Modular Housing System

What Modular Housing System does

MHS Building Systems (legally Modular Housing Systems / DBA MHS Building Systems) is a privately held structural engineering and design-build firm headquartered in Irvine, California, that develops and commercializes a patented post-and-beam aluminum framing system for modular prefabricated structures. The company was established by senior architectural engineer Tim Siahatgar and operates across residential, commercial, and government segments, delivering projects ranging from ADUs and single-story prefab structures to 3-4 story modular tall buildings with double-skin facades. Its core intellectual property is the MHS Structural Aluminum Framing Assembly, which is certified under QAI Code Evaluation Report (CERUS-1039) for Type V construction and is positioned against conventional wood framing on seismic performance, fire performance, recyclability, and construction speed.

The business operates three revenue streams: (i) hardware sales of MHS framing components and prefab modules, (ii) professional design and build services delivered through global Design and Build studios, and (iii) technology licensing to certified licensees and international partners who establish MHS-based prefab facilities abroad. Distribution combines direct enterprise engagement from the founder with a certified licensee network of fabricators and authorized contractors. The company also operates Kithaus as a consumer-facing sub-brand for prefab ADUs, and has received third-party validation including a Visionary Review A Design Award (2022-2023) and Architizer A+Product Awards finalist status (2025).

Operationally, MHS runs a lean organization (11-50 employees) with no disclosed external institutional investment, no public financials, and active project presence in California, Florida, Georgia, and Dubai. Geographic expansion is pursued primarily through licensing rather than owned operations, and the company has not disclosed revenue, funding, or headcount growth metrics in available materials.

Name

Modular Housing System

Legal name

MHS Building Systems

Website

https://modularhousingsystems.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

11–50 employees

Short description

MHS Building Systems is a privately held Irvine-based structural engineering firm that designs and licenses a patented aluminum post-and-beam framing system for modular prefab buildings, serving developers, investors, corporations, and governments with ADUs through 3-4 story structures.

Ownership category

akta.pro rank

Product category

Modular Prefabricated Construction Systems

NAICS

Prefabricated Metal Building and Component Manufacturing (332311), Fabricated Structural Metal Manufacturing (332312), Plate Work and Fabricated Structural Product Manufacturing (33231)

SIC

Prefabricated Metal Buildings & Components (3448), Prefabricated Wood Bldgs & Components (2452), Fabricated Structural Metal Products (3440), General Bldg Contractors - Residential Bldgs (1520)

akta.pro industry

PRIMARYIMAFABAF

Residential Modular & Prefabricated Home Construction

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Residential Building Construction

SECONDARYIMAFABAE

Residential Design-Build & Renovation-Integrated Builders

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Residential Building Construction

SECONDARYIMAMACAJ

Prefabricated Engineered Wood Building Components (Trusses, SIPs, EWP Kits)

Industrials, Manufacturing & Construction/Paper & Forest Products/Engineered Wood Products (Plywood, OSB, LVL, CLT)

Keywords

• Modular prefab construction
• Aluminum structural framing
• Prefab ADU buildings
• Modular building systems
• Sustainable prefab housing

Headquarters

HQ city

Irvine

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Prefab Building Systems Technology: Sale of MHS patented modular aluminum framing systems and prefab technology components for construction projects ranging from ADUs to commercial pavilions and multi-story structures
2. Design and Build Services: Comprehensive architectural and structural engineering services covering all stages from design to fabrication setup, with personalized service from founder Tim Siahatgar
3. Technology Licensing: Licensing of MHS systems for establishment of prefabricated modular home design and build facilities in other countries, with certified design and build licensees managing projects

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

MHS Building Systems develops and supplies the patented MHS Structural Aluminum Framing Assembly, a post-and-beam aluminum system for modular prefab structures, and delivers turnkey design and build services for projects ranging from ADUs and custom homes to commercial pavilions, shopping mall kiosks, and 3-4 story modular tall buildings. The company also licenses its technology to certified design/build licensees and fabrication partners internationally.

Product overview

MHS Building Systems offers a modular architectural design and structural modular building framing system centered on the patented MHS Structural Aluminum Framing Assembly — a post-and-beam aluminum system for modular prefab structures. The portfolio includes MHS Prefab Modules and MHS Panel Frame Assembly as core framing products, complemented by the Kithaus sub-brand offering modern prefab ADUs. Service offerings span residential (ADUs, custom houses, apartment buildings), commercial (pavilions, mall kiosks), and hybrid modular tall structures. The company provides turnkey solutions from design through fabrication setup, enabling construction from one-story prefab structures to 3-4 story modular buildings with double-skin facades.

