Battle Ground ADU Builder

Deciding on an ADU begins with what the site and the rules permit

An accessory dwelling unit can be a rental, a place for family, or a home office, but the first question is always what the site and the rules permit. JDI Construction is a family-owned, Vancouver-based design-build remodeler, and we treat an ADU as a second, independent home — which is why we start by confirming what your specific Battle Ground property actually allows before any design begins. That approach fits Battle Ground especially well: up in north Clark County, the mix of more rural, larger lots and newer subdivisions means feasibility looks different from parcel to parcel, and a generous lot often opens the door to a detached unit.

Our designers and trades work as one team, so the unit you approve is grounded in what the site and the code actually permit — we don't hand a hopeful floor plan to a separate crew and find out later it won't pass. Here's the range of ADUs we build, what decides what's possible, and what to expect on cost and timeline.

The parts that matter most

A handful of factors settle the shape of the whole project before design begins:

A few decisions worth making early

The choices that make or break an ADU arrive well before design. The first is feasibility: ADU rules — size limits, setbacks, height, parking, and fees — are jurisdiction-specific, set in Battle Ground by Washington and by the city or Clark County, and they differ from Portland's across the river. On a larger north-county lot the answer may be generous, but we still confirm what your specific parcel permits before drawing. The second is type and use: a garage conversion, a basement unit, an attached addition, and a detached cottage carry very different costs and site demands — and Battle Ground's bigger lots frequently suit a detached unit that would be a tight squeeze on a smaller in-town parcel. Whether it's a rental, family housing, or an office shapes the layout too. The third is budgeting for the parts you can't see — the sewer, water, and power connections and the system development charges that come with a new dwelling, which can run farther on a rural lot. We work through all of it up front.

What Battle Ground homeowners build ADUs for

The ADUs we're asked about in Battle Ground tend to serve a few purposes: a rental for income, a private space for aging parents or adult children, or a home office or studio separated from the main house. Each nudges the design its own way — a rental toward durable finishes and a private entrance, a multigenerational unit toward single-level accessibility, a workspace toward light and quiet.

Because Battle Ground sits in Clark County, the governing rules are Washington's and the city's or county's, which differ from Portland's — a reason we confirm what your parcel allows rather than assume. On the larger lots common across north Clark County, a detached cottage is often the natural choice. Whatever the use, we design the compact footprint to live larger than its square footage, with the light, storage, and ceiling height that keep a small home from feeling small.

What does an ADU cost in Battle Ground?

ADU cost is driven first by type: a garage or basement conversion that reuses an existing structure generally costs less than a detached cottage built from the ground up. After that come size and finish level, and then the part homeowners most often underestimate — the site and utility work. On the larger, more rural lots around Battle Ground, running sewer, water, and power to a new dwelling, handling grading and access, and covering connection fees can be a meaningful share of the budget, which is exactly why we scope them early. With design and trades both in-house, we give you an itemized estimate once we know what your lot allows and which type fits, so the number reflects your project rather than a generic per-square-foot figure.

How long does an ADU take to build?

An ADU runs on three clocks: feasibility and design, permitting, and construction. Permitting for a second dwelling can take longer than a remodel because it involves zoning and utility review, so we build that time into the plan rather than promising a quick turnaround. Once permits are in hand, construction depends on the type — a conversion is faster than a ground-up cottage, and a detached build on a larger Battle Ground lot may add site-prep and utility-run time. We give you a realistic schedule after the feasibility check, handle the permitting, and keep you updated through our client portal as the unit comes together.

Why homeowners in Battle Ground choose JDI

An ADU rewards a builder who understands the rules as well as the construction, because the project can stall at the permit counter long before the first wall goes up. As a single accountable design-build team, we handle the feasibility, the design, the utility connections, and the build under one roof, so nothing gets lost between a zoning question and the crew on site. We manage the permitting, keep you informed through our client portal, and stand behind the work with a five-year workmanship warranty. Battle Ground is a short drive north of our Vancouver base, so we stay responsive throughout a project this involved.

JDI Construction — "Built by family. Trusted by neighbors." Design-build remodeling and ADU construction based in downtown Vancouver, WA, serving Battle Ground, north Clark County, and the greater Portland–Vancouver metro since 2007.