GMH Construction’s expert contractors and design team can help you build the sunroom, 3-seasons room, or home addition you’ve always dreamed of. If you’re looking to add onto your home in the Brookfield, Pewaukee, Sussex, Delafield, or the Waukesha area, our contractors are here to help. As a family-owned organization, we’ll treat you like one of our own.

3 Benefits of Home Additions in Wisconsin
Maybe your growing household needs more space to stretch its legs. Maybe you’d like a new office to work from home or a peaceful patio enclosure to enjoy your evenings in. Whatever the reason, adding on to your house is an investment that pays off now, and down the line. New home additions are beneficial in many ways, including:
- Increased square footage
- Improved curb appeal
- Value added to your property
How Much does a Home Addition Cost?
The price of a home addition depends on the square footage, building materials, and design details of the project. At GMH Construction, all sunrooms, 3-season rooms, and home addition projects have fixed pricing. Meaning, once we determine the details of the project and give the official quote, the price will not increase. No surprises, just results.

Home Addition Contractors that Finance
We know home addition projects aren’t cheap. Our Finance by Cambria program means your Southeast Wisconsin home addition won’t break the bank. We offer 2 affordable home addition finance options for Wisconsin homeowners:
- 12-month “Same as Cash” payment – zero payments and no interest for a full year
- 5-year loan with a 7.99% APR
Your home addition project doesn’t have to wait. Contact our team to learn more about our financing options.
Our Home Remodeling Process
We’re here to meet your needs, and our simple process checks off all the boxes:
- Schedule a free phone consultation to determine if we’re a good fit
- We’ll visit your home and establish a plan that fits your budget
- We’ll work with you to develop the design of your new space
- Select your finishes and building materials
- Build!
Throughout the building process all our customers can stay up-to-date in real-time with our Co-Construct smartphone application. Access your project’s information and timeline at the swipe of a finger.

Contact Us for a Free Home Addition Consultation
The initial consultation with GMH Construction is on us. We don’t charge our Southeast Wisconsin customers until they’re ready to move forward.

Pewaukee, WI 53186
Open Monday – Friday
Office: 262-696-8131