What Garland Mill does

Garland Mill is an integrated Design + Build firm headquartered in Lancaster, New Hampshire, serving individual homeowners, families, and a smaller set of commercial clients and non-profits across northern New Hampshire and Vermont's Northeast Kingdom. The modern construction company was founded in 1985 by Tom Southworth at the site of an 1856 water-powered sawmill listed on the National Register of Historic Places; in 2025, Tom and Harry Southworth sold the firm to their sons Ben and Dana, and the company transitioned to a worker-owned cooperative, marking the third generational ownership transfer of the historic mill. The firm employs 15–20 people across design, carpentry, project management, and business management, with no third-party resellers or marketplace channels.

The firm specializes in custom high-performance residential and light commercial construction, with a particular focus on net zero, Passive House-inspired, and super-insulated all-electric buildings. Core building science techniques include dense-packed cellulose wall assemblies, Structural Insulated Panels (SIPS), triple-paned windows, ERV/HRV mechanical ventilation, air-source and ground-source heat pumps, solar PV, battery storage, and EV charging, with homes routinely tested to 0.41–0.6 ACH50 air tightness. Projects move through a structured design phase (Intake, Pre-design, Schematic Design, Design Development) billed hourly at approximately 10% of total construction cost, followed by a Construction Agreement with a 20% deposit and monthly invoicing against a line-item budget over a 9–12 month construction period.

The primary customer segment is individual homeowners and families (custom high-performance homes, net zero, Passive House, deep energy retrofits, off-grid, multi-generational, retirement), supplemented by commercial clients and non-profits. The portfolio of 30+ projects includes the LEED Platinum-certified Holderness deep energy retrofit, the 23 Ammonoosuc commercial renovation (Plan NH 2020 Merit Award), the 2011 NESEA Net Zero Home competition runner-up Lancaster Passive House, and the recently launched 79 Main Street affordable housing development in Lancaster, NH. Marketing is relationship-driven, relying on a project portfolio, referrals, NESEA Solar Tours, a registered apprenticeship program with ApprenticeshipNH and the US Department of Labor, and a regional high school trades and building sciences scholarship.

Name

Garland Mill

Legal name

Garland Mill

Website

https://garlandmill.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

11–50 employees

Short description

Garland Mill is an integrated Design + Build firm in Lancaster, NH, serving northern New Hampshire and Vermont's Northeast Kingdom. Founded in 1985 and now a worker-owned cooperative, it specializes in high-performance net zero, Passive House, and super-insulated all-electric residential and light commercial construction.

Ownership category

akta.pro rank

Headquarters

HQ city

Lancaster

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Custom Design + Build Services: Garland Mill provides end-to-end custom design and construction services for residential and commercial buildings. Revenue is generated through a phased billing structure: design fees billed hourly (approximately 10% of total construction cost) during the design phase, followed by a 20% construction deposit and monthly invoicing against a line-item budget during construction. Projects range from deep energy retrofits to new net zero homes to light commercial builds.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

Garland Mill is an integrated Design + Build firm that delivers custom high-performance residential and light-commercial buildings in northern New Hampshire and Vermont. The firm combines architecture, design, and construction under one roof to build net zero, Passive House-inspired, super-insulated, all-electric homes as well as deep energy retrofits, off-grid homes, timber frame structures, and commercial renovations. Engagement begins with a consultative meeting, proceeds through hourly-billed design phases, and concludes with a construction agreement including a 20% deposit and monthly line-item invoicing.

Product overview

Garland Mill operates as a unified design-build firm offering integrated architectural and construction services for high-performance residential and commercial buildings. The core offering centers on Design & Build Services, supplemented by specialized construction types including Net Zero Homes, Passive House Construction, Deep Energy Retrofits, Off-Grid Homes, Timber Frame Structures, and Commercial Projects. The company also provides workforce development through a Registered Apprenticeship Program and an annual Trades and Building Sciences Scholarship. All projects emphasize sustainability, craftsmanship, and energy efficiency, with most residential work incorporating super-insulation, renewable energy systems, and mechanical ventilation.