Differentiator

Problem solved

Functional benefit

Brands

• Kithaus: Modern prefab ADU brand combining high-tech features with cozy living spaces, utilizing the MHS Structural Aluminum Framing system.

Products and services

• MHS Structural Aluminum Framing Assembly Patented post-and-beam aluminum structural framing system designed for modular prefab structures, offering exceptional strength, energy efficiency, seismic and fire performance, and rapid, low-waste construction with recyclable materials. Sold to prefab developers, investors, corporations, and government clients as the core structural backbone of MHS buildings.
• MHS Prefab Modules Modular aluminum structural modules built using the MHS framing system, designed for rapid assembly and customizable configuration for residential, commercial, and hybrid modular building applications.
• Kithaus ADU Modules Modern prefab Accessory Dwelling Units combining high-tech features with cozy living spaces, built on the MHS Structural Aluminum Framing technology. Offered as a sub-brand for residential buyers seeking modular ADU living solutions.
• Custom House Design Service Custom residential home design and build service using MHS prefab modular aluminum construction, delivered for clients with projects across California, Florida, Georgia, and Dubai.
• Commercial Shopping Mall Kiosk Construction Commercial kiosk structures built with MHS prefab modular aluminum framing for retail and mall environments, delivered to corporate and commercial clients as part of MHS commercial build services.
• MHS Prefab Apartment Building Construction Multi-story apartment building construction using the MHS modular aluminum structural framing system, enabling code-compliant modular tall structures with double-skin facades.
• MHS Technology Licensing Licensing of the MHS Structural Aluminum Framing System to international partners for establishment of prefabricated modular home design and build facilities in other countries, managed through certified design and build licensees who oversee design teams, fabricators, and authorized contractors.

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• KitHauscoreOEM/ Whitelabel/ Licensing PartnerKitHaus is a related company specializing in modern prefab ADUs that combine high-tech features with cozy living spaces, utilizing the innovative M.H.S Structural Aluminum Framing system. KitHaus represents a product line under the MHS ecosystem, offering modular options with pricing, sustainability features, and customization possibilities.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Boxabl: Boxabl designs and factory-produces folded modular homes (notably the Casita ADU) using a proprietary panel system. Directly comparable to MHS as a patented-system prefab housing builder targeting residential and ADU buyers.
• Blokable: Blokable develops configurable, factory-built modular housing blocks for multifamily and residential developers. Comparable to MHS in standardized modular building components serving developers and institutional housing demand.
• Method Homes: Method Homes designs and builds custom modular residential and multifamily projects using prefabricated systems. Comparable to MHS in delivering custom, architect-designed modular homes for residential and developer clients.
• Mighty Buildings: Mighty Buildings uses 3D printing and prefab panelized systems to build net-zero ADUs and homes. Comparable to MHS in prefab panelized construction for ADU and residential customers with a sustainability- and tech-driven value proposition.
• Cover (Cover Building Systems): Cover produces prefabricated backyard studios and ADUs with a configurator and direct-to-consumer sales model. Comparable to MHS/KitHaus as a prefab ADU specialist serving homeowners, with a different (steel-framed) underlying system.
• Dvele: Dvele manufactures tech-enabled, energy-efficient prefabricated homes and ADUs in California. Overlaps with MHS in premium, sustainability-oriented, factory-built California housing aimed at homeowners and developers.
• Plant Prefab: Plant Prefab is a California-based sustainable prefab home manufacturer offering custom and preset residential modules. Overlaps with MHS in modular residential construction, sustainability positioning, and California market focus.
• BrightBuilt Home: BrightBuilt Home is a Maine-based modular home manufacturer focused on high-performance, sustainable net-zero homes. Comparable to MHS in sustainability-oriented residential prefab with an emphasis on energy efficiency.

Emerging players

• Lattice (Resolution Homes): Lattice builds design-forward accessory dwelling units (ADUs) and backyard homes in California using a prefab system. Comparable to MHS/KitHaus in targeting the California ADU market with a standardized prefab product.

Regional players

• KBS Builders (KBS Residential Services): KBS is a regional modular construction firm delivering modular buildings across multiple US states. Comparable to MHS as a modular builder serving developer and institutional projects, but operating as a broader regional contractor rather than a patented-system licensor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/playlist?list=PL7HhCsWv-qkIJj8R3BOfsFL0pUEEtJQ44
• Instagraminstagram.com/mhs_building_systems
• Xx.com/mhsprefab
• LinkedInlinkedin.com/company/modular-housing-system

Compliance2 records

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 Modular Housing System