Expand Your Horizons. Custom Home Additions, Extensions, and ADUs in Denver & Boulder
Need more space but love your current neighborhood? K&D Development specializes in seamless home additions that blend perfectly with your existing structure. From extra bedrooms and sunrooms to second-story pop-tops, we handle it all.
Add master suites, family rooms, or home offices.
Add a second story to double your living space.
Accessory Dwelling Units for rental income or family.
Bright, airy additions to enjoy the outdoors year-round.
Attached or detached garages with optional living space above.
Architectural design that matches your home's style.
1. Feasibility: Assessing zoning and lot coverage.
2. Design: Creating architectural plans for the addition.
3. Permitting: Navigating complex city approval processes.
4. Foundation: Pouring solid foundations for the new structure.
5. Framing & Build: Rapid and precise construction.
6. Tie-in: Seamlessly connecting old and new spaces.
Additions are complex projects. We have the engineering and construction expertise to ensure your addition is safe, legal, and beautiful.
We build additions throughout the Denver metro area and Boulder. Contact us to discuss your expansion ideas.





Get in touch for a free
estimate. For emergencies, call 24/7.
Office Hours: Mon-Fri 8am-6pm • 24/7 Emergency Dispatch
Don't let water damage or construction needs wait. K&D Development is available 24/7 for emergency response.