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ADU Construction in Northern Virginia

Fully self-contained living spaces designed and built on your property. One team handles architecture, design, permitting, and construction from the ground up.

ADU Construction That Solves Your Problems

You’ve already invested in your property — an ADU lets you get more out of it. Whether that means a private home for an aging parent, a source of rental income, or simply more room for a growing family, here’s how we approach the most common reasons homeowners come to us.

Select Your Issue Below:

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Issue:

Your Family Needs Space of Their Own

There’s nowhere comfortable or private for extended family, aging parents, or frequent guests. You want to keep everyone close, but the main home doesn’t offer the kind of independence and dignity a parent or adult child deserves.

A Separate Home for Aging Parents

Whether it’s a standalone structure on your lot (ADU) or a self-contained addition connected to the main home (ALU), we design and build spaces with everything needed to live independently: bedroom, bathroom, kitchen, laundry, and living area. If you’re not sure which option is right for your property, we’ll help you figure that out during the discovery call.

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Aging-in-Place From Day One

We build with accessibility as a core part of the design, not an afterthought. Wider doorways, zero-threshold entries, accessible bathrooms, and single-level layouts so your family member can live comfortably and safely for years to come.

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Privacy Without Distance

The goal is connection without compromise. The ADU is attached to or on the same property as your main home, so family is always close. But with a full kitchen, laundry, and private entrance, everyone has the space they need to live on their own terms.

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Issue:

Your Property Has Untapped Financial Potential

Rising costs and unused property space make you want to get more out of what you already own. You have the lot. You have the opportunity. You just need the right team to build it.

Rental Income From Your Own Property

A fully self-contained ADU with a bedroom, bathroom, kitchen, and living space can generate consistent rental income. We build to the standards and code requirements needed so your unit is permitted, legal, and move-in ready for a tenant.

Modern living room with a gray sofa, desk with chair, and glass-fronted bookshelf near multiple windows overlooking greenery. Light wood flooring and white walls.

Maximize Your Lot Without Moving

Instead of buying a larger property, build on the one you have. We assess your lot for feasibility, handle surveying and permitting, and design a structure that fits your property without compromising your yard or the character of your main home.

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Long-Term Property Value

A well-built ADU adds usable square footage and flexibility to your property. Whether you use it for family now and rent it later, or vice versa, it’s an investment that grows with your needs.

Modern bathroom with a rectangular vessel sink on a wooden vanity, wall-mounted faucet, large mirror, exposed brick wall, and a toilet.
Issue:

Your Home Has Run Out of Room

The family has outgrown the house, but you don’t want to leave your neighborhood, your schools, or your community. Remote work, hobbies, fitness, and daily life are all fighting for the same rooms, and nobody has enough space.

Dedicated Space for Modern Living

An ADU gives you a completely separate space for a home office, studio, gym, or flex room without taking square footage from the main home. The main house stays a home. The ADU handles everything else.

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Room for Adult Children or Extended Stays

Kids coming back from college, extended family visiting for months at a time, or a young adult who needs a transition space. An ADU provides a real home, not a guest bedroom, so everyone has room to live without stepping on each other.

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Stay in the Neighborhood You Love

You’ve built a life here. The schools are right, the commute works, and the neighbors are family. An ADU lets you add the space you need without starting over somewhere new.

Modern two-story home with white brick and dark grey mansard roof

How Your ADU Comes to Life

Building an ADU is a full construction project from the ground up, and we treat it that way from the very first conversation. One team handles every phase, so nothing falls through the cracks and nothing surprises you along the way.

Step 1

Discovery Call & Inspiration Collection

Step 2

Site Visit & Feasibility Assessment

Step 3

As-Built Creation & Design Concept

Step 4

Design Center Visit

Step 5

Updated Design

Step 6

Final Review & Contract

Step 6

Pre-Construction Prep

ADU Projects Across Northern Virginia

Imagine a second home on the property you already own. See how Northern Virginia homeowners created independent living spaces for family, income, and flexibility.

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Two sets of outdoor stairs with white railings lead to a house with gray siding and red brick; a grassy yard and an air conditioning unit are visible.

ADU Construction FAQs

Most ADU projects start at $275K. The biggest factors that impact cost are the size of the unit, whether it's a standalone structure (ADU) or attached to the existing home (ALU), the complexity of the foundation and systems work, site conditions, and the level of finish selections. We'll walk through pricing from comparable projects during your discovery call.

An ADU (Accessory Dwelling Unit) is a standalone structure on your property. An ALU (Accessory Living Unit) is connected to the existing home. Both include a bedroom, bathroom, kitchen, laundry, and living space so someone can live independently without relying on the main house. The process for building either is essentially the same.

Everything needed for fully independent living: bedroom, bathroom, kitchen, laundry room, and living space. We handle the full design, engineering, permitting, and construction. Popular materials include cabinetry, countertops, tiles, flooring, backsplash, and custom carpentry for creative storage solutions.

Yes. We manage the entire permitting process, including surveys, engineering, and zoning requirements. We pull permits on every project to ensure full code compliance and protect your property's value.

Many homeowners build ADUs with rental income in mind. We build to the code and permitting standards required so your unit is legal and move-in ready for a tenant. We'd recommend confirming local zoning and rental regulations for your specific property during the discovery phase.

Timelines depend on scope, site conditions, and permitting. An ADU is a full construction project from foundation up, so it takes longer than an interior remodel. We'll give you a realistic timeline during your discovery call and keep you informed with milestone check-ins throughout the build.

In Our Clients' Own Words

The trust we build doesn't end at the final walkthrough. Here's what families across Northern Virginia have to say about working with WISA.

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Ready to Build an ADU on Your Property?

Tell us what you have in mind and we’ll help you figure out exactly what’s possible on your property.

Ready to Build an ADU on Your Property?

Tell us what you have in mind and we’ll help you figure out exactly what’s possible on your property.

Ready to Build an ADU on Your Property?

Tell us what you have in mind and we’ll help you figure out exactly what’s possible on your property.