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End-to-end ADU design, permitting, and prefab construction

Full-service accessory dwelling unit (ADU) platform that combines proprietary parametric design software with precision-manufactured modular construction. Delivers designed, permitted, and built backyard homes in 4 months for ADUs or 8 months for single-family homes, from foundation to move-in occupancy.

$75M raised Growth Stage
Founded 2014 · Hundreds of completed residential projects across Southern California; exact customer count not disclosed

Why This Tool Exists

The Problem

Homeowners struggle with the fragmented and time-consuming process of designing, permitting, and constructing accessory dwelling units (ADUs). The traditional approach requires coordinating architects, engineers, and contractors over 9-12+ months, with significant regulatory complexity and risk of project delays. Many homeowners abandon ADU projects due to cost uncertainty and permitting barriers.

The Solution

Combines proprietary parametric design software with precision factory manufacturing and modular assembly to compress ADU projects from 9-12+ months to 4 months. Provides end-to-end service from design through move-in, including automated permitting with a guarantee (refund if permits denied). Factory-based production ensures quality consistency while reducing costs to $250-375/sq ft all-in.

How You Use It

Delivery Method
Full-ServiceModular/PrefabIn-House Construction
Disciplines
Construction, Interior Design, Real Estate Development
Project Phases
Pre-Design, Schematic Design, Design Development, Construction Documentation, Bidding/Procurement, Construction Administration, Construction
Project Types
Accessory Dwelling Units, Guest Houses, Home Offices, Single-Family Homes

Data Transparency

Exactly what this tool uses and how

Input
What it needs
Required: Site details, Zoning requirements, Client preferences
Optional: Budget constraints, Existing site survey, Utility locations
Formats: Web form input, Site visit documentation, Photos
Output
What you get
Format: Permit-ready architectural and engineering drawings, manufacturing specifications, site work plan
Fields: Custom ADU design with architectural renderings, Structural and MEP engineering drawings, Permit application packages, Manufacturing specifications for modular components, Installation and assembly instructions, Project timeline and cost breakdown
Algorithm
How it works
Model: Proprietary parametric design engine (not AI-based)
Accuracy: Not publicly specified; implied high accuracy due to permit guarantee on qualified properties
Privacy
How your data is protected
Retention: Project data retained for service delivery and regulatory compliance; not publicly specified for how long after project completion
Training: Not publicly specified
Compliance: CCPA compliant (California), CSLB Licensed (B Class - 1039029), Claims industry-standard security practices
API
Integration
Endpoint: Contact vendor for custom integration inquiries
Method: Not publicly documented

Use Cases

  • · ADU design and construction for homeowners seeking rental income or multi-generational housing
  • · Rapid guest house construction for residential properties
  • · Home office expansion with factory-built quality and speed
  • · Single-family home construction with modular efficiency
  • · Disaster recovery rebuilds (fire, flood) with accelerated timelines
  • · Investment properties for residential real estate developers
  • · Affordable housing solutions through standardized, scalable design

Pricing

Free
Introductory consultation and site visit (no cost)
Pro
S1 ADU starting at $369K (580 sq ft, includes design, permitting, manufacturing, installation, landscaping); Custom pricing $250-375/sq ft total cost
Enterprise
Custom single-family and multi-unit pricing (contact sales)
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Research Sources & Data Quality Last verified: 2026-04-04
Verified Data (17)
problem, solution, deliveryMethod, disciplines, projectPhases, projectTypes, yearFounded, maturityStage, vendor, website, fundingTotal, input-types, output-structure, algorithm-approach, control-features, useCases, pricing
Not Found (8)
integrations-specific, api-documentation, soc2-certification-report, iso27001-certification, algorithm-accuracy-metrics, data-training-practices, exact-customer-count, data-retention-duration
Our Commitment: We only include verified data from official sources. If information isn't publicly available, we mark it as "Not publicly specified" rather than guessing.