Thinking about expanding your home in Washington DC? Whether you need more space or want to upgrade your living areas, understanding the costs is a big first step. From kitchen expansions to second-story additions, this blog covers all you need to know about home addition costs and design ideas.

Let’s dive into a few of the most common home additions and see how you can transform your living space!

What is an Addition?

This might sound like a silly question, but there are two main types of additions for you to think about when you want to add a new space to your D.C. home.

An addition can either be within the existing footprint of your home or involve adding extra square footage. Adding square footage typically means building out the foundation and roof, which naturally increases the cost.

A professional and trustworthy design-build team can assess your home, learn to understand your goals, explain the process with transparency, and help you decide if adding square footage is necessary to achieve your design to give you the space you need.

How Much Does an Addition Cost in DC?

Let’s explore the different types of home additions and their costs in the DC area.

(Pro Tip! If you don't see the addition you would want for your home on this list, we've included a few more ideas below, and you could reach out to us to find out about what your unique design could cost.)

How Much Does a Kitchen Expansion Cost in D.C.?

Feeling a little cramped in your kitchen? Maybe your cabinets are overflowing, you desperately need more natural light, or you're tired of living a life sans a kitchen island. Expanding your kitchen within your home’s existing footprint can cost around $180K.

A kitchen expansion can afford you and your family more cooking space, a back kitchen, extra storage, a larger dining area, or a cute little breakfast nook. 

This type of remodel can include new and additional cabinets, more counter space, new appliances, and even that coveted kitchen island.

The sanity a larger kitchen can give you and your family is invaluable. From your everyday routines to entertaining dinner guests and hosting special occasions, a larger kitchen just makes everything easier. 

How Much Does a Primary Bathroom Addition Cost in DC?

Adding a primary bathroom to your home typically costs between $200K and $225K. This type of remodel is going to add to your home's square footage and your quality of life.

This addition can transform your primary bedroom into a luxurious suite. Imagine morning routines starting off the way they're intended—peacefully, well-lit, and with everything in its place with plenty of storage. 

Design ideas include:

• Large soaking tub
• Walk-in or curbless shower
• Wet room
• Double vanity
• Heated floors
• Custom lighting plan with recessed lights on dimmers, scones, pendant lights
• Smart features

How Much Does a Full Bathroom Addition Cost in DC?

Adding a full bathroom within your home’s footprint can cost between $65K and $90K, while adding square footage to create the addition can range from $200K to $225K.

An additional full bathroom is often necessary for growing families or homes with frequent guests. Morning routines with multiple children will go smoother, your guests won't have to share a bathroom with the kiddos, and you'll have more storage so bathrooms can (hopefully) stay neat and tidy.

Design ideas include:

• Efficient layouts with modern fixtures
• Stylish tile work
• Plenty of custom or semi-custom storage
• Tub/shower combo with glass enclosure
• Stamped patterned ceramic tile flooring for slip resistance and style
• Possible accessibility features for older guests

How Much Does a Mudroom or Laundry Room Addition Cost in D.C.?

Mudrooms and laundry rooms are must-have additions for any home. Adding these rooms within your home’s existing footprint can cost between $30K and $50K, while building out can range from $200K to $250K.

Mudrooms keep dirt and mud from being tracked further into the home. No longer should you find little piles of random items, backpacks, leashes, or dirty shoes strung about the house. At least, that's the goal. And don't get the wrong idea with the name; a mudroom can be a very stylish space with finishes that complement the rest of your home.

Mudroom design ideas include:

• Dog washing station
• Sink
• Custom built-in lockers
• Cabinet space for sports equipment, shopping bags, etc.
• Durable ceramic tile flooring

Laundry rooms are far superior to the laundry closet in every way. Having a complete room with enough space to store, fold, stack, sort, and hang will keep your hallways free from baskets. Many homeowners prefer to have their laundry room near the kitchen, and it's easier and less expensive to place plumbing lines near where they already exist. 

Laundry room design ideas include:

• Sink 
• Custom shelving and cabinets
• Durable ceramic tile or luxury vinyl tile
• Quartz countertops

How Much Does an Attic Conversion Cost in DC?

Converting your attic into a livable space typically costs around $250K in D.C. If your attic sits empty—except for that collection of cobwebs—you're missing out on a lot of livable square footage! Just like an unfinished basement, converting your attic can give your family that space you've been wanting.

Design ideas include:

• Extra bedroom
• Home office
• Playroom 
• Crafting space
• Yoga studio

How Much Does a Second-Story Addition Cost in DC?

Adding a second story to your home is a major project and starts at $400K and can go up from there. There are three main types of second-story additions: a partial second story, a full second story, and a two-story addition (extending the home vertically and horizontally). 

