Disjointed spreadsheets, change orders that get lost in email, jobs that quietly slip past budget before anyone notices. If you run a UK construction firm on manual processes or generic software, you know the pattern. Off-the-shelf construction project management software often makes it worse, because you end up bending your business around the tool’s approval flows and cost code structure instead of the other way round.
ByteGears builds custom construction project management software for UK contractors. No per-user pricing, no rigid templates. We’re a London-based development consultancy, and we build systems that fit how you already work, connect to your accounting properly, and treat CDM, CIS and VAT as core requirements rather than afterthoughts.
Where off-the-shelf construction software falls short
Around 70% of UK construction firms now run some form of digital project management software, so the question is rarely whether to digitise. It’s whether the tool you picked actually fits. Generic platforms tend to disappoint for a few specific reasons:
- Per-user pricing punishes you for growing. Platforms priced at £30 to £80 per user per month look fine for a small office team. With 50 to 100 field workers, the bill runs to thousands a month. Most firms respond by denying site staff logins, which defeats the point.
- Approval flows are linear when your business isn’t. Most SaaS tools enforce a single approval chain. They struggle with conditional rules like “over £10k needs the commercial lead, over £50k needs a director” or parallel reviews. Change orders get stuck in the wrong queue, and people fall back to email and spreadsheets.
- Accounting integration is shallow. A read-only feed into Xero or Sage still leaves finance reconciling payables, GL postings and retainage by hand. Subcontractor names don’t match, change orders don’t flow through to invoices, and month-end close drags on for days.
- UK compliance is an afterthought. Many platforms are built for the US or global market. CIS deduction logic isn’t configurable, VAT invoices don’t match the HMRC format, and there are no CDM templates. Finance ends up maintaining manual spreadsheets alongside the software.
- The mobile app is the weakest part. Slow, battery-hungry, poor offline behaviour. Site teams revert to paper and photos, and the same data gets entered twice.
- The renewal trap. Annual increases of 10 to 15% are common, multi-year lock-ins are standard, and export costs can be steep. Once you’re in, your pain points stop being the vendor’s priority.
The result is workarounds, slower work, and a team that resents the tool. Plenty of UK firms pay for features they never touch while still missing the ones that would actually help.
When SaaS is genuinely the right call
We won’t talk you into a custom build you don’t need. Off-the-shelf software is the sensible choice for a single-trade contractor with predictable workflows, a residential builder with simple change-order processes, or a field team that only needs task and communication tools. If your accounting is standard, your approvals are straightforward, and your projects are modest in value, a good SaaS subscription will serve you well.
A bespoke build earns its place when the standard tools start costing you more than they save. That’s usually the case when you have multi-tiered or conditional sign-offs, non-standard cost allocation, deep integration needs with legacy estimating systems, bespoke client reporting, or a headcount large enough that per-seat licensing has become a real line item. It’s also the right call when UK compliance gaps are forcing manual work, or a previous platform rollout failed and adoption never recovered.
What you get with a custom build from ByteGears
Built around your process
We map your existing workflows, cost code structure and approval logic before anyone writes code, so the software supports how you work rather than rerouting it. Conditional approvals, matrix sign-offs and unusual cost allocation are design decisions, not workarounds.
A system you own
You own the code and the data outright. No per-user fees, no per-project charges, no renewal increases. As you take on more staff and more projects, the cost doesn’t climb with you.
Accounting integration that actually closes the loop
We build proper two-way sync with Xero, Sage or QuickBooks: job costs, change orders, retainage and CIS deductions posting against your real cost codes. No per-API-call charges, no manual reconciliation.
UK compliance from the start
CDM 2015 audit trails, CIS subcontractor verification and deduction logic, and HMRC-format VAT invoicing are built in from day one, not bolted on later.
A mobile app site teams will actually use
Designed for real site conditions: works offline and syncs when connectivity returns, readable in bright sun, usable with gloves on. Daily logs, photos and task updates captured once, on site.
Local support, no timezone gap
Our London team handles implementation and ongoing maintenance. When something needs fixing, you talk to the people who built it.
Features we typically build
A first release covers the core, then the system grows by phase as your needs become clear:
- Role-based dashboards: separate live views for project managers, finance and site teams, with the metrics each role cares about.
- Scheduling: Gantt views, task assignment to crews, dependencies, milestones and critical path.
- Cost tracking: budgets by cost code, actuals for labour, materials and subcontractors, live budget-versus-actual.
- Document management: drawings, specs, permits and certificates with version control and document-to-activity linking.
- RFIs and submittals: creation, routing, response tracking, and cost or schedule impact captured.
- Change order management: a proper lifecycle from creation through impact analysis and approval, with budget and schedule updated automatically.
- Client invoicing: billing tied to cost codes and progress, with retainage handled correctly.
- Mobile field access: daily logs, photo capture, punch lists and safety checklists, offline-capable.
- Subcontractor portal: controlled external access, with insurance expiry and certification tracked.
- Compliance reporting: CIS returns, VAT splits and CDM documentation status without manual assembly.
- Resource scheduling: allocate equipment, materials and people without clashes.
- BIM integration: optional Revit add-in or IFC import where your work is design-led.
Underneath, the system tracks the entities a construction business actually runs on: projects, phases, activities, cost codes, budgets, purchase orders, subcontractors, client and vendor invoices, change orders, RFIs, daily reports, punch lists, and incident records. Getting that data model right is what makes reporting trustworthy later.
