As a Monterey remodeling contractor with more than 30 years of hands-on experience, Under Construction Co. delivers high-quality additions, kitchen remodels, bathroom upgrades, ADUs, and full-home renovations across Monterey, Pacific Grove, Carmel, and the surrounding Peninsula.
CA LIC # 782161
Bill began working in construction at age 15, became a foreman by 21, and has since built a reputation for skilled, dependable residential remodeling across Monterey County.
No need for separate architects or designers — Bill drafts plans, handles permits, and walks homeowners through every detail of the design process.
We focus on the Monterey Peninsula, delivering quality craftsmanship, clear communication, and long-standing relationships with clients who continue calling us back.
Under Construction Co. specializes in residential remodels and room additions throughout Monterey, Pacific Grove, Carmel, Pebble Beach, Seaside, Marina, and Salinas. Most projects begin as additions and naturally expand into kitchens, bathrooms, and whole-home improvements — the “while you’re here” work we’re known for. Our approach is straightforward: honest guidance, detailed planning, dependable crews, and craftsmanship that stands the test of time.
We focus exclusively on residential remodeling — not large custom home builds — allowing us to specialize in the details that make existing homes more functional, beautiful, and valuable. Whether you’re expanding your living space or updating multiple rooms, we tailor each project to your home’s architecture and your lifestyle.
Here are a few examples of completed remodels and additions across the Monterey Peninsula. We’re continuing to add new photos as we document recent work.
Bill Westphal built his career the old-fashioned way — starting in the field as a teenager, learning every trade hands-on, and earning his contractor’s license only after 15 years of real-world experience. Today, his approach remains rooted in honesty, craftsmanship, and building long-term relationships. Many of our clients call us back year after year as their homes evolve.
Clear, straightforward proposals with no hidden fees — giving you confidence in the scope, cost, and timeline of your project from the start.
Every project is managed with strict safety standards and a clean, organized worksite to protect your home and everyone involved.
We use reliable materials and proven construction practices to ensure long-lasting results that hold up to daily use and coastal conditions.
From drafting to final finishes, we focus on craftsmanship, precision, and the small details that make your remodel feel complete.
Choose a Monterey Remodeling Contractor You Can Trust
Most of our work comes from referrals — a reflection of the trust homeowners place in our workmanship and our team.
