Denver ADU Guide · a Cited Guide site

Guide · Problems and recourse

When a Denver ADU project goes wrong (2026)

LAST VERIFIED: SEPTEMBER 2026 · SOURCES: DENVER CPD, COLORADO MECHANICS' LIEN STATUTE, BBB

Direct answer: Most Denver ADU projects that go wrong fail at one of four points: a permit rejection (fixable, usually a drawing issue), a builder who stalls or abandons the job (a contract and licensing problem), a dispute over change orders (a scope problem from the quote stage), or quality doubts after the fact (an inspection problem). Each has a specific, local route to resolution below, and in every case the first step is the same: get the situation in writing, dated, before the next conversation.
§1 · PERMIT REJECTED

"My Denver ADU permit keeps getting rejected"

Denver CPD returns plan-review comments, not verdicts; a rejection is a list of items to resolve. The common ones for ADUs: bulk-plane or setback encroachments on narrow lots, missing fire-separation details near property lines, egress window sizing, incomplete site plans (drainage, utilities), and, in historic districts, landmark design review not yet cleared. Ask your designer to address each comment in writing, resubmit, and request a pre-resubmittal meeting if the same comment repeats. If the builder is handling permits and the rejections are recurring, that is information about the builder. Consider a separate architect or permit expediter for the resubmittal; Denver has several who work ADUs specifically.

§2 · BUILDER STALLED OR GONE

"My contractor abandoned my ADU project" / "who can finish a half-built ADU"

  1. Document: photos of current state, all payments, the contract, and every communication, dated.
  2. Written notice: a dated letter citing the contract's performance terms and a cure period (commonly 10 to 14 days). Certified mail plus email.
  3. Permit status: check the permit in Denver's portal. An abandoned permit has inspection deadlines; a new contractor must take over the permit formally, not build on the old one.
  4. Lien check: confirm no subcontractor or supplier liens have been filed against your property for unpaid work; Colorado mechanics' lien rules give subs rights against your home even if you paid the general contractor.
  5. Replacement: takeover work is priced higher because the new builder inherits unknowns. Prefer firms that state takeover or "finish" work explicitly, get a written assessment of existing work first, and expect some rework.
  6. Recourse: BBB complaint, Denver CPD contractor licensing complaint (licensed contractors can face discipline), and small claims or civil court depending on the amount. Consult a Colorado construction attorney for anything over a few thousand dollars.
§3 · CONTRACT AND QUALITY

Contract review, independent inspection, and getting multiple bids

Contract review: a Colorado construction attorney reviews an ADU contract for a few hundred dollars. Worth it above roughly $50K. The items to insist on: fixed price or clearly capped allowances, a change-order process requiring written approval before work, a payment schedule tied to milestones and inspections rather than dates, lien waivers with each payment, and a dispute-resolution clause.

Independent inspection: Denver's inspectors check code compliance at required stages; they do not assess workmanship. A licensed home inspector or an independent construction consultant can inspect at framing, pre-drywall, and completion for a few hundred dollars per visit. Pre-drywall is the one that matters most; everything is visible and nothing is finished yet.

Getting multiple bids without ten phone calls: write a one-page project brief (lot address, ADU type, size target, finish level, timeline), attach the eleven-line quote template, and send it to three to five builders from the comparison table who match your project type. Builders who respond on your template are self-selecting for the kind of clarity you want.

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