Byggmeister

What Byggmeister does

Byggmeister is a privately-held, worker-owned design/build firm founded in 1983 by Paul Eldrenkamp and headquartered in Waltham, Massachusetts, serving homeowners across the Boston metropolitan area (Cambridge, Somerville, Belmont, Lexington, Newton, Brookline, Jamaica Plain, Arlington, Waltham, Roslindale, and surrounding communities). The company specializes in the renovation of older and historic homes, integrating planning, architectural design, interior design, and construction under a single accountable team, with a particular emphasis on energy efficiency, deep energy retrofits, full electrification, and net-zero energy performance.

Service delivery follows a phased design-build model (Courtship, Planning and Design, Construction, and Post-Construction Monitoring) anchored by lead carpenters, project architects, interior designers, an estimator, and a business manager. Technical capabilities include energy modeling, blower door-guided air sealing augmented by AeroBarrier (achieving envelopes below 2-3 ACH50), infrared inspection, dense-pack cellulose and spray foam insulation, heat pump system design, solar PV integration, and post-occupancy energy verification using Sitesage eMonitor circuit-level metering. Documented project outcomes include 75-80% annual energy reductions and net-zero production-to-consumption ratios on retrofit projects.

The firm generates revenue through hourly-billed design services followed by fixed-price construction contracts, with project timelines typically spanning 3-6 months per engagement (bathrooms ~3 months, kitchens ~4 months, basements 4-12 weeks, finished attics 3-5 months). Customers are acquired directly via website contact forms, content marketing, referrals, and partnerships with programs such as Mass Save. In 2021, the founder sold the company to its employees, creating a worker-owned cooperative that commits 5-10% of annual net profits to charitable causes.

Name

Byggmeister

Legal name

Byggmeister

Website

https://byggmeister.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

11–50 employees

Short description

Byggmeister is a worker-owned design/build firm in Waltham, Massachusetts, specializing in energy-efficient renovations, deep retrofits, and net-zero electrification of older homes for homeowners across the Boston metropolitan area.

Ownership category

akta.pro rank

Product category

Residential Home Renovation and Design-Build Services

NAICS

Residential Remodelers (236118), Interior Design Services (54141)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Kitchen Permitting, Design & Project Management (HSAPAAAK)

Keywords

• Residential renovation services
• Design build firm
• Home energy retrofits
• Historic home remodeling
• Net zero energy homes

Headquarters

HQ city

Newton

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, Technology or R&D

Revenue model

1. Design Services: Planning and design phase billed hourly, including schematic design, plan development, construction drawings, and specifications.
2. Construction Services: Fixed price construction contracts following the design phase. The company provides a detailed construction budget and schedule before signing the construction agreement.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Byggmeister is a design/build firm that renovates and modernizes older homes in the Boston/metro Massachusetts area, delivering integrated services from initial design through post-construction warranty. The company specializes in whole-house renovations, kitchen and bath remodeling, interior space transformations, energy retrofits, and net-zero energy retrofits for historic and pre-1970s homes, emphasizing sustainability, electrification, and preservation of architectural character.

Product overview

Byggmeister is a design-build firm offering integrated renovation services for older homes. The core offering consists of Whole House Renovations, Kitchen & Bath Remodeling, Interior Space Transformations, and Energy Retrofit Services, all delivered through a unified Design-Build Process with phases spanning Courtship, Planning and Design, Construction, and Post-Construction Monitoring. Specialized services include Net Zero Energy Home Retrofits, High-Performance Home Upgrades, Historic Home Preservation, and Aging in Place Modifications. Post-Construction Monitoring & Warranty service provides ongoing follow-up to ensure long-term client satisfaction and documented energy performance.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Air leakage reduction of 80% achieved through combined blower door-guided air sealing and AeroBarrier application
• +3 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Holland and Foley ArchitecturecoreStrategic or Co-development PartnerArchitectural partnership on deep energy retrofit projects. David Foley of Holland and Foley Architecture served as project architect on net-zero energy retrofit projects, collaborating on design solutions and historic commission approvals.
• AcentechcoreImplementation/ SI/ Consulting PartnerAcoustical engineering consultant engaged for projects requiring sound isolation and quality design. Worked on music room design and traffic noise remediation projects, providing expert guidance on sound control in residential settings.
• Massachusetts Clean Energy Center (Mass CEC)minorStrategic or Co-development PartnerState agency internship program connecting students with clean energy sector employers. Byggmeister has hosted multiple interns through this program for clean energy research and energy tracking projects.
• Northeast Sustainable Energy Association (NESEA)coreStrategic or Co-development PartnerRegional sustainable energy association facilitating peer networks, conferences, and professional development. Byggmeister participates in Bottom Lines peer-review program and Building Energy conference presentations.
• Mass SavecoreStrategic or Co-development PartnerMassachusetts state energy efficiency program providing assessments and incentives. Byggmeister coordinates with Mass Save on insulation, air sealing, and energy assessment projects for qualifying homeowners.
• PlacetailorminorStrategic or Co-development PartnerInnovative design/build firm in Massachusetts. Hosted architecture student intern through Mass CEC program.
• Northeast Energy Efficiency Partnership (NEEP)minorStrategic or Co-development PartnerRegional efficiency consulting organization. Hosted research intern through Mass CEC program working in Evaluation, Measurement, and Verification group.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Market position

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/byggmeister
• Instagraminstagram.com/byggmeister
• LinkedInlinkedin.com/company/byggmeister-inc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 Byggmeister