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Expert Residential Remodeling Services in Washington, DC
Founded in 2008, Jannsen Design has spent over 15 years cultivating expertise in residential remodeling across Washington, DC and neighboring communities. Our approach prioritizes honest communication and collaborative problem-solving, ensuring clients feel heard at every project stage. With a dedicated in-house team, we deliver tailored solutions for whole-home renovations, kitchen transformations, and bathroom updates while maintaining deep respect for the architectural character of historic properties. Our reputation rests on consistent craftsmanship, transparent timelines, and personalized attention to each client's unique lifestyle needs.

By combining practical expertise with creative problem-solving, we transform aging spaces into modern, functional environments that reflect homeowners' visions. Client testimonials consistently highlight our reliability, attention to detail, and ability to navigate complex renovation challenges. Our commitment to quality extends beyond construction - we guide clients through permit processes, budget management, and design decisions with integrity. This philosophy, maintained since our founding, has established Jannsen Design as a trusted partner for homeowners seeking meaningful, lasting improvements to their living spaces.
Services
Bathroom Renovations House Additions Design Consultation Basement Finishing Window Restoration
Highlights and features
  • We offer 15+ years of combined experience in Washington, DC residential remodeling
  • Our team provides personalized design-build solutions tailored to client lifestyles
  • We maintain open communication throughout every project phase
  • Our in-house crew ensures consistent quality and accountability
  • We specialize in preserving architectural integrity during modern renovations
What people say
Excellent work Professional and responsive Beautiful craftsmanship Timely completion Creative solutions
Services
Bathroom Renovations
Transform outdated bathrooms into modern functional spaces with our expert renovation services. Our team handles complete gut-and-rebuild projects, fixture upgrades, and accessibility modifications while maintaining structural integrity. We coordinate plumbing, tiling, and finishing details to create cohesive, luxurious environments that maximize both form and function for homeowners across the DC metro area.
House Additions
Expand living spaces through custom home additions that seamlessly integrate with existing architecture. We specialize in creating master suites, family rooms, and entertainment spaces while navigating zoning requirements and preserving property character. Our construction team ensures proper foundation work, structural reinforcement, and energy-efficient integration throughout the addition process.
Design Consultation
Develop personalized renovation strategies through our comprehensive design consultation services. We evaluate structural possibilities, budget constraints, and lifestyle needs to create optimized space plans. Our designers collaborate with clients to select materials, finishes, and layouts while considering long-term functionality and maintenance requirements for all residential remodeling projects.
Basement Finishing
Convert raw basement spaces into functional living areas with our specialized finishing services. Our team addresses moisture control, insulation, and structural requirements while creating configured layouts for recreation rooms, home offices, or rental units. We ensure proper egress solutions, lighting, and finishing details that meet local building codes for safe, comfortable basement transformations.
Window Restoration
Preserve historic charm while improving energy efficiency through professional window restoration services. Our craftsmen repair and retrofit existing wood windows, replacing damaged components while maintaining original aesthetics. We implement weatherization techniques and modern glazing solutions to enhance thermal performance without compromising architectural integrity in older Washington, DC properties.
People
Neil
Founder & Lead Designer
With 15+ years leading Washington, DC remodeling projects, Neil combines architectural expertise with hands-on construction knowledge. He oversees all design phases, ensuring client visions translate into functional, beautiful spaces while maintaining strict quality control standards.
Questions
What areas do you serve for remodeling projects?
We primarily serve Washington, DC including Cleveland Park and Dupont Circle, plus Chevy Chase and Bethesda in Maryland.
What types of remodeling services do you offer?
We handle whole-home renovations, kitchen and bathroom remodels, basement finishing, window restoration, and custom house additions.
How long does a typical remodeling project take?
Project timelines vary by scope but average 4-6 months for full home renovations and 6-10 weeks for single-room remodels including permitting.
Can you work with existing architects or designers?
Yes, we collaborate with client-chosen architects while maintaining our role as general contractor to ensure seamless execution of design plans.
How do you handle unexpected issues during remodeling?
We maintain transparent communication throughout, providing detailed explanations and cost options before addressing any unforeseen challenges during construction.
What sets your remodeling approach apart?
Our in-house team's 15+ years of collaboration ensures consistent quality, while our client-focused process prioritizes clear communication from design through completion.