Elevate Your Home with Thoughtfully Designed Additions & Conversions

At Tortoise Construction LLC, we specialize in high-quality home additions and conversions that look and feel like a natural part of your home. Whether you're adding a second story, expanding for a growing family, building a custom in-law suite, or converting a garage into a functional ADU or guest space, our team brings expert craftsmanship, strong communication, and long-term value to every project.

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From initial design and permitting to final walkthrough, we make the process clear, smooth, and tailored to your needs. We serve homeowners across Portland, Lake Oswego, Happy Valley, and surrounding areas with full-service project management and attention to detail so you never feel left in the dark.