Why an ADU Might Be the Smartest Move
You Make in Clark County Right Now

Home prices are near all-time highs in the SW Washington/Portland metro –
here’s how adding a backyard unit changes the math for you. And why having
the right contractor makes all the difference.

If you own a home in Clark County, Battle Ground, Camas, Ridgefield, or anywhere in
the SW Washington/Portland metro, you’ve probably felt it – the pressure of a housing
market that just won’t let up. The average home value in Clark County is hovering
around $556,000, and that’s not going down anytime soon. For your kids trying to find
their own place, for your aging parents, or for anyone looking to offset their mortgage,
the traditional housing market isn’t offering easy answers.
But here’s what a lot of homeowners in our area are just now realizing: the solution
might already be sitting in your backyard.
An Accessory Dwelling Unit, an ADU , is a secondary living space built on the same
lot as your primary home. And right now, in this economy, in this market, it might be the
single smartest investment you can make in Clark County.

 

The housing crunch is real – and ADU’s are a local answer

Clark County and the broader SW Washington/Portland metro area is one of the fastest-growing regions in the Pacific Northwest. Demand for housing has surged while supply has lagged, pushing prices to historic highs and forcing families to make hard choices. Renters are spending more of their income on housing than ever. Young adults can’t afford to buy. Seniors on fixed incomes are feeling squeezed.

An ADU doesn’t just help you, it helps your community. Adding a well-built unit to your property increases the local housing supply in a neighborhood that already has infrastructure, utilities, and schools in place. It’s smart growth without sprawl.

Washington’s HB 1337 – passed in 2023 and now in effect for Clark County – requires local governments to allow up to two ADUs on any residential lot. That means more flexibility, fewer barriers, and a clearer path to getting your project approved than ever before.

What types of ADUs can you build?

 

Let’s be honest – building an ADU can be stressful

We’re not going to sugarcoat it. ADU projects are exciting, but they’re also genuinely complex. This isn’t like replacing your roof or redoing a bathroom. Building an ADU means navigating a web of decisions, regulations, and details that can overwhelm even experienced homeowners – and one wrong move early in the process can cost you serious time and money.

Here are just a few of the things that trip people up:

• Detached vs. attached – it’s not just a style choice. Choosing between detached and attached isn’t just a style preference – these two types follow different rules for setbacks, utility hookups, lot coverage, and permitting. What works on your neighbor’s lot may not work on yours.
• Urban vs. rural zoning matters enormously. Clark County treats urban and rural properties very differently. Detached ADUs aren’t allowed in all rural zones, and size and placement rules vary widely depending on where your property sits.
• Permits are not optional – and they’re not simple. A complete ADU permit application in Clark County requires a site plan, building drawings, utility documentation, stormwater plans, and more. Incomplete applications mean delays that can stretch for months.
• Utility connections have real costs and requirements. Most ADUs in Clark County must connect to public sewer and water, which means coordinating with the county and potentially upgrading your existing service.

Design standards have to match your primary home. Clark County requires ADUs to complement the character of the main house – materials, rooflines, exterior finishes. Getting this right requires experience.

The details matter more than most people expect. Homeowners who try to manage the permitting and planning process on their own often discover mid-project that something doesn’t comply – leading to costly redesigns, delays, or worse.

That’s exactly what Compass Contractors is here for

At Compass Contractors, ADUs are one of our specialties – and we’ve done this work right here in Clark County, navigating the same permit office, the same zoning codes, and the same challenges you’re facing. We know the difference between what works on an urban lot in Vancouver versus a larger rural parcel in Ridgefield. We know when a detached unit is the right call and when an attached addition makes more financial sense. And we know how to put together a permit application that doesn’t come back with a stack of correction notices.

From the first conversation about what’s possible on your property, to pulling permits, managing subcontractors, and handing you the keys – we’re with you every step. We’re an owner-operated company, which means Matt and Derek are personally involved in your project, not handing it off to someone who’s never set foot on your lot.

We’ve built 1,200 sq ft ADUs that came in on time and on budget. We’ve navigated Clark County’s permitting process dozens of times. Our clients tell us the biggest relief was simply not having to figure all of this out alone.

The Clark County rules – simplified

Clark County allows up to two ADUs per residential lot, and most urban residential zones allow both attached and detached units. Urban ADUs can be up to 1,000 square feet (up to 1,500 sq ft on lots 20,000 sq ft or larger). And thanks to recent code updates, the permitting process is more streamlined than it used to be – especially if you work with a contractor who knows the local system inside and out.

Impact fees for ADUs are capped at 75% below the standard multifamily rate in Clark County, and owner-occupancy requirements have been eliminated under state law, giving you more flexibility in how you use the space.

Why homeowners in Clark County are building ADUs right now

The reasons are as personal as the projects themselves. Some homeowners are building a unit for an aging parent who needs to be close but not in the same house. Others are housing a college-age child who can’t afford today’s rents. Many are generating rental income that meaningfully offsets their mortgage – and in a county where a one-bedroom apartment can easily fetch $1,400–$1,800/month, the numbers pencil out fast.

The market conditions, the updated state and county regulations, and the demand from renters and family members have all aligned in a way we haven’t seen before. There’s never been a better time to build – and there’s never been a better reason to make sure you do it right.

Is an ADU right for you?

If you own a home in Clark County and have usable lot space, there’s a good chance an ADU makes sense for your situation – whether that’s financial, personal, or both. The best first step is a conversation. We’ll walk your property, talk through your goals, explain the differences between your options, and give you a straight answer about what’s possible and what it’ll cost – no pressure, no runaround.