Harmby Homespace: moving from spreadsheets to a centralized quote and supplier invoice platform

Harmby Homespace is a Yorkshire-based building business delivering residential and commercial projects, from new builds and barn conversions to renovations, kitchens, bathrooms, and landscaping.

The team previously relied on Excel spreadsheets to manage supplier invoices and create customer quotes. As project volume increased, spreadsheet workflows became difficult to control, validate, and scale.

To solve this, the business implemented HarmbyHomespace, a centralized .NET 6 web application with structured data models, role-based access, and integrated financial workflows.

What Harmby Homespace Does

A broad construction service offering created complex quoting and supplier management needs.

Core service lines

Harmby Homespace delivers a wide range of building and improvement projects across Yorkshire, with a focus on quality workmanship, practical design input, and end-to-end delivery from planning through completion.

  • New builds
  • Barn conversions
  • Property renovations
  • Loft, basement, and garage conversions
  • Commercial developments
  • Bathrooms, wet rooms, and tiling
  • Kitchen redesign and installation
  • Landscaping, patios, paths, and driveways

The Challenge

Spreadsheet-driven operations were slowing delivery and increasing risk.

Operational pain points before the platform launch

  • Duplicate and inconsistent data entry across files
  • Weak validation and missing supplier, project, or company links
  • Limited visibility of invoice status, including outstanding, paid, part-paid, and credit
  • Manual recalculation of totals, VAT, and markup
  • Difficult collaboration and weak auditability
  • Slow reporting and manual customer quote distribution

The Solution

A centralized .NET 6 platform replaced disconnected files and manual workflows.

Core capabilities delivered

1. Supplier invoice management

A structured SupplierInvoice model replaced ad-hoc spreadsheets with supplier and project linkage, invoice and due dates, paid tracking, and full financial breakdown fields for net, VAT, CIS, gross, and rounding adjustments.

The interface included searchable and filterable grids, validation rules, lifecycle statuses, and master-detail handling for part payments.

Xero synchronization status tracking was also built in to strengthen accounting handoff.

2. Quote creation and costing

A dedicated Quotation module replaced manual quote worksheets with itemized quote lines and structured cost categories such as labour, materials, hire, and extra work.

Markup controls by cost type, VAT handling, gross value calculation, and quote lifecycle statuses provided consistency and reduced arithmetic risk.

3. Reporting and customer communication

Integrated reporting pages produced both summary and detailed quote outputs with standardized formatting for customer-facing documents.

An in-app email workflow enabled faster quote delivery without switching tools.

4. Accounting integration support

The new HarmbyHomespace app was seamlessly integrated with Xero, including support for MTD workflows and VAT submission processes.

Xero contact synchronization reduced manual data transfer and improved consistency between operational and finance data.

Business Impact

The move from spreadsheets to a centralized platform delivered measurable operational gains.

Outcomes achieved

  • Improved data quality through required fields and validation
  • Faster processing with less manual spreadsheet manipulation
  • Better financial visibility through real-time searching and filtering
  • Stronger control via standardized statuses and structured workflows
  • Smoother compliance and finance operations through Xero integration for MTD and VAT submissions
  • Reduced admin overhead through integrated reporting and email actions
  • A scalable foundation for growth without multiplying spreadsheet complexity

Harmby Homespace modernized a critical business process by centralizing supplier invoices, quote creation, and reporting in a structured .NET platform, improving control, accuracy, and scalability.

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