#1 Chicago General Contracting Contractor: Pegasus Construction
Finding the right contractor to build an addition on your Streeterville, Chicago home can be a challenge. It’s important to thoroughly vet and interview your options before deciding who to hire.
To ensure that you find a contractor that meets your needs and budget expectations, download our free 3-Step Guide to Choosing A Remodeling Contractor.
Whether you decide to hire our team at Pegasus Construction or another local remodeler, you can use this helpful guide to be confident knowing you have your bases covered.
A successful home remodel starts with a clear plan. With hundreds of satisfied Streeterville, Chicago customers, our proven 6-Step Design-Build Process ensures a smooth and stress-free remodeling experience.
1 in 3 remodels exceed their budget—but yours doesn’t have to. At Pegasus Construction, we’ve created a budgeting system to eliminate surprise costs, with our projects averaging just a 5% variance from the initial budget to the final price.
Feel confident knowing your home remodel is managed by experts. Each project is assigned a dedicated team, led by an experienced master carpenter, ensuring timely completion. While other companies face delays of weeks or months, our projects average less than a 2-day difference from the original schedule.
Home additions in Streeterville are rare — most residents live in condos where traditional additions are not possible. But for the few single-family or townhome owners in the neighborhood, adding square footage is a significant project that requires navigating Chicago’s permit process, tight lot conditions, and some of the most scrutinized zoning in the city. Pegasus Construction has the experience to get it done right.
Home additions in Streeterville require permits from the City of Chicago Department of Buildings at 121 N. LaSalle Street, Room 905. Urban lot additions often require zoning variance reviews and detailed engineering drawings. We handle every step of the approval process from application through final inspection.
Streeterville lots leave almost no room for error — setbacks are tight, neighboring buildings are close, and the city scrutinizes every detail of an urban addition permit. We design additions that work within these real constraints and build them without disrupting neighbors or violating the conditions of the permit.
When every square foot costs what it does in Streeterville, a well-designed addition is one of the best investments a homeowner can make. We design additions that add meaningful, usable space — not just square footage on paper — so you get maximum value for what you spend.
If you find yourself needing more living space and want to expand your home rather than upsize, a single-level addition is the place to start.
The most cost-effective way to add living space, a single-level addition attaches to the side of the home. They typically require expanding the home’s foundation, and are most often used for expanding kitchens, living rooms, or home offices.
Single-level additions are typically limited by lot size and setback laws. For this reason, these additions are better fit for homes on larger lots.


Want to expand your home without expanding its footprint? Many homeowners don’t realize it’s possible to expand their living space by adding a second story.
Although often more expensive than single-level additions, second-story additions can be a great solution for homeowners who need additional living space but don’t have enough yard space to build out.
Second-story additions tend to be more technically challenging, as they require extensive engineering and planning to ensure that they don’t disrupt the design or aesthetic of the existing structure.
For some homeowners, a basement addition is the best way to expand their living space. This often involves either raising the home or digging out the crawl space.
Homeowners who go this route often use their basement for additional bedrooms, a recreational space, or an Accessory Dwelling Unit (ADU).
Basement additions are among the most expensive methods of adding onto a home. Extensive manual labor, planning, and permitting all contribute to the high cost of basement additions.

At Pegasus Construction our mission is to change the lives of homeowners by helping them expand their homes with custom home additions built just for them. However, we also recognize that not every home addition project is the right fit for our team. Here is how to tell if Pegasus Construction is or isn’t a good fit for your home addition project.
Schedule an advisory call with a Design Consultant
Invite us to your home for an initial evaluation
Align on a budget and meet to discuss the design
As a design-build firm, we work with homeowners to thoroughly plan out their remodel project before moving them to construction. Check out our Process Page to learn more about the design-build experience.
Absolutely. At Pegasus Construction, we’re dedicated to giving you full control over your remodeling budget. One of the key advantages of the design-build process is that you’ll have a clear understanding of the total cost before construction even begins.
Consider the timeline for both the design and construction processes.
It depends primarily on the scope of the project. A small home addition takes about 14 weeks to complete, but your may take more or less time depending on the complexity.
Pegasus Construction is a design-build firm offering Full-Process remodeling services, managing every aspect of both design and construction. While design-build firms are just one of many contractor types, we aim to provide a seamless experience for homeowners.
To help you find a contractor who aligns with your expectations for a home addition, download our 3-Step Guide to Choosing a Remodeling Contractor.
When designed well and kept to a reasonable budget, an addition can be a great investment in the value of your home and the quality of your life while you live there. Market data suggests that home improvement projects can add up to 80% of their cost back to the home’s value upon completion.
Choosing the right contractor for your remodel can be simple. Use our free guide to walk you through 3 easy steps to select the perfect contractor.