Permit-ready ADU plans, from $3,500.
Studio, one-bedroom, and two-bedroom plan sets designed for Boston-area lots — complete drawings with engineering, tailored to your property, and ready to file within two weeks of plan selection.
Plans and engineering only — we don't build. Your contractor works from our permit-ready set.
Will an ADU fit your lot?
Send your address and we'll tell you what fits, and which plan package suits it — usually within one business day.
Something went wrong sending your message. Please try again, or email us directly at [email protected].
No payment, no obligation. We reply within one business day.
Fixed pricing
$3,500–$4,500 for a complete plan set. No hourly design fees, no open-ended custom process.
Permit-ready
Every plan is designed to meet BPDA and Article 53 requirements, so you skip months of review cycles.
Tailored to your lot
Site-specific adjustments by our principal engineer are included with every package.
Three packages. One clear price each.
| Plan | Approx. Size | Investment | Includes |
|---|---|---|---|
| Studio ADU | 400–550 sf | $3,500 | Complete plan set, BPDA-compliant design |
| 1-Bedroom ADU | 550–750 sf | $4,000 | Plan set + structural engineering |
| 2-Bedroom ADU Most Requested | 800–900 sf | $4,500 | Plan set + full structural engineering — largest layout |
Site-specific tailoring is included with every plan. Larger custom modifications — different footprints, added levels, accessibility features — are available by inquiry.
Real drawings, not concept sketches.
Eight layouts from the current set, shown here at reduced scale — five 2-bedroom and three 1-bedroom. Studio sizing varies more by lot, so those drawings are shared once you're underway.
Five 2-bedroom plans.
Our most requested package, including the layout we drew for the built Norwood ADU, an attached configuration, and one over a two-car garage.
892 SF · Attached
2 bed · 1 bath + powderExample of an attached configuration. Attached ADUs add ~$3,000 for the as-built tie-in — quoted by inquiry.
Download
897 SF · Over Garage
2 bed · 1 bathTwo-car garage below, 10' living ceiling above. Custom adaptation, quoted by inquiry.
Download
Three 1-bedroom plans.
Each one is a single bedroom with a full bath, kitchen, and open family room — drawn at three different footprints so you can match the plan to what your lot allows.
480 SF
1 bed · 1 bath20' × 24'. Laundry closet off the hall, walk-in shower, separate coat and bedroom closets.
Download
504 SF
1 bed · 1 bath24' × 21'. Egress window in the bedroom, shower or tub, 24" pantry, two entries.
Download
648 SF
1 bed · 1 bath27' × 24'. The largest of the three — kitchen island, 30" pantry, coat closet, two entries.
Download
Drawings shown at reduced scale for illustration and watermarked against reuse. Every set includes site-specific tailoring to your lot before filing.
A complete drawing set, not a floor plan JPEG.
Every package is the full document set a custom architect would produce over months — coordinated with licensed Massachusetts architects and engineers.
Dimensioned floor plans
Fully dimensioned layouts drawn to scale, ready for your contractor.
Elevations & building sections
All four elevations plus cross-sections showing heights, materials, and structure.
Structural engineering
Included with 1-bedroom plans and up — stamped-ready framing and foundation design.
BPDA & Article 53 compliance notes
Documentation mapping the design to Boston's ADU requirements, so review goes smoothly.
Common questions.
Which plan is right for my lot?
Tell us your property city, lot type, and goals in the form below and we'll recommend the best-fit package — usually within one business day. Most Boston-area lots that fit a 2-bedroom footprint choose the 2-bedroom set for rental flexibility.
Is the price really fixed?
Yes. $3,500, $4,000, or $4,500 depending on the package, including site-specific tailoring. Only larger custom modifications — different footprints, added levels, accessibility features — are quoted separately.
How fast can I file for permit?
Most clients receive a filing-ready set within two weeks of selecting a plan. Site conditions and survey availability can affect the schedule.
Do you build the ADU too?
No — we're a design and engineering firm, not a construction company. You receive a complete, permit-ready plan set and your contractor builds from it. That separation keeps our pricing fixed and our recommendations honest.
What areas do you serve?
Boston, Cambridge, Newton, Brookline, and surrounding Greater Boston communities across Massachusetts.
Get a plan recommendation for your lot.
Tell us about your property and we'll recommend the right package, with pricing and timeline — usually within one business day. No phone calls, no pressure.