Baltimore, MD
Overview
Baltimore County and Baltimore City both allow accessory dwelling units (ADUs) on most residential lots — separate-entrance apartments built into a basement, attic, garage conversion, or detached structure. We design and build code-compliant ADUs end-to-end: zoning research, permit pulls, structural framing, separate egress, kitchenettes, bathrooms, HVAC zoning, and electrical sub-panels. Common reasons our clients add an ADU: aging parents who want their own space without leaving the family, adult children who can't afford their own place yet, or generating $1,500–$2,200/month in rental income on a property they already own. Every ADU we build meets MD building code, gets inspected, and qualifies for legal rental registration where applicable. We'll walk the property, talk through what your county or city allows, and give you a fixed-price quote that covers everything from demo to the final certificate of occupancy.
Most residential lots in Baltimore County and Baltimore City allow ADUs by-right or with a minor variance, but rules vary by zoning district and lot size. We'll pull the zoning record for your address during the consultation — no charge — so you'll know before committing.
A basement or garage conversion is typically 10–14 weeks from permit to CO. A detached new-construction ADU runs 16–22 weeks depending on foundation work and utility runs.
Basement conversions usually run $85k–$140k. Garage conversions $95k–$160k. Detached new builds $180k–$300k+. Fixed-price quote at the consultation — no surprises mid-project.
Yes, once you complete rental registration with your jurisdiction. We'll guide you through the inspection requirements. Some HOAs restrict rentals — we'll flag that during planning.
For most ADU configurations, no. We might upgrade your service panel or add a dedicated water heater, but the main house stays as-is.
No obligation. We walk your space and give you a fixed-price quote.
Request Free Estimate (410) 598-9933Trust & Licensing
MHIC# 05-147079
PA HIC# PA177445
Licensed & Insured
Since 2010 · 500+ Projects
