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Odoo Custom Development London

Bespoke Python modules that extend standard Odoo to fit your exact process, data model and compliance needs. Softomate delivers custom Odoo modules with industry-specific workflows, REST API integrations to Salesforce, Stripe and HMRC Making Tax Digital, and optional AI automation on top.

A focused single-module build starts from £3,500 excluding VAT, with UK GDPR controls designed in from discovery. The scoping call is free for UK businesses evaluating what custom development can unlock beyond standard configuration.

  • From £3,500 excluding VAT
  • Free discovery workshop
  • Two-week build sprints

Benefits and fit

What should custom Odoo development change for your business?

Odoo custom development is the design, build and deployment of bespoke Python modules that extend Odoo with functionality that standard modules and Odoo Studio configuration cannot provide. Custom modules integrate natively into the Odoo framework, appear in the standard UI and are accessible through the Odoo REST API.

Bespoke to your exact business process

A custom module is designed around your data model, approval chain, compliance rules and operational steps. Custom Python also removes the fixed boundaries of standard modules: new data relationships, computed fields that draw on several modules, and workflows that cross CRM, accounting and inventory in a sequence the standard automated action engine cannot express.

REST API integrations with third-party systems

Custom modules expose and consume data through the Odoo JSON-RPC and REST API, so Salesforce, Stripe, HMRC MTD, Companies House, HubSpot, Shopify and any other system with an API can connect without manual export-import. Webhook listeners update Odoo records in real time when events occur in the external system.

UK GDPR controls designed in from discovery

Lawful basis mapping, field-level access controls, automated data retention rules and subject access request deletion pathways are part of the functional specification before development begins. ICO-aligned documentation is delivered with the project, and FCA-regulated and SRA-regulated London businesses get sector-specific controls on the data model and permissions.

AI augmentation within the module

Machine learning layers can process the data flowing through the module: lead scoring on CRM opportunities, document AI for PDF invoices, demand forecasting for reorder rules and email classification. AI is added as a modular layer that can be enabled or disabled without affecting the core custom module.

Before you commit

Is custom Odoo development the right starting point?

A good fit

Your core operational workflows are too specific for standard Odoo configuration, you need to integrate Odoo with systems the existing connectors do not cover, or you need data models, business logic or UI components that behave like native Odoo features.

A smaller change may be enough

If Odoo Studio, automated actions and approval rules can cover the requirement, configuration is enough. Softomate scopes each project during discovery to recommend the minimum level of customisation, avoiding unnecessary custom code where configuration suffices.

What we deliver

What does a custom Odoo development project include?

Expand an area to see what is built. Every module is version-locked to your Odoo release, follows Odoo security best practices for access rights and is delivered with a functional specification, test cases and an upgrade path assessment for the next Odoo major version.

Custom Python module development

Bespoke modules are built in Python using the Odoo ORM, framework conventions and the OWL JavaScript UI framework, for London businesses that need functionality the standard catalogue cannot provide.

Modules extend Odoo with new data models, computed fields, business logic constraints, server actions, automated rules, custom views, kanban boards and dashboard widgets that integrate natively with standard modules.

The result looks, behaves and performs like any standard Odoo module but is built around your specific process.

Odoo REST API integration development

REST API and webhook integration layers connect custom Odoo modules to Salesforce, Stripe, HubSpot, HMRC Making Tax Digital, Companies House, Shopify, WooCommerce, DHL, Royal Mail and any other third-party system with an API.

Inbound webhook listeners create or update Odoo records in real time when events occur in the external system. Outbound REST calls push Odoo data to external systems on trigger conditions defined in the module business logic.

API credentials are stored in Odoo system parameters with encryption. Retry logic and dead-letter queue monitoring are built into every integration to prevent data loss on temporary API failures.

Odoo and AI automation layer

AI-augmented automation inside your ERP workflows. Document AI processes PDF vendor invoices attached to custom purchase records, extracts line items, VAT amounts and supplier references, and populates Odoo vendor bill fields automatically.

NLP email classification creates Odoo tickets, leads or tasks with the correct category, priority and assignment. Lead scoring models trained on historical CRM data score new opportunities, and demand forecasting feeds custom inventory reorder rules.

