innovative Building Solutions

Building a more
sustainable tomorrow.

innovative Building Solutions

Designed for comfort. Built for efficiency.

innovative Building Solutions

Craftsmanship that endures.

innovative Building Solutions

Healthier spaces. Built for better living.

Custom Home Builder and General Contractor in Maine

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Energy-Efficient Design

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Custom Solutions

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Expert Craftsmanship

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Integrity & Trust

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Sustainable Materials

about csm custom builders of maine

Custom Homes, Renovations, and High-Performance Building in Maine

CSM Custom Builders designs and builds custom homes across Maine, while also managing renovations, additions, and complex residential construction projects. Our work focuses on durability, efficiency, and craftsmanship suited to the demands of the local climate.

  • Custom Home Construction
  • General Contracting
  • Renovations and Additions
  • Energy-Efficient and Net Zero Homes
  • Sustainable Building Practices

General Contractor for Complex Residential Projects

CSM Custom Builders manages residential construction projects from early planning through completion. As a general contractor, we coordinate trades, schedules, materials, and site conditions to keep projects moving and under control.
We are brought in for new construction, large-scale renovations, and structural additions where experienced oversight makes the difference between delays and a well-executed build.

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Custom Home Building
treatments & services

Custom Home Building

  • 01    Tailored designs to suit your needs and aesthetic.
  • 02    Seamless coordination with architects and designers.
  • 03    High-quality materials and precision construction.
  • 04    Turnkey management from foundation to finish.
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Architectural Design
treatments & services

Architectural Design

  • 01    Full 2D plan sets and 3D Modeling
  • 02    In House Engineering
  • 03    Custom Design
  • 04    Pre-built Plans
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Energy-Efficient & Net-Zero Design
treatments & services

Energy-Efficient Design

  • 01    Advanced insulation and airtight framing.
  • 02    Passive solar window placement for natural light and warmth.
  • 03    Renewable materials and low-VOC finishes.
  • 04    Optional net-zero packages for complete energy independence.
  • 05    Smart home technology for optimized energy use and comfort.
  • 06    Durable, energy-efficient ICF foundations for lasting strength.
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Timber & Modular Construction
treatments & services

Timber & Modular

  • 01    Custom heavy timber and post-and-beam designs.
  • 02    Superior durability with timeless appeal.
  • 03    Precision modular fabrication for reduced waste.
  • 04    Ideal for remote sites.
  • 05    Sustainable sourcing of lumber and structural materials.
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Renovations
treatments & services

Renovations

  • 01    Whole-home remodels and modern upgrades.
  • 02    Structural additions and extensions.
  • 03    Energy efficiency and layout optimization.
  • 04    Attention to detail that enhances your home’s value.
  • 05    Preservation of original craftsmanship and design integrity.
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Our Process & Commitment
treatments & services

Our Process & Commitment

  • 01    Clear communication at every project stage.
  • 02    Dedicated project management team.
  • 03    Honest budgeting and scheduling.
  • 04    A reputation built on trust and craftsmanship.
  • 05    Ongoing client support long after project completion.
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A deeper look.
Materials
House Example

Energy-Efficient Window

Optimized for passive solar gain — warmth in winter, less glare in summer.

Wood Entry Columns

Handcrafted from sustainably sourced timber, sealed for longevity and natural warmth.

Stone Foundation Veneer

Locally sourced stone, precision-laid for enduring strength and timeless style.

Cedar Siding Cladding

Sustainably sourced cedar with natural insulation and timeless warmth.

Renovations and Home Additions That Fit the Existing Structure

CSM Custom Builders handles major renovations and additions for homeowners who want to improve layout, increase space, or upgrade performance. These projects require careful integration with the existing structure, especially in older Maine homes.
We focus on clean transitions between old and new construction, ensuring the finished result feels cohesive rather than added on.

Energy-Efficient and Net Zero Home Construction

Our work emphasizes building performance. We construct homes that reduce energy demand, improve comfort, and stand up to Maine’s seasonal extremes.
This includes:

  • High-performance insulation and air sealing
  • Thoughtful building envelope design
  • Efficient heating and cooling systems
  • Solar-ready and net zero capable construction
  • Material selection based on durability and environmental impact
Jeffrey Despres
GUIDED BY PURPOSE. BUILT WITH PASSION.

CSM Vision

Our mission is to build exceptional homes through quality, integrity, and collaboration. Each project is approached with craftsmanship and care, ensuring a seamless experience from concept to completion. We strive to create inspiring spaces that enrich our clients’ lives and strengthen the communities we serve—proving that the journey enhances the destination.

Quality | Trust | Excellence | Inspiration

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what our clients think

From Vision to Reality

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