ADU plans that are fully designed inside & out and GC-ready.

Explore our fully-detailed ADU plans perfect for in-law suites & backyard guest homes. Each design is accompanied by interior & exterior design specifications, crafted for easy construction while prioritizing durability & long-term energy savings.

Luminary ADU, 800SF, 2 bedrooms, 2 bathrooms

Available Spring 2024

Luminary meets the demand for dual bathrooms, boasting two bedrooms and full bathrooms. The expansive common area showcases ten-foot ceilings, ample light from large and clerestory windows. The kitchen integrates built-in appliances and contemporary finishes. The design is highly buildable with 2×6 advanced framing, a slab-on-grade foundation, and a compact 32×26 footprint.

Endeavor ADU, 800SF, 1 Bedroom, 1+ Bathroom

Available Spring 2024

A luxurious one-bed, 1+ bath ideal for aging in place and entertaining. Inspired by Scandinavian farmhouses, it effortlessly integrates into the Carolinas with its distinctive high-pitched gable roof. The common areas are super airy with cathedral ceilings and many windows, providing a spacious and light-filled atmosphere. 24-foot width by 34-foot length footprint fits within most lots.

Ascension Home XL, 800SF, 2 Bedroom, 1 Bathroom

City of Raleigh Pre-Reviewed

A 2-bedroom, 1-bath offering with 800 gross square feet and 75 square feet of outdoor deck area. It easily accommodates a small family while still feeling open and airy due to the generous windows, the 9 foot ceiling height, and the spacious kitchen. Its 24-foot width by 32-foot length footprint fits within most lots. Available in two colors.

Ascension Home L, 630SF, 1 Bedroom, 1 Bathroom

City of Raleigh Pre-Reviewed

A 1-bedroom, 1-bath offering with 630 square feet of interior space and 75 square feet of outdoor deck area. It easily accommodates a single person or a couple while the floor plan feels open and airy due to the generous windows, a nine-foot ceiling height, and a spacious living room. Its 24-foot width by 24-foot length footprint fits within most lots. Available in two colors.

Why Atmos Arc Pre-Designed

At the heart of our offerings lies a response to the pressing housing shortage, aiming to swiftly increase housing stock with enduring and well-designed structures.

Explore our collection of intelligently-designed small homes. Each thoughtful floor plan is accompanied by comprehensive design specifications in a construction drawing set of 24-inch by 36-inch sheets, 40-50 pages in a full set, —ready for your contractor to seamlessly implement.

The principle of economies-of-scale steers us toward prioritizing everlasting materials and finishes. We know at an ADU scale, budget considerations are actually influenced by buildability, structure, and material availability. Thus, In contrast to conventional builder homes, we eschew standardized materials sourced from the builder’s storage warehouse. Instead, each small home features top-tier materials, optimal mid-range budget appliances and fixtures, fiberglass windows, in short, quality finishes both inside and out.

Our dedication to exceptional design and resilient construction is rooted in the belief that, at the modest scale of 800 square feet, investing in an architect’s expertise yields substantial returns. Choosing enduring quality for your ADU guarantees decades of satisfaction and a home built for legacy.

Upon purchasing a license to our ADU house plans, you receive the complete design in your set of drawings which includes interior design. The drawings also contain product selections of: energy-star appliances, interior finishes, plumbing fixtures, lighting, HVAC equipment, and much more. In short, there is no need for additional involvement by a designer and is ready to hand off to the general contractor to start building once you have obtained a building permit.

What You Get With Your Purchase

When you acquire a license for our ADU designs, you’ll receive digital House Plans, also known as Construction Documents.

Construction Documents encompass the written and graphic materials crafted by the Architect to articulate and convey the design, structure, and physical attributes of a building project. These documents are essential for obtaining building permits and serve as the required documentation for managing the construction contract between the owner and the General Contractor. Our ADU House Plans comprise a comprehensive construction document set, ready for your contractor to execute into a physical building! The document set includes, at a minimum, the following:

  • Roof framing and floor framing plans and schedules indicating the size, section, and relative locations of all structural members in the ADU.
  • A foundation layout including foundation walls and footings. (For the prefabricated steel foundation, the foundation layout and foundation components must be confirmed by the foundation manufacturer once they receive geotechnical information of the project site’s soils and topography.)
  • Sections and details demonstrating how all architectural and structural components come together
  • Structural connections and fastener schedules
  • Floor plans, framing elevations, building elevations, building sections, ceiling plan, power plan
  • Enlarged plans & elevations indicating the design of the kitchen and bathroom
  • Schedules specifying door panels, window types, light fixtures, appliances, stock casework, exterior finishes, interior finishes, building insulation types, recommended joint sealants, door hardware types, cabinet hardware, plumbing fixtures, toilet accessories
  • Typical architectural details of how various components such as doors, windows, finishes, millwork should be assembled
  • Enlarged wall sections indicating assembly of exterior finishes, building insulation, flashing, structure, and interior finishes
  • Architectural roof details
  • Interior partition types
  • Air sealing details
  • Interior design elements such as interior doors, floor finishes, wall finishes, and casework specifications
  • Designed elements such as: canopy design, guardrail and post design, decorative bathroom details such as glass shower panel installation, recessed medicine cabinet, recessed appliance installation, joint details, finish termination details.

