Do You Need a Permit for a Roof? Roof Permits and Roof Framing Plans Explained
Most US cities require a permit to replace a roof, and almost all require one when you change the roof structure. A like-for-like re-roof usually needs only a simple permit with the roofing material and underlayment specified. Adding a new roof, changing the pitch, adding a dormer, removing a support or adding heavy loads like solar panels needs permit drawings with a roof framing plan showing rafters or trusses, beams, loads and connections.
When a roof needs a permit
Rules vary by city, but a permit is typically required for roof replacements over a certain area, any re-sheathing, and every structural change. Small repairs may be exempt. Homes in a historic district usually need design approval for roofing material, color and shape before the building permit; see historic district guidelines.
Re-roof vs. structural roof work
A permit for a simple re-roof usually covers materials only. You'll need roof framing drawings when you are:
- Building a new roof over an addition, garage, porch or patio
- Changing the roof pitch or shape
- Adding dormers or skylights that cut rafters
- Removing walls or posts that support the roof
- Adding solar panels or heavier roofing such as tile
What a roof framing plan shows
A roof framing plan is a top-down view of the roof structure. It shows rafter or truss layout, size and spacing, ridge and hip members, beams and headers, bearing walls, overhangs, and connection details such as hurricane ties and ridge straps. It is backed by the roof dead load, snow load and wind uplift for your location; see wind, seismic and snow load calculations and roof truss calculations for complex layouts.
Solar panels and roof permits
Solar arrays add weight and wind loads to the roof, so most cities ask for a structural check of the existing framing. Read solar panel structural integration for what that review covers.
Getting roof framing drawings
ArchPermits prepares roof framing plans and structural calculations for new roofs, additions, garages, patio covers and roof alterations. See our structural engineering drawings service.
Frequently asked questions
Do I need a permit to replace my roof?
In many US cities, yes, even for a like-for-like replacement. Check your local building department; small repairs are often exempt.
What is a roof framing plan?
A top-down drawing of the roof structure showing rafter or truss sizes and spacing, beams, ridge and hip members, bearing walls and connection details.
When do I need roof framing drawings for a permit?
When you build a new roof, change the pitch, add dormers, remove roof supports, or add heavy loads like solar panels or tile roofing.
Do roof trusses need engineering drawings?
Pre-engineered trusses come with manufacturer truss drawings. The permit set still needs a roof framing plan showing the truss layout, bearing points and connections.
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