What Island Carpentry does

Island Carpentry Inc is a privately-held residential contracting firm headquartered on Georgetown Island, Maine, founded in 2010 and operating across 18 towns in Midcoast and Southern Midcoast Maine. The firm designs and builds custom net-zero, high-performance, and energy-efficient homes, and also performs additions, deep energy retrofits, accessibility/aging-in-place upgrades, and coastal climate-resilient renovations for individual homeowners.

Core construction technology centers on a proprietary wall framing system using 2x8 studs sheathed with 2" foam board and dense-packed cellulose to achieve R-45 insulation (vs. R-22 in traditional construction), paired with a super-insulated roof system reaching R-60 using 2x12 rafters and thermal-break strapping. Projects integrate heat recovery ventilation (HRV), ductless mini-split heat pumps, grid-tied solar arrays, and triple-glazed windows. Third-party HERS ratings have validated performance at index 20 (80% better than baseline). Notable designs include the 1,200 sq ft Eco Cape, a 2,200 sq ft Energy Independent Cape Cod Style Home, and Eco-Village One — an affordable zero-energy subdivision concept in Bath, Maine.

The business model is direct-to-consumer, sales-led, with project-based pricing quoted individually after consultation; no public pricing exists. Customers engage via phone, email, or website contact form, and projects typically span multi-year contract cadences. Marketing is driven primarily by an SEO-optimized content blog, project case studies, and word-of-mouth referral. The firm partners architecturally with BrightBuilt Home (Kaplan Thompson Architects) and 44 North Architects, and engages certified HERS rater Wes Riley for third-party energy verification.

Name

Island Carpentry

Legal name

Island Carpentry Inc

Website

https://island-carpentry.com

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

11–50 employees

Short description

Island Carpentry is a Georgetown, Maine-based residential contractor that designs and builds custom net-zero, high-performance homes, additions, deep energy retrofits, and climate-resilient renovations for homeowners across 18 towns in Midcoast Maine.

Ownership category

akta.pro rank

Product category

Residential Construction Services

NAICS

Residential Building Construction (2361), Finish Carpentry Contractors (238350)

SIC

Prefabricated Wood Bldgs & Components (2452)

akta.pro primary industry

Residential Green / High-Performance Home Construction (Net-Zero, Passive House) (IMAFABAH)

akta.pro secondary industry

Trim, Baseboards, Crown Molding & Finish Carpentry (HSAPAFAD)

Keywords

• Net zero home construction
• Residential contracting services
• Deep energy retrofits
• Custom home building
• Maine coastal construction

Headquarters

HQ city

Georgetown

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales

Revenue model

1. Custom Home Construction: Building new net-zero, high-performance, and custom homes. Projects include single-family residences, additions, and coastal/climate-resilient construction throughout Midcoast Maine.
2. Renovations & Additions: Home additions and renovation services including seamless expansions, upgrades, and transformations that improve comfort, function, and long-term value.
3. Deep Energy Retrofits: Transforming older homes into efficient, comfortable, low-energy structures through comprehensive weatherization and energy efficiency improvements.
4. Accessibility & Aging-in-Place Upgrades: Design solutions improving safety, comfort, and long-term livability for homeowners aging in place.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Island Carpentry is a Georgetown Island-based residential contracting firm that designs and builds net-zero, high-performance, and energy-efficient custom homes, additions, renovations, and deep energy retrofits for homeowners in Midcoast and Southern Midcoast Maine. Projects combine a proprietary super-insulated building envelope, heat recovery ventilation, all-electric mini-split heat pumps, grid-tied solar, and triple-glazed windows to produce homes that match or exceed HERS Index performance standards and withstand Maine's coastal climate.

Product overview

Island Carpentry is a residential contracting firm offering a portfolio of high-performance, net-zero energy home building services. Core offerings include Net-Zero & High-Performance Homes, Custom Homes, Additions & Renovations, Deep Energy Retrofits, Coastal & Climate-Resilient Construction, and Accessibility & Aging-in-Place Upgrades. The company also partners with Bright Built Homes (designed by Kaplan Thompson Architects) for modular net-zero home construction. Notable home designs include the Eco Cape (1200 sq ft economical model), Energy Independent Cape Cod Style Home (2200 sq ft with solar), and Eco-Village One (affordable zero-energy subdivision in Bath, Maine).

