What Green Galaxy Builders, Inc. does

Green Galaxy Builders, Inc. is a Santa Clara, California-based construction company founded by Navy veteran Michael McCarthy that designs and builds custom residential structures using Structural Insulated Panels (SIPs) and modular construction methods. The company serves three primary customer segments in the Bay Area: individual homeowners seeking single-family custom homes, real estate investors building multi-family projects, and property owners adding Accessory Dwelling Units (ADUs), with a supplementary offering of major renovations and land development consulting. A sub-brand, Green Galaxy Homes, operates as a marketplace of pre-designed floor plans intended to lower the friction and cost of commissioning a SIP-built home.

The company's core technology stack is the factory-controlled manufacturing of SIP assemblies — factory-cut insulated panels shipped to the build site for rapid assembly — supported by a proprietary "Smarter Building Solutions" methodology organized around a two-phase design-build process. The firm claims a 25% reduction in build time, 60% reduction in on-site labor, and 20% reduction in material costs relative to conventional stick-built construction, and offers a 20-year structural warranty on SIP assemblies. Execution is supported by a permanent in-house trades team led by a supervisor with 45 years of experience and a zero-failed-inspection record, an unusual structure in a fragmented industry that relies heavily on subcontracted labor.

The business model is project-based construction revenue: each home, ADU, or multi-family project is sold as a fixed-scope design-build engagement, with revenue recognized on project completion and milestone billing. Indirect go-to-market leverage comes through partnerships with the Structural Insulated Panel Association (SIPA), APB, and Coldwell Banker — the last of which provides a real estate brokerage channel for buyer referrals. The self-reported customer base includes hundreds of Bay Area homeowners for single-family builds and dozens of investors for multi-family projects, consistent with a small-team (11-50 employees) operation that has scaled organically over roughly a decade without disclosed external funding.

Name

Green Galaxy Builders, Inc.

Legal name

Green Galaxy Builders, Inc.

Website

https://greengalaxybuilders.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

11–50 employees

Short description

Green Galaxy Builders is a Santa Clara-based custom home builder using Structural Insulated Panels and modular construction to serve Bay Area homeowners, multi-family investors, and ADU customers, with a sub-brand offering pre-designed floor plans.

Ownership category

akta.pro rank

Product category

Custom Residential Home Building

NAICS

New Single-Family Housing Construction (except For-Sale Builders) (236115), Residential Remodelers (236118), New Multifamily Housing Construction (except For-Sale Builders) (236116)

SIC

Mobile Homes (2451), Land Subdividers & Developers (No Cemeteries) (6552)

akta.pro primary industry

Custom Home Building (IMAFABAC)

akta.pro secondary industries

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Residential Accessory Dwelling Units (ADUs) & Backyard Homes (IMAFABAK)

Keywords

• Custom home construction
• Modular home building
• Structural insulated panels
• Accessory dwelling units
• Residential renovation services

Headquarters

HQ city

Santa Clara

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Custom Home Construction: Full-service custom home building from design through construction completion. Customers engage for complete custom home projects delivered via the company's smarter building solutions. Revenue recognized upon project completion across two phases.
2. Multi-Family Home Development: Construction of multi-family properties ranging from duplexes to 100-condo buildings. Targets investors looking to occupy, rent, or sell for profit. Tax credits may be available.
3. Accessory Dwelling Unit (ADU) Construction: Design and construction of ADUs/in-law units. Provides faster, more affordable ADU solutions for family members or rental income. Full permitting, code compliance, and project management included.
4. Major Renovation and Remodeling: Renovation and extension services for existing homes. Includes major renovations, extensions, and transformations. Process includes design optimization and approval management.
5. Land Development Consulting: Independent advisory services for land development. Triple licensed real estate professionals provide honest advice on property optimization, land valuation, and development potential. May lead to construction engagement.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Green Galaxy Builders, Inc. designs and builds custom residential homes in the San Francisco Bay Area using Structural Insulated Panels (SIPs) and modular factory prefabrication. Its core offerings are single-family custom homes, multi-family homes, accessory dwelling units (ADUs), major home renovations, and land development consulting for individual homeowners and small-scale real estate investors.

