Key takeaways
- On its own, Claude should not measure quantities off a drawing set — it has no scale, no symbol legend and no way to show its work.
- With the Aginera connector, Claude does not measure either: it reads a takeoff Aginera already produced — every item with the sheet it came from, measured runs with lengths, and the schedules as rows.
- The estimator still owns scope, rates and the final number. Claude does the reading, totalling, cross-checking and paperwork around the quantities.
- Setup is one click in Claude (Settings → Connectors → Aginera). Reading your projects and takeoffs is free; new takeoffs and a clean DWG use your Aginera credits, and Claude asks first.
What Claude actually does in construction estimating
An estimate is two different kinds of work. One is reading and reasoning: understanding the scope, spotting exclusions, cross-checking drawings against specifications, keeping a pricing template tidy, writing the RFIs and the letter of offer. Claude is genuinely good at that. The other is measurement: how many fixtures are on E-201, how many metres of 1" conduit feed panel LP-2, what the equipment schedule says. That work needs a scale, a legend and an audit trail — and a chat model looking at a drawing image has none of them.
The common advice is therefore to keep Claude away from quantities altogether. That is right for Claude on its own. It stops being the whole story once Claude can call a takeoff engine. With the Aginera connector, Claude never measures anything: it asks Aginera, which has already read the drawing set sheet by sheet, and gets back structured quantities it can total, compare and explain — each one pointing at the sheet it came from.
Who does what: estimator, Claude and Aginera
| Task | Estimator | Claude | Aginera |
|---|---|---|---|
| Understand the scope and exclusions | Owns it | Summarises specs and addenda you give it | Classifies every sheet by trade and drawing type |
| Count and measure from the drawings | Reviews and signs off | Never guesses — asks Aginera | Takeoff: items with sheet references, measured routes, schedules |
| Check the takeoff | Accepts, rejects, overrides | Flags gaps, compares sheets, totals by system | Keeps the extracted quantity; your override becomes effective |
| Rates and pricing | Owns every rate | Fills your pricing template from the quantities | — |
| Letter of offer, RFIs, exports | Approves | Drafts from the checked quantities | CSV / Excel / JSON export; CAD files from PDFs |
A three-phase workflow that keeps the estimator in charge
Phase 1 — understand the scope
Read the tender yourself first. Then use Claude to go faster: give it the specification sections and addenda and ask for the scope, exclusions and anything that conflicts. Ask Aginera, through Claude, which sheets exist for your trade — it classifies every sheet by trade and drawing type, so you see at once whether the set has a lighting plan, a panel schedule or a riser for the scope you are pricing.
Phase 2 — quantities from the drawings, not from the model
Ask Claude to list the takeoffs on the project. If one exists — including a takeoff you ran in the Aginera web app — Claude reads it for free. If not, Claude can start one on the drawing set (it asks first, because a takeoff uses credits). Either way the quantities come from Aginera: items grouped by category with their sheet, measured runs of conduit, feeders, cable tray, duct and pipe, and schedules as rows. Then use Claude for what it is good at — totalling by size or system, finding items on the plans that are missing from a schedule, and listing the lines you should check.
Phase 3 — review, price and write the offer
Review through Claude: accept, reject or override items (Aginera keeps the original extracted quantity next to your override). Export the checked scope to Excel or CSV for your pricing template. Rates are yours — have Claude fill the template from your rate library and flag any line it cannot price rather than inventing a number. Finally let Claude draft the RFIs and the letter of offer from the checked quantities.
Connect Aginera to Claude in two minutes
- 1
Add Aginera to Claude
In Claude open Settings → Connectors, search for Aginera and click Connect (or use the Add to Claude button on this page). Claude web, desktop, mobile and Claude Code are supported.
- 2
Sign in and choose your organization
Sign in to your Aginera account (free to create), pick the organization whose projects Claude may read, and approve the permissions. Delete permissions are off unless you tick them.
- 3
Ask about a project
Ask Claude something like "List the takeoffs on my Riverside project and total the conduit by size." Claude finds the project, reads the latest takeoff and answers with quantities and sheet references.
- 4
Review, then export
Accept, reject or adjust items through Claude ("reject the duplicate panel on E-201"), then ask for an Excel or CSV export of the checked scope for your pricing sheet.
Prompts that work
“List the takeoffs on my Riverside project and total the conduit by size.”