Differentiator

Problem solved

Functional benefit

Brands

• BrightBuilt Homes Partnership: Partnership with BrightBuilt Home (Kaplan Thompson Architects) for modular zero energy home designs
• Eco Cape
• Eco-Village One

Products and services

• Net-Zero & High-Performance Homes Energy-efficient residential construction designed for long-term comfort, durability, and low operating costs, producing as much energy as the home consumes over the year.
• Custom Homes Thoughtfully designed custom homes built to match the homeowner's lifestyle, site, and Maine's climate requirements, integrating the firm's high-performance envelope and mechanical systems.
• Additions & Renovations Seamless home expansions and upgrades that improve comfort, function, and long-term value of existing homes in Midcoast Maine.
• Deep Energy Retrofits Comprehensive weatherization and energy-efficiency transformation of older homes through air sealing, insulation upgrades, and heat pump installation to deliver efficient, comfortable, low-energy structures.
• Coastal & Climate-Resilient Construction Building and renovation work that withstands Maine's coastal weather, salt air, temperature swings, and seasonal extremes, using materials and methods selected for coastal durability.
• Accessibility & Aging-in-Place Upgrades Design solutions that improve safety, comfort, and long-term livability for homeowners choosing to age in place, with modifications tailored to accessibility and mobility needs.
• BrightBuilt Homes (partner brand offering) Modular net-zero energy homes designed by Kaplan Thompson Architects and built by Island Carpentry, offered as a partnership-based construction offering for Maine homeowners.
• Eco Cape Economical 1,200 sq ft super-insulated home design, ready for a solar electric system and heated and cooled by a mini-split air source heat pump, built by Island Carpentry.
• Energy Independent Cape Cod Style Home 2,200 sq ft, 3-bedroom, 3.5-bath zero-energy Cape Cod-style home with an attached two-car garage, producing most of its own energy via solar panels, built at the Kelsey Brook neighborhood in Freeport, Maine.
• Eco-Village One Maine's first affordable zero-energy housing subdivision in Bath, featuring super-insulated, passive solar homes with renewable energy systems, developed and built by Island Carpentry.

Quantifiable outcome

• HERS Index of 20 achieved - 80% better than baseline new construction
• +5 more outcomes

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

Feature6 records

Partnerships

Five partnerships are on record, tiered core and minor.

• BrightBuilt HomecoreStrategic or Co-development PartnerPartnership for net zero energy home projects. BrightBuilt Home was founded by award-winning Kaplan Thompson Architects of Portland, Maine with the mission of providing state of the art, healthy, low-energy, affordable homes. Island Carpentry serves as project builder for BrightBuilt modular home designs. Collaboration on design, modular construction, and on-site building for zero energy homes.
• 44 North ArchitectsminorStrategic or Co-development PartnerArchitectural firm led by Tor Glendinning. Designed high-performance ranch home project in Edgecomb, Maine. Collaborative relationship for custom home designs.
• Kaplan Thompson ArchitectscoreTechnology or IntegrationAward-winning architecture firm from Portland, Maine that founded BrightBuilt Home. Specializes in sustainable design and high-performance homes. Provides design expertise for zero energy home projects.
• From House to HomeminorGTM or Marketing PartnerPublished article on Cranberry Point renovation project in Phippsburg, Maine.
• Zero Energy ProjectminorGTM or Marketing PartnerNational resource organization connecting homeowners with resources and information about zero energy homes and buildings. Island Carpentry references the organization as a valuable resource for prospective homeowners considering zero energy construction.

Scale indicators8 records

Recent moves6 records

Expansion highlights4 records

Emerging players

• Plant Prefab: California-based sustainable prefab home manufacturer focused on net-zero-ready custom and multi-family projects. Adjacent delivery model (prefab + custom) with explicit sustainability positioning.
• Dvele: California-based tech-enabled prefab home builder producing net-zero, smart-home-equipped residences. Competes for the same sustainability-minded premium custom buyer from a manufacturing-led angle.
• Connect Homes: Los Angeles-based modular prefab home company using precision-built steel and panelized systems. Different geography but overlapping product story (modern, sustainable, factory-built housing) for tech-forward buyers.
• Cover: Bay Area-based modular backyard and custom home company focused on sustainable, factory-built units. Overlaps on the prefab + sustainability thesis even though their ADU-first focus differs.

Others

• BrightBuilt Home: Portland, ME-based sister company of Kaplan Thompson Architects that designs modular net-zero homes. Island Carpentry is the on-site construction partner for BrightBuilt projects, so the two are linked ecosystem collaborators rather than direct sales competitors.
• Kaplan Thompson Architects: Portland, ME-based sustainable architecture firm and parent of BrightBuilt Home. Island Carpentry's core design partner for zero-energy projects, providing upstream design authority rather than competing for the same construction contract.
• 44 North Architects: Edgecomb, ME-based architecture firm (Tor Glendinning) that designed Island Carpentry's Edgecomb high-performance ranch project. Architectural ecosystem partner rather than a competing builder.

Direct peers

• Bensonwood: Walpole, NH-based high-performance custom home builder using timber frame and prefab panelized construction with a similar net-zero/Passive House focus across New England. Comparable model: high-end, energy-focused, semi-custom delivery.
• GO Home: Portsmouth, RI-based Passivhaus/zero-energy custom home builder serving coastal New England. Closest head-to-head comparable on climate, methodology (super-insulated envelope, HRV, solar) and high-end custom buyer profile.
• Ecocor: Searsmont, ME-based builder of prefab, high-performance Passive House and net-zero homes serving the Northeast. Comparable regional delivery model (prefab + on-site finish) targeting energy-focused homeowners.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/island-carpentry

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Island Carpentry