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Construction and Home Improvement

New Hampshire

Same-Day Estimates 

40+ Years of Design & Build Services

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Reliable Construction From Skilled Craftsmen

CMGC Building Corporation provides quality construction services throughout New Hampshire and the Lakes Region. Since 2004, our family-owned business has built on 40 years of experience, blending traditional craftsmanship with modern building techniques to create lasting homes and spaces.


Our master carpenters pay close attention to every detail, making sure each project meets our standards for quality and durability.

CMGC Building Corporation distinguishes itself through consistent adherence to timelines, full-service capabilities, and unique certifications. As one of only three companies in the region certified for historical renovations, we bring specialized knowledge to preservation projects while adhering to current building standards.


We build our customer relationships on performance, integrity, safety, and teamwork. From securing permits to working with insurance companies, we manage all construction complexities so you can focus on enjoying your new space. Contact us today to schedule your next project!

Why Choose Us

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Fast, Dependable Services

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Same-Day Estimates for Most Projects

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Historical Renovation Works Certified

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Custom Design Services

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40+ Years of Experience

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Master Carpenters

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Licensed and Fully Insured

CMGC Building Corporation

New Home Builds

CMGC Building Corporation builds custom homes that match your vision and requirements. Our design and construction services support you through each construction phase, from initial planning to final completion. Every new home includes our 5-year warranty, giving you confidence in your investment.

Bathroom Remodeling Services

Update your bathroom into a practical and attractive space with our complete remodeling services. Our team oversees everything from choosing fixtures to final installation, delivering waterproof, beautiful results. We offer same-day estimates for most bathroom projects to help you plan effectively.

Deck Services

Add outdoor living space with a custom deck from CMGC Building Corporation. Our skilled carpenters build sturdy, beautiful decks designed for New Hampshire's changing seasons. We handle all permit requirements and ensure your deck meets local building codes.

Home Addition Services

Enhance your home's space and value with our thoughtful addition services. Our team carefully blends new areas with your existing home, preserving architectural harmony. All home additions come with our 5-year warranty and benefit from our skill in matching materials and designs.

Kitchen Remodeling Services

Update your kitchen with our full remodeling services that balance function and style. Our team coordinates everything from cabinets to countertops for a cohesive result. We stay informed about current kitchen design trends and materials to provide fresh solutions.

Siding Installation

Safeguard your home with professional siding that enhances both appearance and energy efficiency. As GAF certified contractors, we install quality materials and offer custom design services tailored to your style and needs. Our siding services include proper insulation and moisture barriers for complete home protection.

CMGC Building Corporation

10% Off Exterior Upgrades

Transform your home's appearance and energy efficiency with 10% savings on premium siding, windows, and doors from New Hampshire's trusted builders.

Contact us today to schedule your free consultation!

Not valid with any other offers or promotions. Restrictions apply.

Must mention this coupon at the time of scheduling.

CMGC Building Corporation

10% Off Exterior Upgrades

Transform your home's appearance and energy efficiency with 10% savings on premium siding, windows, and doors from New Hampshire's trusted builders.

Contact us today to schedule your free consultation!

Not valid with any other offers or promotions. Restrictions apply.

Must mention this coupon at the time of scheduling.

CMGC Building Corporation
SAVE ON ROOF & DECK

Protect your investment and enhance your outdoor living space with 10% off professional siding, deck, roof, window, and door upgrades.

Contact our experts now!

Not valid with any other offers or promotions. Restrictions apply.

Must mention this coupon at the time of scheduling.

Recent Projects

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Here's what our satisfied customers are saying...

At CMGC Building Corporation, we take pride in providing exceptional construction and remodeling services to our customers. We would be grateful if you could share your thoughts about our family-owned business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of CMGC Building Corporation and let others know what you think.

Frequently Asked Questions

  • From a customer perspective, what is CMGC Building Corporation and what do you do for homeowners?

    We are a residential construction and remodeling team focused on helping homeowners improve and reimagine their living spaces. As CMGC Building Corporation, we bring experience across a wide range of home projects, from small upgrades to larger renovations. Our work is centered on practical solutions that enhance comfort, function, and long-term value. We often support clients planning home improvement in Londonderry, NH, delivering tailored approaches that reflect each property's needs. Our process emphasizes collaboration, clear expectations, and consistent communication so homeowners feel informed throughout every stage of their project. We take pride in building spaces that align with both lifestyle goals and structural integrity. We place strong emphasis on understanding each homeowner's priorities so we can tailor solutions that align with both immediate needs and long-term improvements.

  • What types of home improvement services can we expect you to handle?

    We provide a broad range of residential services designed to support both interior and exterior upgrades. This includes kitchen and bathroom remodeling, home additions, basement finishing, and general carpentry improvements. We also take on structural modifications and custom renovation work depending on the goals of each homeowner. Many of our projects involve home improvement in Londonderry, NH, where we adapt designs and construction plans to fit existing homes while improving usability and appearance. Our approach is flexible so we can handle both focused renovations and larger multi-phase projects with the same level of attention and care. We remain committed to maintaining consistent craftsmanship across every project while adapting to the unique conditions of each home we work on.

  • How do you approach estimates and project planning before starting a job?

    We begin every project with a consultation to understand the homeowner's vision, budget considerations, and overall scope of work. From there, we evaluate the site conditions and develop a detailed plan that outlines materials, labor, and timelines. This stage helps us ensure accuracy and alignment before construction begins. For many clients seeking home improvement in Londonderry, NH, this process provides clarity and confidence before committing to a project. Our estimates are designed to be transparent so homeowners understand how each part of the project contributes to the overall cost and schedule. We focus on making the planning phase straightforward so homeowners feel confident moving into construction without uncertainty.

  • Are you properly licensed and insured for residential construction work?

    We maintain the appropriate licensing and insurance required for residential construction and remodeling work in New Hampshire. This allows us to operate in compliance with local regulations while protecting both our team and homeowners throughout each project. We take safety and accountability seriously on every job site, ensuring that work is completed responsibly and in line with industry standards. Our commitment to professionalism helps ensure a smooth construction experience from start to finish.

  • How do you manage project timelines and keep work on schedule?

    We establish project timelines during the planning phase based on scope, material availability, and seasonal considerations. Once work begins, we coordinate each stage carefully to maintain steady progress and minimize delays. Communication plays an important role in keeping homeowners updated as the project develops. Many of our clients focused on home improvement in Londonderry, NH appreciate having a structured schedule that balances efficiency with quality workmanship. We adjust as needed when unexpected conditions arise while maintaining transparency throughout the process.

  • Do you handle building permits and inspections for renovation projects?

    We take care of the permitting process when it is required for a project, including coordination with local building departments and submission of necessary documentation. This ensures that all work meets applicable codes and regulations before and during construction. Handling permits on behalf of homeowners helps streamline the renovation process and reduces administrative burden. For projects involving home improvement in Londonderry, NH, this support allows homeowners to focus on design and outcomes while we manage compliance requirements behind the scenes.

  • What kind of support do you offer after a project is completed?

    We stand behind the quality of our work and provide post-project support to address any concerns that may arise after completion. Our goal is to ensure that finished results continue to meet expectations over time. If adjustments or follow-up work are needed, we remain available to assist and resolve issues efficiently. Homeowners investing in home improvement in Londonderry, NH often value knowing that we remain accessible after construction ends. Our commitment extends beyond project completion, reflecting our dedication to long-term client satisfaction.