Reads an existing takeoff — free, nothing re-run.
“Which sheets have light fixtures that are not in the fixture schedule?”
Cross-checks takeoff items against the schedule rows.
“Take off the plumbing scope from the latest drawing set in Harbor Clinic.”
Runs a new takeoff (uses credits — Claude asks first).
“Summarise the panel schedules and their circuit counts.”
Schedules come back as rows Claude can reason over.
“Export the accepted mechanical items to Excel.”
A time-limited download link for your pricing template.
“Convert the floor plan PDF in Maple Street to DWG.”
PDF to CAD: DXF free, clean DWG $2 — Claude asks before paying.
PDF to CAD inside Claude
The same connector converts drawings. Ask Claude to convert a PDF and it returns a download link: the DXF of every sheet is free (with an aginera.ai watermark on free accounts) and a clean native AutoCAD DWG is $2 per drawing — Claude asks before paying and never completes a checkout for you. Vector PDFs convert line for line; scanned drawings are traced from the image. The same converter runs in the browser at aginera.ai/tools/pdf-to-cad.
Common mistakes to avoid
Asking Claude to read quantities off a PDF
A chat model looking at a drawing image will produce plausible numbers with nothing behind them. Use a takeoff tool for quantities and let Claude work on its output.
Letting it invent rates
Quantities can be measured; rates are your commercial judgement. Give Claude your rate library or template, and have it flag any line it cannot price instead of filling one in.
Skipping the review
Every Aginera item carries the sheet it came from. Spot-check the big lines — the largest runs, the equipment, anything Claude flags — before the numbers go into an offer.
Re-running takeoffs you already have
Ask Claude to list the existing takeoffs first. Reading one is free; running another uses credits.
What Claude can and cannot do with your account
Claude only sees the Aginera organization you pick when you connect, with the permissions you approve on the consent screen. It can read projects, drawings and takeoffs, start takeoffs, review items, export, and convert PDFs to CAD. Delete permissions are unticked by default. Anything that costs money is marked as billable, so Claude asks before it runs; payments by card always go through a checkout page you open yourself. You can disconnect at any time from Claude's connector settings.
Frequently asked questions
Can Claude do construction estimating?
Claude is good at the reasoning and paperwork around an estimate — reading specifications, summarising scope, cross-checking, drafting RFIs and letters of offer — but it should not measure quantities off drawings by itself. Connected to Aginera, Claude reads a takeoff Aginera produced from the drawings (items with sheet references, measured runs, schedules) instead of guessing. The estimator still owns scope, rates and the final price.
Is there a Claude connector for construction takeoff?
Yes. Aginera is published in the Claude Connectors Directory (https://claude.ai/directory/aginera). In Claude open Settings → Connectors, search for Aginera and click Connect. It gives Claude tools to list projects and takeoffs, read items, measured routes and schedules, run a new takeoff, review items, export to Excel, and convert PDF drawings to CAD.
Does Claude read my drawings directly?
No. Aginera reads the drawing set: it classifies each sheet by trade and drawing type, extracts items with the sheet they came from, measures routed runs such as conduit, duct and pipe, and reads schedules. Claude receives that structured takeoff and reasons over it, so every number can be traced back to a sheet.
Which trades does it cover?
Takeoffs run for electrical, mechanical / HVAC, plumbing, fire protection and process scope, or several trades at once. PDF to CAD works on any drawing — architectural, structural, MEP, civil or part drawings.
What does it cost?
Connecting Aginera to Claude is free, and reading your projects and existing takeoffs is free. Running a new takeoff uses your Aginera credits exactly as it would in the web app, and a clean DWG from a PDF is $2 per drawing (the watermarked DXF is free). Billable tools are marked so Claude asks before spending, and Claude never completes a payment for you.
Is my data safe?
Claude only sees the organization you choose when you connect, with the permissions you approve, and you can disconnect at any time. Your drawings stay in your Aginera account; see the privacy policy at aginera.ai/privacy.
Does it work with ChatGPT or other AI agents?
Yes. The same connector is a remote MCP server (https://mcp.aginera.ai/mcp) with OAuth sign-in, so it works as a custom connector in ChatGPT, GitHub Copilot and other MCP clients. Developer details are at aginera.ai/agents.
Give Claude your drawings — not a guess
Free to connect. Reading your takeoffs is free; new takeoffs and a clean DWG use credits, and Claude asks first.