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Casita Model

Casita Modern 400

Contemporary Style. Efficient Living. Designed Around Your Vision.

Size
400 sq ft
Bedrooms
1 Bedroom
Bathrooms
1
Timeline
8–10 weeks
Own from approximately
$597/month
All-inclusive price $84,900

Estimated monthly payment is based on the starting all-inclusive price with a 20% down payment, 30-year amortization, and an estimated 10% fixed interest rate. Monthly payment reflects estimated principal and interest only and does not include property taxes, homeowners insurance, utility connections, permits, lender fees, or other project-related costs. Final pricing and payments will vary based on financing approval, selected customizations, site conditions, and the final scope of work.

Casita Modern 400 — 400 sq ft ADU casita

About this casita

The Casita Modern 400 is a beautifully crafted contemporary ADU that combines clean architectural lines, modern finishes, and exceptional functionality in a compact footprint. Featuring approximately 400 square feet of proposed living area, this thoughtfully designed home offers the perfect balance of comfort, efficiency, and style while serving as a fully customizable foundation for your dream space.

Every Casita Modern 400 is fully customizable, allowing you to personalize the floor plan, interior finishes, exterior materials, and architectural details to complement your lifestyle and property. Whether you're creating a guest house, rental investment, home office, private retreat, or independent living space, the Modern 400 can be designed specifically around your needs.

Inside, the open-concept layout maximizes every square foot, creating a bright and inviting living area that seamlessly connects the kitchen, dining, and living spaces. The efficient floor plan provides everything you need without sacrificing comfort, making it ideal for everyday living or generating additional rental income.

The private bedroom offers a peaceful retreat with generous storage, while the modern bathroom is designed for both style and practicality. Throughout the home, oversized windows flood the interior with natural light, creating an open, airy atmosphere that makes the living space feel larger and more welcoming.

The exterior showcases a sleek contemporary design accented with warm wood architectural details, creating a striking balance between modern sophistication and natural beauty. These premium design elements enhance curb appeal while giving the Casita Modern 400 a timeless appearance that fits beautifully into any Arizona neighborhood.

At Prime Builders, we believe your home should reflect your unique vision. The Casita Modern 400 is more than a floor plan—it's the beginning of a custom-built home designed around your lifestyle, preferences, and long-term goals.

Modern Design. Maximum Value. Built for Your Lifestyle. The Casita Modern 400 delivers contemporary architecture, efficient living, and complete customization in one beautifully designed home. Whether you're expanding your property's living space, creating an income-producing rental, or building a private retreat for family or guests, Prime Builders will guide you through every step—from design and permitting to construction and final completion. Schedule your complimentary site consultation today and begin designing your custom Casita Modern 400.

What's included

  • Approximately 400 Square Feet of Living Space
  • Fully Customizable Floor Plan & Finishes
  • 1 Comfortable Bedroom
  • 1 Full Bathroom
  • Open-Concept Kitchen, Dining & Living Area
  • Contemporary Modern Architecture
  • Elegant Wood Accent Details
  • Oversized Energy-Efficient Windows
  • Bright Open Interior Filled with Natural Light
  • Premium Quality Materials & Craftsmanship
  • Energy-Efficient Construction
  • Ideal for ADUs, Guest Homes, Rental Properties, Vacation Casitas, Home Offices, or Independent Living

Photos

Built by Prime.

Comparable build: 6345 N Grandview, Phoenix · See full gallery

Floor plan

400 square feet, laid out right.

Casita Modern 400 floor plan
Casita Modern 400 — Floor Plan

Floor plans are representative. Layout, window placement, and finishes are customized to your lot and preferences during design.

FAQ

Casita Modern 400 questions, answered.

Free Assessment · 24-Hr Reply

Begin your build.

$0 down
Estimated monthly
$489/month
All-inclusive price $69,900 · financing $69,900 @ 7.5% for 30 yrs

Estimate only. Actual rates and terms subject to lender approval.

No obligation. Initial assessments returned within 24 business hours.