If your family is growing, you're planning to move in an older relative, or you've simply always wanted more breathing room, a second-story addition opens up a whole world of possibilities!

More Addition Ideas for Your D.C. Home

Wine Cellar

A wine cellar is perfect for wine enthusiasts looking to store their collection in ideal conditions. It’s great for hosting tasting nights with friends. With wooden racks, ambient lighting, a tasting table, and high-end finishes, you and your friends will feel like you're in a swanky wine bar without all the noise and long lines. This addition can add a sense of luxury and sophistication to your home, making it a standout feature.

Home Office

A home office provides a quiet, dedicated space for productivity. It’s essential for remote work and video calls. Include custom built-in storage, ergonomic furniture, soundproofing, and plenty of natural light for a productive day. A well-designed home office can improve your work-life balance and increase overall home value at the same time.

Second Family Room

A second family room offers a relaxed space for entertainment and family time. It’s perfect for movie nights, games, or just lounging around. Design features could include a large sectional sofa, a big-screen TV, a Bluetooth sound system, and smart features. 

Bedroom Additions

Adding extra bedrooms is ideal for growing families or visiting guests. It increases both your home’s functionality and resale value. Don't forget to include ample closet space, en-suite bathrooms, and plenty of natural light. Additional bedrooms offer flexibility for various uses, such as a guest room, home office, craft space, or playroom.

Home Gym

A home gym provides convenience and privacy for workouts and wellness. It promotes a healthy lifestyle without even leaving the house. Consider adding rubber flooring, mirrors, high-quality equipment, and a sound system.

This addition eliminates gym memberships and travel time, making it easier to maintain a fitness routine. Include an area with a kid-friendly play area to keep the little ones within sight and never miss a workout!

Library

A library offers a quiet retreat for reading and relaxation. It’s perfect for book lovers to have a dedicated space. Double up and include space for your music collection for a dynamic space that'll feel like your own private escape. Built-in bookshelves, comfortable seating, good lighting, will create a classic, cozy atmosphere. 

Sunroom

A sunroom brings the outdoors in, offering a bright, cheerful space year-round. It’s great for plants, enjoying your morning cup of coffee, or entertaining a few friends over wine. This addition increases natural light in your home, offering a whole host of wellness benefits.

Media Room

A media room is ideal for movie buffs and gamers. It provides a dedicated space for entertainment with optimal sound and picture quality. Design ideas include comfortable recliners, soundproof walls, a large screen, and surround sound. This addition creates an immersive experience for family and friends, enhancing your home entertainment options, not to mention giving your teen a spot to invite friends for a night in. 

Do You Need a Permit to Build an Addition in DC?

Yes, you will definitely need a permit to build an addition in Washington D.C. Permits ensure that your project complies with local building codes and regulations, making sure your space is safe and upholds the highest quality standards.

The process typically involves submitting detailed plans for approval and scheduling inspections during construction. Working with a knowledgeable design-build contractor can help navigate the permitting process smoothly, ensuring all legal requirements are met without you having to do a load of homework to stay on top of it. 

Is a Home Addition a Good Investment?

Absolutely! Home additions generally offer a high return on investment (ROI), especially for key areas like kitchens and bathrooms. Besides financial gains, additions enhance your quality of life by providing extra space and improved functionality. Whether it’s for a growing family or increasing your home’s market appeal, an addition is a wise investment for value and quality of life.

How to Find a Good Home Addition Company in D.C.

Finding a reputable company for your home addition is a big deal. Here’s how to ensure you choose the right one:

Check Out Portfolios

Review the company’s portfolio to see examples of their past projects. This will give you an idea of their style, capabilities, and attention to detail, ensuring they can handle your project and give you the design and function you're looking for.

Read Reviews

Check online reviews and testimonials to learn about the experiences of past clients. Look for consistent positive feedback on quality of work, reliability, and customer service. You'll want to read more reviews than you think you need to in order to find patterns in other homeowners' experiences. 

Schedule Consultations

Meet with potential contractors to discuss your project. This will help you gauge their professionalism, expertise, and how well they understand your vision. Arrive with a list of questions and take notes to keep things straight. Pay attention to your instincts; this is a team you'll work with for months, so you'll want to ensure you will be able to build a foundation of trust. 

Let's Have a Chat!

Adding to your home can be exciting but a little nerve-racking, making it important to choose a team that's a good fit. Whether you’re expanding your kitchen, adding a primary bathroom, or building a second story, give us a shout. We'd be happy to have a conversation about your goals and help guide you through the process. Let’s get started on making your dream addition a reality!