PRK Williams Building Group is a trusted home builder for home additions in Eastern Iowa. We specialize in well-integrated additions and four-season porches that expand your living space without compromising comfort, health, or long-term livability. From concept to completion, we design and build spaces that feel like they’ve always belonged.

When your home no longer fits your lifestyle, an addition can transform how you live—without the hassle of moving, creating additional square footage and increasing your home’s value.

At PRK Williams Building Group we design and build additions that integrate beautifully with your existing home—structurally, architecturally, and functionally.

Your Forever Home

Our focus on forever homes and universal design means that we design additions that adapt with you by planning for:

• Thoughtful layouts and wider pathways
• Easy transitions between spaces
• Comfort, safety, and long-term usability

These details are seamlessly integrated into your beautiful new space.

• Expanded kitchens or living rooms
• Additional bedrooms or guest suites
• Primary suite additions
• Family room or great room expansions
• Four- Season Porches

Healthy Home Technology & Materials

As an industry leader in healthy home technologies and materials, we incorporate proven strategies that support a healthier living environment, including:

• Improved ventilation and air quality solutions such as a whole home 24/7 whole home air purification system
• Moisture management and insulation systems
• Low-VOC and non-toxic building materials