand. Calculate your potential rental income here.

Are Model/Z Units environmentally friendly?

Yes. Every unit is designed to reduce environmental impact without sacrificing comfort or functionality. Compared to traditional construction, producing 3,500 units per year saves:

• 6,395 metric tons of material waste

• 16,800 metric tons of GHG emissions annually

Still have questions?
Contact our team here to learn how a Model/Z Unit could work for your property or project.