Structural drawings
Framing plans, foundation plans and shear-wall schedules keyed to your architectural set — sheet-numbered and plan-check ready.
Commercial structural engineering · California
Tenant Improvements & Small Commercial — Engineered Without the Big-Firm Overhead.
Structural modifications, equipment loads, storefront openings and TI packages for small commercial projects — scoped online and quoted at a fixed price.
What's the project?
60 seconds · Free · No obligation
Step 1 of 4
- California PE-licensed engineers (CA & NV)
- Fixed-price quote — no hourly billing
- No commitment until you accept
- Corrections included per proposal
What's the project?
60 seconds · Free · No obligation
Step 1 of 4
California PE-licensed engineers
Fixed-price proposals
Permit-ready documents
Corrections handled
How it works
From this page to permit-ready plans.
- 1
Today — about a minute
Answer a few questions & tell us where to send the quote
Plans, photos, sketches or a permit letter. Don't have everything? Send what you've got.
- 2
Within 1 business day
Free scope review → fixed-price proposal
A defined scope, one price and a stated turnaround. Your quote stays valid for 30 days.
- 3
After you accept online
Engineering starts — track it live
E-sign, pay the deposit by card or ACH, and watch status through delivery on your dashboard.
Your quote
One fixed price. In writing. Before you commit.
- Free scope review — you pay nothing to find out what your project needs
- A fixed price for a defined scope; additional work is only ever quoted, never surprise-billed
- Your quote stays valid for 30 days while you line up your contractor
- Plan-check correction rounds included per the proposal
Typical small-commercial triggers
- Cutting a new opening in CMU, tilt-up or a braced line
- Rooftop units heavier than what the joists were designed for
- Mezzanines, equipment platforms and racking over height thresholds
- A building department requiring an engineer of record on the TI
Sound familiar? Answer 3 questions and get your fixed-price quote →
Deliverables
What you receive
A complete, engineer-reviewed structural package — the same documents a full-service firm produces, delivered through your project dashboard.
What you receive
Structural calculations
Gravity and lateral calculations that match the drawings, member by member, so plan checkers can follow the load path.
Details & connections
Beam-to-post, holdown, footing and connection details your framer can build from — no guesswork on site.
Plus permit-correction responses and revisions through the same project. Get your quote →
Pricing, honestly
What actually drives the price
No two projects price the same — these are the factors our engineers scope. You get one fixed number after a free review, not an hourly meter.
Building type
Wood, steel, CMU and tilt-up each carry different analysis and detailing.
Existing documentation
Original drawings speed everything up; missing ones mean field data and conservative assumptions.
Scope of modification
One RTU and a full TI with new openings are different packages.
Jurisdiction and occupancy
Commercial plan check is stricter; the set is prepared accordingly.
The risk is on us: free scope review, fixed price, and no commitment until you accept.
Get My QuoteWhy JAT
Built like software, reviewed like a firm.
The engineering is the same discipline you'd expect from any licensed structural firm. The way you order it, track it and receive it is not.
Comparison with a traditional engineering engagement
| The usual way | With JAT Engineering | |
|---|---|---|
| Getting a quote | Phone tag, site visit scheduling, waiting weeks for a proposal | Upload plans or photos online; defined scope and fixed price after review |
| Knowing where things stand | Emails and voicemails | One status per project, visible in your dashboard 24/7 |
| Documents & revisions | PDF attachments scattered across inboxes | Versioned drawings, calcs and permit comments that stay with the project |
| Plan-check corrections | A new conversation and often a new invoice | Submitted back through the same project — rounds included per proposal |
| Repeat projects | Start from scratch every time | Duplicate a past project or use a template — under two minutes |
| Paying | Paper invoices and checks | Card or ACH online; deposit to start, balance before final release |
Before you ask
Can you act as engineer of record for a TI?+
Yes, for the structural scope of small commercial projects. The licensed engineer responsible for the work reviews and approves every deliverable, and documents are signed and sealed where required.
We don't have the original building drawings.+
Common. Photos, measurements and (when available) city microfilm records usually cover it; the scope review will tell you exactly what's needed before you commit.
How is commercial priced?+
Fixed-price per defined scope after a free review — the same process as our residential work, sized for commercial plan check.
Tenant Improvements & Small Commercial — Engineered Without the Big-Firm Overhead.
Three questions, a free scope review, and a fixed-price quote — usually within one business day.
No commitment required to submit a project for review.