Modern kitchen with black and wood cabinetry, a black marble backsplash with gold veins, a small kitchen island with beige chairs, pendant lights, a microwave oven, a potted plant, and decorative black vases.

Accessory Dwelling Units | ADUs

Smaller detached structures like casitas, also known as accessory dwelling units or ADUs, are one of the most common ways homeowners add flexible living space to their property. These spaces can be used in a variety of ways including guest houses, multigenerational living for aging family members who want to live closer to home, backyard offices, or even private rental units.

Pricing typically starts around $280 per square foot, with final pricing depending on the size of the structure, site conditions, utilities, and finish selections.

Turnkey Construction

Every ADU built by Capricorn Concepts is delivered fully turnkey.

Our ADU pricing includes:

Architectural plans
Permit coordination and permitting fees
Site preparation and foundation construction
Structural framing, roofing, and exterior finishes
Electrical trenching and full electrical installation
HVAC system installation
Plumbing connections and fixtures
Interior finishes including cabinetry, countertops, flooring, and trim
Appliance installation where applicable

A small white house with a stone pathway leading to a door with glass panes, surrounded by green plants and bushes.

ADU and casita construction costs vary depending on size, utilities, and interior finishes. Our projects typically start around $280 per square foot. Explore the models below to find a layout that fits your needs. These floor plans can be customized to suit your property and individual needs. If you already have plans or a different design in mind, Capricorn Concepts can also build directly from your plans.

A small modern outbuilding or guest house with a light-colored brick exterior, black framed glass door, and two vertical black wall-mounted lights. It is situated in a landscaped yard with plants and a wooden fence, with trees in the background and warm lighting inside.

Modern house with stone exterior, large glass sliding doors, and a sloped roof with exposed wooden beams. The house is illuminated from inside, with potted plants outside, surrounded by trees at dusk.

A modern white house with a gray shingled roof, black-framed windows and door, black wall panels, and a small front patio with outdoor seating, surrounded by lush green grass, bushes, and trees.

SANTA ANA

2 BED | 1 BATH

A small house with a sign that reads "office" above the door, surrounded by trees and landscaped garden. The interior is visible through large glass sliding doors, showing a cozy workspace with a desk, chair, and side table.

MEREDITH

BACKYARD OFFICE

A charming white house with black accents, surrounded by a lush well-manicured lawn and vibrant white flowers, with trees and a white fence in the background.

FAIRVIEW

1 BED | 1 BATH

Modern black house with large glass windows in a forest setting, outdoor seating area, fire pit, and landscaped rocks and plants.

DURANGO

1 BED | 1 BATH

Front view of a modern white house with black doors, surrounded by a well-maintained garden with colorful flowers and green trees in the background.

CEDAR CREEK

1 BED | 1 BATH

A modern two-story house with a garage, large glass doors and windows, surrounded by trees and a grassy yard.

ARAPAHOE

GARAGE APARTMENT

Contact Us

Ready to start your project? Tell us a little about what you have in mind and we’ll be in touch shortly. Capricorn Concepts is known for delivering high-value homes that appraise strongly at completion, with clear communication, realistic scheduling, and transparent pricing every step of the way.