Create the space you need
You don’t need to leave the home you love to gain the space you need.
At Spartan Builders, we specialize in custom home additions that honor your existing architecture while enhancing your lifestyle. Proudly serving Germantown and communities within a 50-mile radius, our team approaches every project with thoughtful planning, precision craftsmanship, and your vision at the center.
We take the time to understand your goals, your budget, and how you truly live—so we can build a space that feels effortlessly aligned with your home and your future.
Call 920.248.7938 to schedule a private consultation.
Focus on what matters most—we’ll take care of the rest.
Elevating Homes with Tailored Additions Throughout Central and Southeast Wisconsin
From Concept to Completion
Spartan Builders is your trusted partner in seamless, high-end home additions.
When you choose our team, you can expect a comprehensive, start-to-finish experience led by seasoned professionals who prioritize precision, planning, and craftsmanship at every step.
Here’s what to expect with our home addition services:
Custom architectural plans and 3D renderings tailored to your home and vision
Full engineering evaluation of your foundation and structure to ensure lasting integrity
Permit management with your local municipality—handled completely by our team
Site preparation, excavation, and landscape coordination
Complete buildout from foundation to finish
Expert mechanical installations (plumbing, HVAC, electrical, and more)
All rough framing and internal structural work
Interior and exterior finishing, curated to your style and specifications
Before we consider your project complete, we’ll walk you through every detail to ensure it meets our standards—and exceeds yours.
Schedule your consultation today and let’s start building something exceptional.