Home Addition Permit Drawings
An addition has to work with a house that already exists. That means verifying existing framing, matching floor and roof lines, tying new structure into old, and extending electrical, plumbing and HVAC, all on paper before the plan checker sees it. Missing tie-in details are the most common reason addition permits get sent back.
We prepare full permit sets for room additions, second-story additions, bump-outs, sunrooms, basement and attic conversions, and major remodels.
- 3–7 days
- 98% first-time approval
- PE stamp in all 50 states
What's in your drawing set
- Existing and proposed floor plans, clearly distinguished
- Exterior elevations matching the existing roof and materials
- Building sections with ceiling heights and roof pitch
- Foundation and framing plans with new-to-existing connections
- Structural calcs and PE stamp where required
- Electrical, plumbing and HVAC extensions
- Energy compliance for the new envelope
- Site plan with setbacks and lot coverage
Projects we draw
- Room and bedroom additions
- Second-story additions
- Kitchen and bath bump-outs
- Sunrooms and four-season rooms
- Basement and attic conversions
- Whole-house remodels
How it works
- 01
Send your project details
Address, a sketch or photos, and what you want to build. We confirm your city's requirements before drawing.
- 02
We draw and code-check
Your set is drafted to your jurisdiction's adopted code and checked the way a plan reviewer would check it.
- 03
You submit, we support
You get a permit-ready set, and we respond to any plan-check comments until it's approved.
Drawings delivered in 3–7 days. City review time after submission depends on your jurisdiction.
Frequently asked questions
Do I need an architect for a home addition?
Many jurisdictions don't require a licensed architect for single-family additions, but nearly all require complete, code-compliant drawings, and often an engineer for structural changes. We provide the full set and add a PE stamp where needed.
Can you add a second story to my house?
Usually. The existing foundation and walls must be verified to carry the new load, so we include the structural assessment and any reinforcement in the drawings.
Will the drawings show my existing house too?
Yes. Plan checkers need existing and proposed conditions side by side, and we document both.
What do you need from me to start?
Your address, photos, rough measurements of the existing house (or existing plans if you have them), and a description of what you want to add.
Already have drawings that just need a seal? See our PE stamp & seal review.
Guides for this project
- Residential Permits & AdditionsThe Ultimate Checklist for Residential Addition Permit DrawingsRead guide
- Residential Permits & AdditionsSunroom Addition Permits: What Your Drawings Need to IncludeRead guide
- Residential Permits & AdditionsBasement Conversion Permit Drawings: Egress Windows and Ceiling Height RulesRead guide
Get your home addition drawings started today
Permit-ready drawings in 3–7 days, checked against your city's code.