Luxury Home Addition Contractors in Denver & Boulder

Denver's trusted home addition contractors. Design build home addition contractors that understand budget, quality control, and the design-build process. Factor Design Build will streamline your home addition project by offering a comprehensive in-house design build process.

Our home additions are thoughtfully designed by a staff of experienced architects and interior designers. Final home addition designs are passed along to our team of seasoned craftsman that take pride in all aspects of their work.

Craftsman Bungalow Addition

Let's transform your Denver or Boulder craftsman bungalow into the space you've always wanted! The Factor Design Build team has 30+ years of experience with second story additions and bump outs on historic craftsman bungalows.

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Pop Top Home Addition

We are the local pop top home addition experts in the Denver & Boulder, CO area! Work with our design build experts to significantly increase your home's square footage and implement the stylish upgrades you've always hoped for!

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Second Story Addition

Our team of designers and craftsman have overseen hundreds of second story home addition projects in the Denver Metro Area. Trust Factor Design Build to maximize your home's footprint and enhance it's style with a second story addition.

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Contact us today to schedule an initial consultation for you home addition project.

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Historic Home Additions

Factor Design Build has successfully overseen dozens home addition projects on historic homes in the Denver Metro Area. Our team takes pride in creating home additions that increase your home's square footage and functionality, while maintaining it's historic character.

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Denver Home Addition Contractors

Denver Home Addition Contractors

We apply our decades of experience to ensure your home addition is structurally sound and aesthetically blends in with the character of your neighborhood. Make the most of your home's footprint with the guidance of Factor Design Build.

Home Addition Insights & Articles

Second Story vs. Ground Level Addition: What’s Best for Historic Homes? Denver & Boulder, CO Historic Home Additions

Remodeling a historic home can be an exciting challenge for homeowners considering a ground level addition or considering whether to … Read More

Adding a Second Story to a Craftsman Bungalow: 6 Things to Know About a Bungalow Second Story Addition

There’s something special about a craftsman bungalow and about building a second story on a bungalow. Maybe it’s the intricate … Read More

Adding A Second Story Pop Top Addition

Adding a Second Story Home Addition or Pop Top Addition Building upward with a custom design for a second story … Read More

Home Addition Design Tips: Planning a Successful Home Addition and Remodel

Making the decision to remodel or add on to your home can be both exciting and nerve-wracking. But never fear, … Read More

Home Addition FAQs

Factor reviews some of the most common questions we discuss with clients during an initial home addition consultation.

  • What is the best home addition method for my home?

    There are a variety of addition methods that can help accomplish your home renovation goals.

    Bump Out – Adds square footage by adding a room or additional space on the ground level of your home. Bump outs are a great way to renovate your home if you have the appropriate amount of property to expand your footprint. Many of the historic neighborhoods in Denver and Boulder have relatively narrow land parcels which can complicate this process.

    Second Story/Pop Top – Adding a second story or “pop top” has become a very popular renovation method in Colorado. Smaller land parcels in popular Denver neighborhoods have been driving homeowners to build up instead of out. Many of these renovations tend to take place on historic homes, so it is important that your foundation can bear the load of a second story. The design team at Factor will oversee the necessary assessments of your foundation to ensure a pop top is appropriate for your home.

    ADU (Accessory Dwelling Unit) – An ADU or “mother-in-law suite” is a fantastic way to maximize your property’s living space. Adding a living area or office detached from your home can help you achieve your goals without significant intrusion during the construction process. Building these types of additions on top of existing detached garages has been increasingly common in the Denver Metro Area. Laws and limitations on ADUs vary so it is crucial to check with your local municipality on zoning laws.

    The team at Factor will work with you to designate your renovation goals and help you decide which home addition is best for your family.

  • How much will a home addition add to my home's value?

    Even if your family plans to enjoy the home addition for years to come, investing in an addition remodel can add significant value to your home when it is time to sell. Exact return on investment on a home addition project is difficult to estimate precisely due to the fluctuating nature of the real estate market. However, adding square footage and making modern upgrades to your home will undeniably add value to your home’s listing price. Although home addition projects can come with a big price tag, you can address your current living needs without having to relocate and recoup a percentage of the expense when it is time to sell.


  • What are my options for financing a home addition project?

    There are several routes to go when financing your home addition project.

    Home Equity Loan – A home equity loan or “second mortgage” utilizes the equity in your home as collateral and therefore can have lower interest rates than other financing options.

    Personal Loan – A personal loan is a great option if you maintain a high credit score. Many banks and lenders have specialized personal loan products that are designed for home improvements.

    Cash Out Refinance – Cash out refinance essentially replaces your current mortgage with a higher loan amount and pays you out the difference immediately.

Home Addition Testimonials

Factor Design Build did a great job adding on to our nearly 90 year old home. The new spaces look like they have always been there… and wow, they are beautiful!

- Beth – Home Addition

My wife and I are very pleased with Factor’s work. The job was handled very professionally from start to finish. The quality of the workmanship, attention to detail and customer service (hand holding) was all first rate. I would definitely recommend Factor to anyone considering a substantial remodel project.

- Patten Pettway – Home Remodel

Wonderful experience with Factor Design Build on the complete interior remodel of our home. The project included bathrooms, complete kitchen overhaul, flooring, refinishing walls and lofted ceilings, closet reconfiguration, electrical work and custom built-ins. Couldn’t be more pleased with the finished product and thoroughly enjoyed working with the Factor team. They were on top of it throughout the project and very communicative. Project was complete on the projected deadline. White glove service that was a great fit for our family.

- Jana Ellis – Home Remodel


Ready to invest in your home and yourself? Let’s discuss your next luxury design-build project.



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