Small UK building firms — extensions, refurbs, loft conversions — CDM 2015 aware, snagging tracked, payments on schedule.
01 · Quoting + estimate
Estimate built from the take-off, not the gut.
Quantity-based estimates with materials, labour, prelims and contingency — defensible at the kitchen table, profitable on day 30. HBXL Estimator-friendly.
Take-off-driven estimate
Materials & labour split
Prelims & contingency
HBXL Estimator
02 · Project schedule + Gantt
Schedule the trades read on the phone.
Gantt for the office, daily card for the site. Subbies booked, materials called off, dependencies tracked — without a project manager.
Gantt for the office
Daily card for the site
Material call-off triggers
Buildxact, Tradify
03 · CDM compliance
Construction Phase Plan — generated, not assembled.
CDM 2015 documentation built from the project record — Construction Phase Plan, F10 notification, RAMS per task. The HSE inspection nobody enjoys becomes a download.
Construction Phase Plan
F10 notification
RAMS per task
HBXL CDM-Wizard
04 · Snagging + handover
Punch list closed, handover signed.
Snags captured on the phone with photos, assigned to a trade, closed with proof. Handover pack generated from the punch list. The retention payment isn't held up.
Photo-based snag capture
Trade assignment & SLA
Handover pack generator
Retention release tracking
05 · Subcontractor mgmt
Subbies on the system, paid on schedule.
Subcontractor onboarding (CIS, insurance, RAMS), purchase orders, application-for-payment workflow, retention tracked — without the Friday-night spreadsheet.
CIS & insurance check
Application-for-payment
Purchase orders
Retention tracking
06 · BrainBase
One brain on every site.
Drawings, specs, supplier list, RAMS, regs reference — searchable from a phone on site. Site managers find the right detail in seconds, not the wrong one in twenty minutes.
Drawing & spec library
Supplier & subbie catalogue
RAMS & regs reference
Site-manager training stack
Sample engagement
The fourteen-staff builder that cut snagging closure from 3 weeks to 4 days.
Fourteen staff. Six concurrent projects. Snagging punch-lists tracked on a clipboard and a WhatsApp group.
A residential refurb + extensions builder kept snagging on a paper punch list, chased trades on WhatsApp, and held up retention payments waiting for sign-off. Three-week build: photo-based snag capture, trade assignment with SLA, handover pack generator, retention release tied to punch-list closure. Six months in: average punch-list closure from 3 weeks to 4 days, retention released on schedule across the next six handovers.
How we measure: Punch-list closure measured as snag-raised timestamp to snag-signed-off timestamp, weighted across 312 snags post-build vs the operator's clipboard sample from the prior six handovers.
−17 dayspunch-list closure, average
6 / 6retentions released on schedule
+£42kretention cashflow recovered, yr one
Builds for trades & services
Use cases that fit.
Each is a tightly-scoped build, fixed price, owned by you.