Lewis County · Chehalis
Chehalis, Washington treats a detached ADU and an attached ADU as two different things, with different parking rules. Solis installs the drywall scope for either from the approved plans.
View the full ADU Drywall Installation & Finishing in Western Washington service page →
The city's use chart lists a detached ADU and an attached or internal ADU separately. The detached type requires no parking within half a mile of transit and two spaces otherwise, while the attached type requires none near transit and one otherwise. Both are allowed in R-1, R-2, R-UGA, R-3, R-4 and EPF. Ordinance 1122B sections 23 and 24 (2025) and Ordinance 1125-B (adopted 2026-07-27). Approved plans and the local authority determine the requirement; Solis scopes the listed drywall work and coordinates the relevant handoff.
A detached ADU is a small separate structure with its own ceiling, insulation and service runs. An internal or attached ADU shares walls, floors and often a ceiling plane with the main house, so the board has to tie into an existing assembly. That difference decides how the board ties in and how the finish runs across the join.
Access, occupied-room protection, substrate condition, ceiling height, and the requested finish all change the work sequence in Chehalis, Washington. Send photos, dimensions, and the drawings or finish notes already available so Solis can separate visible drywall work from questions for the designer, inspector, or another specialist. For an ADU, the approved wall and ceiling details control fire, sound, and air-sealing questions; Solis prices the listed drywall work without promising a permit or inspection result.
These local conditions help us ask better questions before we price the drywall scope.
Chehalis two ADU use types
The use chart lists detached and attached or internal ADUs separately, with different parking rules, both allowed in R-1, R-2, R-UGA, R-3, R-4 and EPF. Ordinance 1122B and 1125-B.
Chehalis detached versus internal scope
A detached ADU is a small separate structure. An internal or attached ADU shares walls and often a ceiling plane with the house, so the finish has to run across the join.
Chehalis ADU use chart
Detached and attached differ
The use chart lists detached and attached or internal ADUs separately, with different parking rules, both allowed in R-1, R-2, R-UGA, R-3, R-4 and EPF. Ordinance 1122B and 1125-B.
Chehalis ADU attachment type
The join decides the work
A detached ADU is a small separate structure. An internal or attached ADU shares walls and often a ceiling plane with the house, so the finish has to run across the join.
Send wide and close photos, room dimensions, ceiling height, access notes, and the finish or project documents you have. Those details help us identify the practical next step before a site review.
Design approvals, permit decisions, hazardous-material testing or abatement, structural engineering, restoration drying, and other specialist work remain separate when the project requires them. We identify that boundary before pricing the drywall scope.
