Home Additions
Home additions are one of the best ways to expand your living space while maximizing the value of your existing home. At Pacific Home Source, we design thoughtful, buildable additions that integrate seamlessly with your current structure, helping you move confidently from concept through permitting.
Feasibility & Existing Home Evaluation
We evaluate your existing home and property to determine what type of addition is feasible, reviewing structure, layout, setbacks, and site constraints. A critical part of this process is understanding your home’s existing structure and foundation, ensuring the addition integrates properly and avoids costly issues down the line.
With experience working alongside structural engineers, our team brings a strong understanding of how homes are built—helping identify efficient solutions and avoid unnecessary construction costs. Through a series of no-cost initial meetings, we align on your goals, budget, and overall approach—ensuring we’re a good fit and dialing in the scope of work before providing a formal estimate.
If your project moves forward, we can schedule a site visit to capture your home using LiDAR scanning technology. This allows us to create an accurate as-built model and 3D walkthrough (within approximately 1/4” accuracy), giving us and your builder and engineer, a reliable foundation to design from
Layout & Addition Design Development
We develop floor plans that integrate seamlessly with your existing home, carefully considering flow, structure, and how the new space ties into the current layout. We collaborate closely with you to refine the design, balancing aesthetics, budget, and construction efficiency.
Preliminary plans are typically delivered within 4 weeks, giving you a clear vision of your project early in the process.
Permit Ready Plans & Project Support
We work closely with you to finalize the design through two in-person design review meetings, along with ongoing communication, ensuring every detail is aligned with your vision while confirming the design is practical and buildable.
Once approved, we develop a complete, permit-ready set of plans that includes foundation, floor framing, and roof framing layouts, giving your builder and engineer a clear path forward.
All of our plans include a 3D walkthrough, helping you visualize the design and understand how the space will feel before construction begins. We also provide CAD files, ensuring all professionals involved are working from the same information, helping avoid delays, miscommunication, and unnecessary costs. Optional renderings are available for clients looking for a more detailed visual representation.
We can also connect you with trusted professionals, including structural engineers and builders, and support you through the permitting process. This includes responding to review comments, covered within our flat fee, to help keep your project moving forward efficiently.
Frequently Asked Questions
How long does it take to design an addition?
Most home addition projects reach preliminary plans within about 4 weeks, depending on complexity and existing conditions. Preliminary plans are the first set of drawings developed after we’ve aligned on scope of work and completed the project kickoff meeting. Final timelines vary based on revisions and permitting.
How much does a home addition design cost?
Costs vary based on size and complexity, but most projects are priced using a flat fee based on square footage, providing clear expectations upfront.
Will the addition match my existing home?
Yes! We design additions to integrate seamlessly with your existing structure, including layout, rooflines, and overall flow, so it feels like a natural extension of your home.
This is especially important to us, as rooflines can be one of the most complex parts of an addition—both in design and function. In the Pacific Northwest, proper roof design is critical, as water management plays a major role in protecting your home. We carefully consider drainage, tie-ins, and long-term durability to help avoid costly issues down the line.
Why is understanding the existing structure so important?
A successful addition depends on how it connects to your home’s foundation and structure. We evaluate this early to ensure the design is safe, efficient, and avoids costly construction issues.
Do I need structural engineering for a home addition?
In most cases, yes. We coordinate with trusted structural engineers and design with structural considerations in mind from the start to streamline the process.
Will you help with permitting and construction?
Yes! We support you through the permitting process, including responding to review comments (included in our flat fee), and can connect you with builders and engineers we have long standing relationships with to move your project forward.
Still have questions?
Schedule a free consultation and we’ll walk through your project, feasibility, and next steps.