Constructing a building is a complex process that requires the coordination of numerous trades and components. While it can be a meticulous service, having the right set of construction documents makes the building process not only rewarding but also somewhat easier. Additionally, unlike most house plans that lack interior design details, we have gone above and beyond to provide thoroughly-detailed, ready-to-build documentation. This requires no further involvement on our part and minimal effort on your end!

    • a digital file of the 34×22 inch Construction Documents set in PDF Format: (CAD files available for additional fees)
    • 30 minute consultation directly with the Architect
    • 30 minute drawing hand-off discussion between the Architect and your General Contractor
    • Architect Availability  (within reason) to answer questions your GC or you may have

    Upon acquiring a license for our designs and construction documents, you’ll need to sign our (five-page) Terms & Service agreement. This document outlines critical aspects, including the House Plans Scope of Work and Deliverables, Architect’s Responsibilities, Recommended Responsibilities for the Purchaser, Usage Rights of the Documents, Indemnification, Limit of Liability, and various other provisions.

Cost to Build Your ADU

While we have put forth every effort to design an affordable small home, the final pricing is subject to various factors, particularly the variability and approach of contractors, along with market fluctuations.

As of January 2024, the estimated cost to build an ADU in Raleigh, North Carolina ranges from $240 to $350 per square foot. In different jurisdictions, construction costs can escalate to $500 per square foot. Considering the market’s material price volatility, variations in construction labor, diverse site conditions, utility connections, inflation, and General Contractor factors like the number of projects, GC profit, and overhead, we strongly advise bringing on a general contractor early for current construction estimates.

It’s crucial to recognize that each contractor and subcontractor may price a project differently. We recommend obtaining estimates from at least three different contractors for comparison. Keep in mind that ADUs typically cost more per square foot than regular-sized homes due to economies of scale. With smaller square footage, the same amount of labor needs to be distributed over a smaller area, making small homes comparatively more expensive on a per-square-foot basis (but not overall).

Recently, we’ve observed a variability of 25-40% among contractors in some cases. Stressing the importance of speaking with multiple contractors cannot be overstated.

The most effective cost-cutting strategy for a small home involves designing an efficient structure (foundation, exterior walls, roof), reducing construction time, choosing reputable material manufacturers that warranty their materials.

Given the home’s size, opting for cheap finishes will not significantly impact the overall price, but can actually impair the long-term value.

Where you should expect to see savings in our ADUs over the average ADU build:

  • Soft Fees: Traditional design fees, typically 10% to 25% of total construction costs, are avoided by using pre-designed house plans. This not only saves four to six months of design time but also results in savings of $30,000 to $50,000 in design fees.
  • Manufactured Foundation System for some of our ADU designs: This system requires minimal excavation (moderate site grading for drainage and minimal excavation for utilities only), saving several weeks of construction time.
  • An efficient structural design leads to quicker construction by facilitating easy installation and simplified material sourcing.
  • Long-term Energy Savings: Achieved through a tight building envelope and the use of energy-star appliances.
  • No Large Machinery Needed: Design considerations for potential narrow or limited access to the backyard mean that all materials can be placed and installed by hand or using small machines such as jackhammers.
  • Longevity & Durability: Our homes are designed for lasting durability, featuring high-quality finishes like fiberglass windows, standing seam roofs, and engineered wood floors. This design approach contrasts with generic builder homes that may require frequent maintenance and premature finish replacements.

Custom Solutions

Should you desire personalized design solutions, you may engage us for supplementary services based on the rates below. None of this is obligatory, feel free to rely on your General Contractor for any of these additional services.

  • Preliminary Site Consultation (Remote) – $150 If you need assistance in identifying the optimal location within legal setback limits on the candidate lot, we can help determine where your ADU can be built.
  • Site Plan for Permitting – $750 – If you require a site plan for your permit application, indicating the ADU location within legal zoning restrictions, grade elevations, and dimensions, you can engage us for this service, subject to architect availability. A site survey is necessary for this service.
  • Custom Plan Modifications to the Standard Design – $95 per hour – If you wish to modify the standard design. Please be aware that any changes to a pre-designed planset may likely initiate a full review process by the City, which could extend the review timeline by an additional two weeks. Feel free to contact us with your proposed changes, and we will provide a quote for pricing, fees, and a timeline.
  • ADU Interior Design Flat Fee – $1,900 – If you desire a more distinctive interior design than the default options, we can collaborate with you to customize the general interior finishes, kitchen details, and bathroom finishes.

If you have any ideas, concerns, or questions about your custom solutions that are not covered here, don’t hesitate to contact us.

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