Product overview

Green Galaxy Builders, Inc. is a custom home construction company offering a portfolio of building services centered on their Smarter Building Solutions platform. The core offerings include Single Family Homes, Multi-Family Homes (duplex to 100-unit condos), Accessory Dwelling Units (ADUs), and Major Renovations, all utilizing Structural Insulated Panels (SIPs) and prefabricated construction methods. Supporting services include Land Development Consulting, Modular Homes, and Manufactured Homes. The company differentiates through two-phase construction (Structure then Finishes), offering 25% faster delivery, 60% less labor costs, and 20-year warranties on SIP panels. Their project portfolio includes completed homes such as Pinecrest, Lorina, Redwood City, Maddison, and Sieta Court.

Differentiator

Problem solved

Functional benefit

Brands

• Green Galaxy Homes: A subdivision of Green Galaxy Builders focused on prefabricated modular homes and floor plans

Products and services

• Single Family Homes

Quantifiable outcome

• 25% faster construction timeline
• +7 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered minor and core.

• Association of Professional Builders (APB)minorGTM or Marketing PartnerProfessional builder association providing marketing support, credibility, and industry best practices. Logo displayed on website footer indicating membership and affiliation.
• Structural Insulated Panel Association (SIPA)coreTechnology or IntegrationIndustry association for SIP manufacturers and builders. Affiliation indicates commitment to SIP construction standards and access to industry resources and networking.
• Coldwell BankerminorChannel Partner/ Reseller/ DistributorReal estate brokerage relationship. Agent Michael McCarthy listed on Coldwell Banker Homes platform. Provides real estate transaction capabilities and referrals for land development clients.
• Green Galaxy Homes (greengalaxyhomes.com)coreStrategic or Co-development PartnerRelated entity operating prefab floor plans marketplace and ADU inventory platform. Separate website offering prefab homes and floor plans for direct purchase. Complementary brand serving different customer entry points.

Scale indicators10 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Plant Prefab: California-based prefabricated home builder using factory-built modular and panelized systems for custom single-family and multi-family projects. Most directly comparable to Green Galaxy's SIP-based prefab model and Bay Area service area.
• Dvele: Smart prefab home builder combining factory precision with integrated home technology for custom luxury residences. Comparable in factory-built SIP/modular construction targeting premium Bay Area and California buyers.
• Factory_OS: Prefab multifamily housing manufacturer using factory-built modular construction for apartments and condos. Comparable in prefab methodology and multi-family customer segment, though more focused on affordable/workforce housing than luxury.
• Cover (Cover Technologies): Prefab ADU and backyard home manufacturer offering factory-built accessory dwelling units with software-configurable designs. Directly comparable to Green Galaxy's ADU product line and prefab manufacturing approach.
• Method Homes: Custom modular home builder producing prefabricated single-family and multi-family residences in factory-controlled environments. Comparable in prefab custom home positioning, project portfolio depth, and premium customer targeting.
• Connect Homes: Prefab modular home company using steel-frame factory-built modules for custom residential projects. Comparable in factory-controlled prefab methodology serving design-conscious custom home buyers in California.
• Cottage (by Turkel Design): Prefab ADU design and manufacturing company producing factory-built backyard cottages. Directly comparable to Green Galaxy's ADU offering, particularly around productized floor plans and faster permitting.

Broad incumbents

• Toll Brothers: National luxury homebuilder operating across multiple U.S. markets including Northern California. Larger incumbent serving custom and luxury home buyers with broader geographic reach, providing scale and capital benchmarks relevant to Green Galaxy's premium positioning.

Emerging players

• Mighty Buildings: Construction technology company producing 3D-printed prefab ADUs and homes using composite materials. Partial overlap with Green Galaxy's ADU product line, though Mighty Buildings focuses more on additive manufacturing than SIP panels.
• Blu Homes: Prefab steel-framed home manufacturer offering foldable factory-built residences for custom buyers. Partial overlap with Green Galaxy's prefab approach, though Blu Homes has historically operated at smaller scale post-restructuring.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/greengalaxyinc
• LinkedInlinkedin.com/company/green-galaxy-builders

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Green Galaxy Builders, Inc.