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AI Cost Intelligence Platform for Construction Finance

A UK-based construction industry founder needed to replace decades of fragmented, spreadsheet-based cost management with a single, enterprise-grade AI platform designed to earn the trust of CFOs and board-level stakeholders. The development team delivered an interactive AI-powered prototype in two weeks and a fully functional MVP in three months, across 500 hours of focused development, with zero rework and no scope collapse.

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The company and product

AI Cost Intelligence for Construction Finance

The client is a founder launching their first custom software product: a high-ambition, AI-powered cost-intelligence platform designed for large construction enterprises. Mission-critical software operates in a highly specialized, fragmented industry where workflows resist standardization and financial trust is non-negotiable.

Decades of accumulated operational knowledge had been trapped across spreadsheets, legacy tools, and siloed, stage-specific software that covered the full project lifecycle, with no unified system in place.

The engagement was initiated to codify that institutional expertise into a structured, scalable platform managing construction project finances end-to-end. From initial cost planning through final account settlement, without undermining the financial confidence of senior stakeholders who depend on it.

KEY CHALLENGES OF THE PROJECT

Five Challenges That Couldn't Be Solved Off the Shelf

The client faced five core technical and commercial challenges that required a purpose-built solution rather than an adaptation of existing enterprise tools.

  • Translating institutional knowledge into software logic

    Decades of experience-based commercial expertise existed only in spreadsheets, legacy systems, and the minds of long-tenured staff. Capturing that knowledge in a structured, queryable platform without losing its nuance was the foundational challenge.

  • AI integration in a high-trust environment

    Introducing AI into construction finance carried significant risk. Distorted outputs from incomplete or poorly structured data could undermine executive confidence entirely. The product was being evaluated by CFOs and Chairmen who had seen overpromised enterprise AI fail before.

  • Balancing simplicity with commercial depth

    The platform needed to be intuitive enough for everyday project users, while supporting the full complexity of cost planning, RFQ generation, purchase order workflows, and approval structures without falling into the over-engineered trap of incumbent tools.

  • End-to-end procurement and finance integration

    The solution required seamless integration with clients' existing finance platforms, not all of which were designed with flexible or intuitive APIs, to eliminate manual reconciliation and duplicate data entry.

  • First-time founder scope management

    With no prior custom software experience, the founder's ambitions had not yet been tested against real-world software constraints. Delivering within scope, on budget, and without reset required a structured delivery approach from day one.

OUR APPROACH

Delivery Process Built Around De-Risking

The project was delivered in three structured phases, designed to replace assumptions with evidence before a single line of production code was written.

Discovery & Architecture

The engagement began with framework-driven, hypothesis-first workshops designed to surface decades of operational knowledge and translate it into an actionable product specification. Each hypothesis was converted into a prototype feature; each prototype became a proof point. This phase established the architectural foundation and de-risked the scope before development began.

Design & Prototyping

Deep business analytics workshops replaced assumptions with evidence. Weekly iterations and trade-off discussions kept the vision grounded without shrinking it. The discovery phase was designed to feel like momentum. Prototypes were used to validate the product's complexity and to give both the founder and future stakeholders confidence in the product's scope and commercial logic.

Build

Advanced AI features were included in the first deployment. AI-assisted development accelerated iteration cycles throughout. The result was a fully functional product, ready for pilot, with comprehensive documentation, delivered without rework, resets, or scope collapse.

Strategic restraint during pilot preparation

The team identified that the founder's first prospective client was not fully utilizing its existing financial accounting software. The data inputs needed to power the AI layer were incomplete and inconsistently structured. Rather than proceed and risk producing misleading outputs, the team paused the AI rollout to protect the platform's long-term credibility and maintain board-level trust throughout the pilot period.

Collaboration model

The team maintained close alignment with the founder throughout the delivery process, translating a non-technical, industry-specific vision into a clear product structure and user experience. The founder confirmed the team's key strength was exactly this: the ability to make a complex domain legible to a software delivery process.

application functionalities

  • ArchQ screen 1
  • ArchQ screen 2
  • ArchQ screen 3

TECHNOLOGIES WE USED

LayerTechnologies
FrontendNext.js 15.4.8 (App Router), React 19, TypeScript 5, Tailwind CSS v4, Radix UI (via Shadcn UI), React Hook Form, Recharts (data visualization)
BackendVercel AI SDK v5.0.81 (AI orchestration), Next.js API routes (serverless functions), Supabase (PostgreSQL 15 + RLS), Zod v4.1.1 (runtime validation)
DatabaseSupabase (PostgreSQL 15, Row-Level Security), Private Supabase Storage for file uploads, JSONB for AI metadata storage
Cloud & DevOpsVercel (hosting, CI/CD), GitHub Actions (deployment pipeline), Supabase CLI (local dev + migrations)
AI / MLOpenAI GPT-4o-mini (primary model), Vercel AI SDK
SecuritySupabase Auth (JWT + refresh tokens), Row-Level Security (RLS) policies, JWT-based RBAC (super_admin/admin/manager/qs), Private storage buckets, Server-only API keys, Organisation-scoped multi-tenancy

THE RESULTS

From Prototype to Board-Approved MVP in 3 Months

Following a three-month development cycle, the project team delivered measurable outcomes:


  • An interactive, AI-powered prototype was delivered two weeks after project kick-off.

  • A fully functional MVP was delivered in three months, within a 500-hour development budget.

  • Zero rework was required following delivery, no reset, no scope collapse.

  • The platform successfully passed the initial pilot review at the CFO and board levels without disrupting existing financial workflows.

  • The founder confirmed full confidence in the product's underlying logic, citing the team's ability to capture and codify complex industry knowledge as a core delivery outcome.

CLIENT’S TESTIMONIAL

KEY TAKEAWAYS

How to Build AI in High-Trust Environments

  • Readiness matters more than speed

    Pausing the AI rollout during pilot preparation because the underlying data was incomplete protected the platform's credibility with the CFO and board-level stakeholders. The short-term delay prevented the kind of false signal that could have permanently discredited the system.

  • Legacy data is an asset, not a liability

    Two decades of fragmented costing data, once structured and extracted, became the training foundation for the platform's ML layer. Treating historical knowledge as a future input for intelligence changes the economics of AI adoption in established industries.

  • Prototype before production eliminates rework at scale

    Replacing assumptions with evidence during discovery before a line of production code was written, delivered a first-attempt prototype that required no rework. For first-time software founders, this approach is the difference between clarity of scope and scope collapse.

  • Sustainable simplicity for disciplined design

    The platform had to serve everyday project users and CFO-level stakeholders simultaneously. Achieving that without over-engineering required sustained trade-off discipline throughout every sprint, not a one-time architectural decision.

THE DEVELOPMENT TEAM

About the Development Team

Monterail assembled a cross-functional team purpose-built for the challenge. Our business analysts mapped the domain, designers shaped the user experience, and frontend and backend developers brought it to life. The AI development team unlocked intelligent capabilities, while QA and project management kept quality and delivery on track. A complete team, from first insight to final release.

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Grzegorz Hajdukiewicz | Chief Delivery Officer

Want to build AI for high-stakes decisions? We partner with companies to design, build, and scale digital products that solve real-world challenges just like we did in this case.

Grzegorz Hajdukiewicz | Chief Delivery Officer

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