BuildSpec vs UpCodes
UpCodes is the established product in this category and on one row below they are clearly ahead of us. This page is written so you can check every line of it: every BuildSpec figure is computed from our database when the page is built, and every UpCodes figure carries the date it was observed and how.
UpCodes observations recorded from a paid UpCodes account walkthrough and from their published pricing page, 27 August 2026. Their product changes without telling us, so check up.codes/pricing ↗ before relying on a figure in the UpCodes column. If a row here is out of date, tell us and we will correct it and say that we did — the same way we handle our own mistakes on the correction record.
| BuildSpec | UpCodes | |
|---|---|---|
| Entry price | Reference $39/mo Same price. The difference is what is inside it, not what it costs. | Essentials $39/mo |
| AI tier price | Advisor $59/mo | Professional $59/mo |
| AI questions — free, no card | 1 cited answer per day, every day | None |
| AI questions — on the $39 plan | 5 cited answers per day Their limit is a lifetime total, not a daily or monthly one — observed 27 August 2026. At $468/year that plan reaches its fourth AI question never. | 3 questions, for the life of the account |
| AI questions — on the $59 plan | Unlimited | Unlimited |
| State DOT standard specifications | Full text, 50 of 50 states, free to read without an account State DOT specification books are state-authored public documents. BuildSpec publishes them in full; UpCodes does not carry them at all. | Not carried |
| Permit fee data | 2,208 jurisdictions, 154 with a fee schedule located and dated | Not carried |
| Permit fee tables without paying | 3 fee schedules a month on a free account | n/a — no permit fee data |
| Building code text coverage They win | 9,454 distinct sections across 358 editions This is the row where they are ahead, and it is not close. UpCodes publishes adopted code as enacted by each jurisdiction, with amendments, and has defended that in court. BuildSpec holds model text and is building the per-jurisdiction adoption records that let it be published the same way — 23 of 51 states have a verified adoption record so far, and 1 is serving adopted text. If adopted code with amendments is what you need today, they have it and we do not. | Jurisdiction-specific adopted codes with amendments, across most US jurisdictions |
| Fire-rated assemblies They win | Verified listings with the source citation on the public page; layer detail paid Their library is far larger. Ours is smaller and each verified entry names the listing it was checked against. Count observed 27 August 2026. | 13,356 assemblies, walled |
| What a locked preview shows you | The real record — designation, rating, source citation, live counts Observed 27 August 2026: their walled produced-content pages render lorem-ipsum-style filler behind the paywall rather than a real excerpt. BuildSpec's previews are built from the stored record; if that ever stops being true, the line saying so comes off the paywall cards first. | Placeholder text |
| Published error log | Yes — /why-buildspec lists what we removed, why, and which integrity checks are failing right now | None found |
| Accuracy claim | None published. Every answer cites the verified section it came from, with a verification date. Their figure comes from a whitepaper they commissioned. As observed 27 August 2026 it publishes no question set and no transcripts, and its question mix excludes permit-cost and state DOT specification questions. BuildSpec is not publishing a competing percentage until an independent grader has produced one — see /code-accuracy for the pre-registered questions and the method. | “93% weighted accuracy, 2× generic AI” |
| AI crawlers | Allowed by name, and every allowed route is checked to serve a real server-rendered body Observed 27 August 2026. An allowlisted route that returns an empty shell spends a crawler's budget and gives it nothing — which is why BuildSpec's build fails if any route named in robots.txt stops rendering server-side. | Allowed by name; /code-accuracy served no server-rendered body |
UpCodes’ $39 plan includes 3 AI questions. Ever.
Our free account includes a cited answer every day.
Observed 27 August 2026. Both halves are checkable: theirs on their pricing page, ours by making an account and asking.
Where you should pick UpCodes
If your work is jurisdiction-specific adopted building code with amendments — a plan reviewer’s day job — UpCodes has that today and BuildSpec does not. We publish model code text and are building the per-jurisdiction adoption records that let adopted text be published on a defensible basis, state by state. That work is public: the current count is on our correction record, and it is a small number.
Pick BuildSpec if you need state DOT specifications, permit fee data, or an AI you can use more than three times.