AI quantity take-off · Nigeria
Drawings in.
Bill of quantities out.
Tubali turns photographed house drawings into a measured, priced bill of quantities at local market rates. Built for quantity surveyors and contractors, with a material list self-builders can actually buy from.
The problem
Most homes are built in stages, without a quantity surveyor
of new homes in Nigeria are funded from personal savings and built incrementally, stage by stage. Association of Housing Corporations of Nigeria, reported by BusinessDay
Self-builders guess
Owners buy blocks, cement and rods on a builder's word, with no measured quantities and no total in sight.
Take-off is slow
A QS measures by hand on dimension paper. A full bungalow BOQ takes days, so most small jobs never get one.
Prices move monthly
Cement roughly doubled between 2024 and 2026. An estimate priced six months ago is already wrong.
How it works
From photographed drawings to a priced BOQ in minutes
AI reads the drawings. A rules engine measures. A local rate library prices. The quantity surveyor reviews and signs.
Snap
Plans, elevations and sections. Paper, PDF or DWG.
Check
Scale read, sheets found, missing details flagged.
Measure
Take-off by standard rules, every line traceable.
Price
Composite rates from a dated city library.
Buy
Material schedule and quotes from local stores.
Vision model reads
Finds scale, dimension strings, wall runs, openings and symbols on photos or PDFs.
Rules engine measures
Deterministic take-off with mix constants and wastage. Same drawing, same answer.
Rate library prices
City rates from market surveys and store quotes, each with its date and source.
The product
Built for people who issue BOQs for a living
Drawing check
It tells you what it can't see
A floor plan alone can't give foundation depth or reinforcement. Tubali doesn't hide that. It shows which sheets it read and which are missing.
- Scale read from dimension strings
- Wall centrelines by thickness, doors and windows by type
- Assumed values shown in amber until the QS confirms them
Bill of quantities
A BOQ a quantity surveyor would issue
Elemental bills from preliminaries to external works, in standard units, with composite rates and the totals below the line.
- Substructure, frame, walls, roof, doors and windows, finishes, M&E, external works
- Rates include materials, labour and overheads and profit
- Contingency, VAT and stated exclusions
- Export to Excel and PDF
For self-builders
The same BOQ becomes a shopping list
Quantities in the units people actually buy: bags, pieces, 12 m lengths and tipper trips. Send the list to nearby hardware stores for quotes.
- Cement, blocks, rods, sand, granite, roofing, timber, tiles
- Re-priced when market rates move
- One tap to request store quotes
Professional control
Tubali drafts. The QS signs.
Every assumed item is listed with its value. Confirm it or edit the spec before the bill is issued. Nothing assumed is hidden.
QS workspace
Every number opens to its working
On desktop, select any item to see its dimension lines, the drawing it came from and its rate build-up.
Take-off lines
Length × width × depth for each run, as on dimension paper.
Rate build-up
Materials, labour, plant, overheads and profit.
General summary
Bills to contract sum, with exclusions stated.
Worked example
A 150 m² three-bedroom bungalow at Kano rates
A full take-off, not a per-square-metre guess: 59 items across nine bills.
11 assumed items worth ₦7.86m are flagged for the QS to confirm before issue.
Sample estimate, standard finish. Material prices from October 2026 market surveys; labour and fittings rates are working assumptions being validated with pilot firms. Excludes land, approvals, fence, borehole, power connection and professional fees.
Why professionals can trust it
Auditable from drawing to contract sum
Traceable
Every quantity links to its dimension lines and the drawing it came from.
Flagged
Anything assumed is marked and must be confirmed before issue.
Dated rates
Each rate shows its city, month and source, with QS overrides.
Revisions
Rev A, Rev B, with changes tracked for the client.
Pricing
Three customers, one BOQ
Introductory pricing for the pilot period.
QS firms & contractors
₦25,000 / seat / month
Unlimited projects, Excel and PDF issue, your own rate overrides, revisions.
Self-builders
₦15,000 / estimate
Full material schedule by stage, re-priced when market rates move.
Hardware stores
₦20,000 / month
Receive quote requests built from real material lists, not walk-in guesses.
Roadmap
Starting with professionals in one city
NOW · PILOT, H1 2027
Kano
Five QS firms run Tubali beside their manual BOQs. Target: quantities within 5% of their own.
NEXT · Q3 2027
Abuja, Kaduna
NIQS chapter partnerships, city rate libraries and the first hardware stores on quote requests.
LATER · 2028
Lagos and beyond
Southern cities, then West African markets, with DWG and storey-building support.
Join the Kano pilot
We're working with quantity surveying firms, contractors and hardware stores to test Tubali against real projects. Send us a drawing and we'll run it side by side with your own BOQ.
Team
CONCEPT-STUDIOS LTD
Sadiq Bello
CEO
Product, QS firm partnerships and the hardware store network.
Ibrahim Adam
Lead developer
Drawing reader, measurement engine, and the mobile and desktop apps.
QS advisory panel
Registered quantity surveyors (MNIQS)
Practitioners from the pilot firms validate every measurement rule and rate.