Differentiator

Problem solved

Functional benefit

Products and services

• Design + Build Services Integrated architectural design and construction services that bring architects, designers, and builders together under one roof to deliver custom high-performance residential and commercial buildings. The firm manages design, project management, and construction through a single point of contact, with a phased engagement (Intake, Pre-design, Schematic Design, Design Development, Construction) targeting net zero, Passive House, and super-insulated outcomes.
• Net Zero Homes All-electric homes designed to produce as much energy as they consume on an annual basis, incorporating super-insulation, solar photovoltaic panels, battery storage, and mechanical ventilation with heat recovery. Suited to homeowners in northern New England seeking to remove buildings from fossil fuels.
• Passive House Construction Buildings designed to the Passive House standard, achieving ultra-low energy requirements through highly insulated thermal envelopes, triple-paned windows, and mechanical ventilation with heat recovery, with select projects certified or designed to PHIUS standards. Targeted at clients prioritizing the highest tier of energy performance and indoor comfort.
• Deep Energy Retrofits Comprehensive renovation projects that dramatically improve the energy performance of existing buildings through insulation upgrades, air sealing, window replacement, and integration of heat pump systems and renewable energy. Includes commercial retrofits such as the award-winning 23 Ammonoosuc project and the Holderness deep energy retrofit (LEED Platinum).
• Off-Grid Homes Self-sufficient residential buildings designed to operate independently from utility infrastructure, incorporating solar arrays, battery storage, wood heating, and sustainable water systems. Targeted at owners in remote northern New England locations seeking energy independence.
• Timber Frame Barns and Outbuildings Custom timber-framed barns, garages, and accessory structures featuring traditional joinery techniques combined with modern building science, often incorporating renewable energy systems (e.g., 19 kW solar array with battery back-up) and multi-use designs (workshop, office, guest sleeping, kitchenette).
• Commercial Projects All-electric commercial and mixed-use renovation and new construction projects including affordable housing, wellness centers, retail spaces, and multi-tenant buildings built to high-performance standards. Suited to local businesses, non-profits, and community organizations in northern New Hampshire and Vermont.

Quantifiable outcome

• ACH50 air tightness ratings of 0.41–0.6, significantly exceeding standard building codes and Passive House standards
• +4 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Five partnerships are on record, tiered minor.

• Northern Forest CenterminorStrategic or Co-development PartnerOwner and development partner for the PJ Noyes Building project, a 12,000 sq ft all-electric historic renovation in Lancaster, NH now housing Taproot Marketplace and six apartments. Garland Mill served as the general contractor.
• Alba ArchitectsminorStrategic or Co-development PartnerArchitectural design partner for the PJ Noyes Building commercial renovation project during Covid, working alongside Garland Mill and Bruss Project Management.
• Bruss Project Management (Michael Bruss)minorImplementation/ SI/ Consulting PartnerOwner's Representative for the PJ Noyes Building project, providing project management oversight. Also serves as Owner's Rep for the 23 Ammonoosuc project.
• Apprenticeship NHminorStrategic or Co-development PartnerPartnership with Apprenticeship NH and the US Department of Labor for Garland Mill's registered apprenticeship program. The program involves 6,000 hours (3 years) of paid on-the-job training, with related instruction at NHTI – Concord's Community College and the National Center for Construction Education and Research.
• NHTI – Concord's Community CollegeminorStrategic or Co-development PartnerEducational institution partner providing Related Instruction for Garland Mill's registered apprenticeship program, covering the National Center for Construction Education and Research curriculum and OSHA 10 certification.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• BrightBuilt Home: Maine-based design-build firm producing net zero, panelized high-performance homes. Comparable sustainability focus, net zero specialization, and integrated design-build delivery in the Northern New England market.
• Bensonwood: Walpole, NH-based design-build firm specializing in timber-frame homes and sustainable, high-performance construction. Direct peer to Garland Mill given overlapping New England footprint, timber-frame heritage, and focus on energy-efficient custom homes.
• BPC Green Builders: Connecticut-based custom builder specializing in high-performance, energy-efficient, and net zero homes. Directly comparable niche, custom-residential focus, and sustainability-driven value proposition.
• GO Logic: Maine-based design-build firm focused on Passive House and net zero construction for residential and light commercial projects. Highly comparable to Garland Mill's Passive House, super-insulated, and all-electric delivery model.
• Yankee Barn Homes: New Hampshire-based timber-frame home design-build firm offering post-and-beam custom homes across the Northeast. Comparable timber-frame heritage, custom delivery, and regional Northeast footprint.
• Davis Frame Company: Claremont, NH-based timber frame design and engineering company producing custom timber frame homes and commercial structures. Comparable New Hampshire base, timber frame specialty, and custom residential orientation.

Regional players

• Hammer & Hand: Pacific Northwest design-build firm specializing in Passive House, deep energy retrofits, and high-performance custom homes. Comparable technical depth in Passive House and high-performance construction, though operating on the West Coast.
• New Frameworks: Montana-based natural building design-build firm specializing in high-performance, timber-frame, and natural-materials homes. Comparable building-science and sustainability niche, though serving a Western rather than Northeast geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Customer concentration

• Facebookfacebook.com/GarlandMill
• Instagraminstagram.com/garlandmill
• LinkedInlinkedin.com/company/garland-mill

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

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 Garland Mill