QuiPlans — Licensed Structural Engineers · PE-Stamped Plans in 25 States
QuiPlans — 7,000+ Homeowners Served · Join the QuiPlans Community
QuiPlans — Permit Success Guarantee · Plans Accepted by Building Departments
QuiPlans — Permit-Ready Plans from $1,997 · Free ADU Floor Plan Available
QuiPlans — Plans Delivered in Days — Not Months · No Architect Required
QuiPlans — 4.9/5 Average Rating · Trusted by Builders Nationwide
examples: Backyard Home • Guest House • In-Law Suite • Rental Unit • Garden Cottage
Your Property May Have More Potential Than You Think.
See What You Could Build — and What It Could Be Worth.
Explore your property's ADU potential, estimated costs, rental opportunity, and the best path forward. Take our 2-minute assessment.
Already know what you want?
Take our 2-minute assessment — no credit card required
Your Starting Point
Start Wherever You Are
Whether you're exploring what's possible, already have an idea, or know exactly what you want, there's a path forward.
Exploring
I Don't Know What I Can Build
Get personalized recommendations based on your property, goals, and budget.
Start Free AssessmentDesigning
I Already Have an Idea
Create and visualize your own layout with the QuiPlans AI Designer.
Try AI DesignerReady to Start
I Already Know What I Want
Browse ready-made plans or move directly toward engineering and permitting.
Explore My OptionsReal Engineers · Real Homeowners · Real Projects
Engineering You Can Trust
Behind every QuiPlans project is a licensed Professional Engineer and a track record of thousands of completed projects.
7,500+
Projects Completed
Since 2002
Engineering Experience
25 States
PE-Stamped Coverage
Licensed PEs
On Every Project
Dr. Mir Emad Mousavi, Ph.D., P.E.
Founder · Licensed Professional Engineer · Lead Reviewer
Verify credentials on LinkedInDr. Mousavi has worked across residential engineering, permitting, inspections, and complex property conditions including flood zones, hillside lots, coastal requirements, and windstorm regions.
- Licensed Professional Engineer (P.E.)
- Multiple-State Project Experience
- Residential, Commercial & Industrial Background
- Permitting & Inspection Experience
- Complex Properties: Flood Zones, Hillside Lots, Coastal & Windstorm Regions
Real Homeowner Consultations — Not Stock Photography
Homeowner Consultation
Property evaluation with homeowners
Project Planning Discussion
Site feasibility review meeting
Engineering Assessment
Permit planning consultation
The Process
From Property Discovery to PE-Stamped Plans in 3 Steps
Each step builds on the last. Every purchase credits toward your next stage — no wasted money, no surprises.
Free Assessment
Understand your property's potential and get a recommended starting point.
- Personalized ADU recommendations
- Estimated build costs & rental income
- Your fastest path to permit
Engineer Review
A licensed PE reviews your property and confirms feasibility.
- Licensed PE reviews your specific lot
- Zoning, setbacks & utilities confirmed
- Written Go/No-Go report — review fee credited toward plans
PE-Stamped Plans
Move forward with professional plans for permit submission.
- Architectural + structural + MEP plans
- Signed & sealed by a licensed PE
- Accepted in 25 states · 10–14 day delivery
AI Designer
Design Your Own Home in Minutes
Have an idea already? Turn it into a floor plan with our AI Designer. Describe what you want, customize your layout, visualize your design, and continue refining it before moving into engineering and permitting.
Try the AI DesignerDesign it with AI. Bring it to life with licensed engineers.
AI design concepts are early design starting points — not permit-ready, code-compliant, or engineered plans. Professional engineering and permit documents are developed separately by licensed engineers.
Plan Library
Explore Designs
Studio to 3-bed ADUs · Garage conversions · Single-family homes
Financial Intelligence
See the Numbers Before You Build
Explore estimated costs, rental potential, and value ranges by ADU size.
$85K–$130K
$1,400–$1,900
$16,800–$22,800
$80K–$140K
Estimates are illustrative ranges based on national averages. Your results will vary based on location, market conditions, and final project scope.
Professional Services
Choose How Far You Want QuiPlans to Take You
Three service levels — from understanding what you can build to a complete permit-ready package handled for you.
$349
Engineer Review
"I need to know what I can build."
- Licensed PE reviews your exact lot
- Zoning, setbacks & utilities confirmed
- Written Go/No-Go report (PDF)
- Review fee credited toward any upgrade
From $1,997
PE-Stamped Plans
"I'm ready for professional plans and can handle permitting myself."
- Architectural + structural + MEP plans
- PE-stamped by a licensed engineer
- Accepted in 25 U.S. states
- 10–14 business day delivery
From $4,997
Complete Permit Package
"I want QuiPlans to handle the permit process."
- Everything in PE-Stamped Plans
- Site plan, drainage & grading, septic, utility plans
- ALL application revisions & resubmissions
- Permit submission & all city coordination
- Permit Success Guarantee (eligible projects)
💳 Start with 50% down
Balance split 25% Day 15 + 25% Day 30
Customer Stories
Built With Permit Confidence
"We didn't know if our lot was buildable. The feasibility study gave us a clear answer in days — not months. We're now permitted and breaking ground."
+$2,400/mo rental income
Marcus T.
Sacramento, CA
Feasibility + Permit-Ready
"Downloaded the free ADU plan, upgraded to the permit-ready package, and we were approved on first submission. Worth every dollar."
+$1,800/mo rental income
Priya M.
Austin, TX
Permit-Ready Package
"As a contractor I use QuiPlans for multiple clients. The plan quality is excellent and the PE stamps are accepted everywhere."
3 active projects
Derek W.
Phoenix, AZ
Builder Program
"From the free concept plan to full construction admin support — the process was clear and totally worth it."
+$180K property value
Alicia R.
Denver, CO
Construction Admin
Common Questions
Ready to Discover Your Property's Potential?
See What You Can Build — Free
Get a free starter plan, cost estimate, and personalized guidance. No credit card. No commitment.
Building Multiple Projects?
Explore solutions for builders, contractors, investors, and developers.
Questions before you start? support@quiplans.com · Our engineering team responds within 1 business day. · Refund Policy
All plans and engineering services are subject to local jurisdiction requirements and final approval. Permit-ready plans include engineering subject to site-specific review. Concept plans are not for construction or permit use. Available in 25 U.S. states through Licensed Structural Engineers, Inc. and partner network.
