Your next tender is already written.
SpecBase turns your practice's past NBS specifications into a working library. Pick the sections a project needs, fill each clause from tenders you've already issued, and export a clean, structured PDF. No AI writes your specs — your own words, with an on-device assistant that catches a slip before you issue.
Free during the pilot · No NBS licence required · Your specifications stay private
Manufacturer: contractor's choice, subject to approval.
Preparation: fill, rub down and spot-prime bare areas.
Primer/sealer: as recommended for the substrate.
Finish: two full coats matt emulsion
The knowledge is already in your office — locked inside finished PDFs. So every new job, the specification gets rebuilt almost from scratch.
Re-typed every time
Without a reusable library, each tender is assembled by hand from old documents — slow, inconsistent, and easy to get wrong under deadline.
Priced for big firms
A full specification platform carries an annual licence that's hard to justify for a practice that tenders a handful of projects a year.
AI you can't stand behind
Generated clauses have to be vetted line by line — and explained to a client or insurer. That's risk, not a shortcut.
Three steps from blank page to issued tender.
It follows the way you already structure a specification, so the output is familiar the moment it lands.
Pick your sections
Start from a project-type preset or search the full NBS list. SpecBase flags the sections a job like yours usually needs.
Fill from past work
Every clause comes pre-filled with the most complete version from your firm's previous tenders. Accept it, edit it, or swap in another.
Export a tender
A clean, NBS-structured PDF — contents, section notes, the lot. Save the draft and pick it back up exactly where you left off.
Your material. Your standards. No AI guessing.
SpecBase doesn't write specifications for you. It finds the clauses your practice has already issued — and stood behind — and lets you reuse them. There's nothing generated to second-guess, nothing to caveat to a client, and nothing new to explain to your insurer. The one bit of AI on board never invents a clause: it runs on your own device and only flags a possible slip in the text you wrote, so the call stays yours. The output reads like your firm because it is your firm.
Defensible by default
Every clause traces back to a real tender you issued. No invented text to vet.
Consistent across jobs
Your house standard travels from project to project instead of drifting each time.
Yours, kept private
Your past tenders stay in your own library — never pooled, never used to train anything.
Built for the way small practices actually work.
Project-type presets
Residential renovation, larger heritage refurb, civic build — start from a sensible set of sections and refine, instead of a blank catalogue.
The most complete version, first
When a clause appears across several past tenders, SpecBase suggests the fullest one — and keeps the alternatives one click away.
Drafts you can resume
A draft is a whole tender — sections, clauses and your edits — saved and restored exactly. Stop mid-job, come back next week, carry on.
Versioned exports
Every export is kept with a snapshot of the project, so past tenders stay faithful even after the job moves on. Compare any two revisions side by side, with a word-level diff of what changed.
Work on it together
Two of you can share one tender. Every clause shows who edited it last, with a colour-coded word-level diff of their change, and each saved version lists everyone who contributed — so nothing changes without a trail.
Issue a final you can send
When the tender's ready, issue a clean final PDF for the client or contractor — no internal version numbers or revision pages, and locked so it can't be quietly edited in a standard reader. Every issue is logged in the project's history.
We charge per practice, not per chair.
One flat annual price for your whole practice — unlimited users, every feature. No per-seat tax, no licence sitting idle between projects.
Free for selected practices
We're running a small private pilot. If you tender your own projects, you can use SpecBase on a real job at no cost while we shape it with you.
- Set up with your own past tenders
- A private, managed instance
- We reply to you personally
After the pilot — flat annual, per practice
Solo & micro practice · 1–3 people
- Unlimited users
- Every feature, your own library
- About a quarter of one NBS seat
Small–mid firm · 4–15 people
- Everything in Studio
- For a whole tendering team
- NBS would bill per head
Larger / multi-office · 16+ people
- Everything in Practice
- Multi-office, unlimited users
- Still under one current NBS seat
One NBS seat costs more than your whole team on SpecBase. NBS Chorus is sold per seat and has reportedly risen around 111% over five years — one architect was quoted £7,350 for a licence that cost £1,385 in 2015.
The things practices ask first.
Does SpecBase use AI to write our specs?
Where does our tender data live?
Do we need an NBS licence to use it?
What does it cost after the pilot?
How does it learn our material in the first place?
What size of project does it suit?
Try it on a real tender.
Tell us a little about your practice. If you tender your own projects and want to spend less time rebuilding specs, we'd like to put SpecBase in front of you.
- We set it up with a few of your past tenders.
- You build your next tender on it, for real.
- No commitment, and your work stays yours.