How the project runs
We work in phases, starting with a focused first release rather than a big-bang launch.
1. Discovery and planning (2 to 3 weeks)
We interview your project, finance and site teams to document how things currently work, where they break down, and what your cost codes and approval chains really look like.
2. First release (8 to 12 weeks)
A working system covering dashboards, scheduling, cost tracking, document management, a mobile app for daily logs, and one accounting integration. Our UK developers build with frameworks like .NET Core and React.
3. Data migration and go-live (2 to 4 weeks)
Legacy data needs care: cost codes, subcontractor records and project history rarely map cleanly between systems, and spreadsheets need normalising before import. We plan this properly, validate it, and run the old and new systems in parallel briefly so discrepancies surface before you commit.
4. Later phases and support (ongoing)
Financial billing, RFIs, change orders, advanced mobile features and compliance automation follow once the core is bedded in. Roughly half of construction software rollouts slip their timeline, usually because of scope creep or thin data migration planning. Phasing the work is how we keep that from happening to you.
What it costs
A custom build costs more upfront than a SaaS subscription. Over the life of the system, the maths usually favours owning it.
As a rough guide: a focused first release typically falls in the £30k to £60k range; a system extended with financial management, RFIs and advanced mobile sits around £60k to £120k; a full-featured build with BIM, compliance automation and portfolio analytics runs higher. The exact figure depends on integration complexity, compliance depth and scope, and we give you a real estimate once we understand the work.
Set that against the true cost of SaaS. The subscription is only part of it. Onboarding fees, training charges, add-on modules, per-API-call limits, storage overages, payment processing percentages and 10 to 15% renewal increases all stack up. Over five years a mid-market subscription often reaches the tens of thousands, and an enterprise platform considerably more, with no asset to show for it at the end. A bespoke system is capital you own, with running costs limited to hosting and support, and no vendor holding your data as leverage at renewal.
You also keep full control. No lock-in, no export fee, and the freedom to change or extend the system whenever your business does.
Sectors we work with
The approach adapts across UK construction:
- Residential developers: change orders, selections, client portals and warranty tracking for custom builds.
- Commercial contractors: multi-site timelines, material cost tracking and RFI coordination.
- Civil engineering: precedence scheduling, labour tracking and environmental compliance logging for infrastructure work.
- Heritage restoration: document-heavy workflows and inspection records for listed buildings.
- MEP contractors: service orders, technician time tracking with geolocation, and parts inventory tied to cost.
- Specialist trades: weather-driven scheduling, material and waste tracking, and safety certification for roofing, painting and insulation work.
- Design-build firms: BIM collaboration with cost and schedule integration, and multi-party approval chains.
- Real estate developers: portfolio dashboards, multi-project resource allocation and investor reporting.
- Modular builders: factory-to-site logistics.
- Demolition specialists: waste tracking and environmental compliance.
Common Questions About Custom Construction Project Management Software
How does a custom build cost compare to Procore or Buildertrend?
A custom build is a larger upfront cost, but it replaces a recurring bill that never stops and tends to rise 10 to 15% at renewal. SaaS also adds charges most buyers miss at first: onboarding fees, per-API-call limits, add-on modules, payment processing, and storage overages. Over five years, a mid-market SaaS subscription often runs into the tens of thousands and an enterprise platform far higher. A bespoke system is an asset you own, with running costs limited to hosting and support. We give you a real estimate once we have scoped the work, rather than a number pulled from a price list.
What's the typical development timeline?
A focused first release usually takes 8 to 12 weeks: project dashboards, scheduling, cost tracking, document management, a mobile app for daily logs, and one accounting integration. Financial billing, RFIs, change orders and advanced mobile features tend to follow in a second phase over the next few months. We deliver something working early so your team can react to it rather than waiting six months for a big-bang launch.
How do you handle updates and changes?
Every project includes 12 months of support and updates as standard. After that you can take an ongoing maintenance package or handle changes internally using the documentation we hand over. Because you own the code, the roadmap follows your priorities, not a vendor's release schedule, and feature requests get addressed in days rather than quarters.
Can you integrate with our accounting and existing systems?
Yes. Accounting integration is usually the most valuable connection, so we build proper two-way sync with Xero, Sage or QuickBooks: job costs, change orders, retainage and CIS deductions posting against your real cost codes rather than a read-only feed. We also connect supplier portals, cloud storage like SharePoint or OneDrive, and legacy estimating tools through custom API work, with no per-call charges.
Do you handle CDM, CIS and VAT compliance?
Yes, and we treat them as core requirements rather than add-ons. That means CIS subcontractor verification and deduction logic, VAT invoicing in the format HMRC expects, and CDM audit trails covering pre-construction information, method statements, risk assessments and the Health and Safety File. We also build role-based access and the retention rules construction records need, including the H&S File kept for the life of the building.
Where is our data hosted, and do we own it?
You own the system, the code and the data outright. We can host in the UK where data residency matters, particularly for public-sector frameworks, and offer on-premise or hybrid deployment for firms with strict governance. There is no vendor lock-in and no export fee if you ever want to move.
Do you provide training for our team?
Yes. We train by role, because a site manager and a finance lead need different things: short sessions on daily logs, photos and punch lists for field teams, and longer sessions on cost tracking and reporting for the office. You get written manuals and video walkthroughs tailored to each role.