Each AI layer is a modular add-on that can be enabled, updated or replaced independently. For automation beyond Odoo, across email, scheduling and other back-office systems, this pairs with our AI automation services for London businesses.

Custom reporting modules and dashboards

Standard Odoo reporting covers the data models in standard modules but cannot report across custom data models without additional development. Custom reporting modules extend the Odoo QWeb reporting engine with new report templates, export formats and scheduled email delivery.

Custom dashboards use the OWL JavaScript framework to visualise module data in kanban views, pivot tables, bar charts, line charts and KPI widgets inside the native Odoo interface.

Management reporting packs are delivered as scheduled PDF or XLSX reports, emailed to defined recipients daily, weekly or monthly, configured within the module settings.

Odoo module migration and version upgrade

Custom modules built for earlier major versions need migration work when you upgrade Odoo, because the ORM API, security rules and JavaScript framework change between major versions.

Softomate migrates custom modules for London businesses upgrading from Odoo 14, 15 or 16 to Odoo 17 or 18: a compatibility assessment against the target version, ORM and API change remediation, view definition updates for the OWL framework where applicable, and regression testing in staging before the production upgrade.

Upgrade path assessments are recommended during the original custom development project so migration complexity is understood from the outset.

Our process

How does Softomate deliver custom Odoo modules?

A structured four-stage process: discovery and specification, build in two-week sprints, user acceptance testing, and go-live with a hypercare period. Business owners, operations leads and IT contacts stay involved throughout, so the module matches the specification and your team is confident using it from day one.

  1. Discovery

    Map the process the module will serve

    Colleagues mapping a workflow with notes on a wall
    Library photography, not client work.

    Structured workshops with the process owner, IT lead and data protection officer map the business process, the data model it needs, the business logic rules it must enforce, the user roles and the third-party systems to integrate.

    What you receiveA process flow diagram, a candidate data model, a list of API integrations and a UK GDPR compliance map covering lawful basis, retention rules and access controls.

    How we do this

    Discovery for a focused single-module project typically takes two to four working days.

    The discovery output is the basis for the fixed-price functional specification and project quote.

  2. Specification

    Agree exactly what will be built

    Reviewing charts and project information on a tablet
    Library photography, not client work.

    The functional specification defines the complete data model, field types, computed field logic, automated rules, access rights by role, UI view layouts, API integration payloads and acceptance criteria for every feature.

    What you receiveA signed functional specification, the single reference document for the build and UAT phases.

    How we do this

    Softomate technical architects and your process owner review and sign off the specification before development begins, which prevents scope misalignment and reduces rework.

    Any change to scope after sign-off is handled through a formal change request with a written cost and timeline impact before additional work is undertaken.

  3. Build

    Build in two-week sprints with a demo each time

    Colleagues reviewing software on two monitors
    Library photography, not client work.

    Softomate engineers develop the module in Python using the Odoo ORM, framework conventions and the OWL JavaScript framework, committing to a version-controlled repository with automated unit tests covering the core business logic.

    What you receiveA client demo at the end of each sprint, in a shared staging environment where you can interact with the module.

    How we do this

    API integrations are connected to sandbox credentials during build and switched to live credentials at go-live.

    UK GDPR access controls, field-level permissions and automated retention rules are applied during the build, in line with the compliance map from discovery.

  4. UAT and go-live

    Test with your users, then go live safely

    A team attending a presentation in a meeting room
    Library photography, not client work.

    User acceptance testing runs the UAT test script from the specification against every feature in staging with your process users. Softomate QA leads facilitate the sessions, log defects and manage the fix cycle.

    What you receiveA module deployed to production with a rollback plan in place, followed by a fourteen-day hypercare period with priority support response.

    How we do this

    API integration accuracy is verified against the acceptance criteria for each integration endpoint.

    After go-live the Softomate account manager schedules a thirty-day review to assess module performance and identify refinements based on live usage data.

Relevant results

What have custom Odoo modules achieved?

Case study outcomes from real Softomate Odoo custom development projects. Client names are anonymised per NDA, and results are specific to each project.

Manufacturing · West London precision engineering · 30 machinists

Job card processing time reduced by 65 per cent

A West London precision engineering company with 30 machinists replaced paper job cards and manual daily production logs with a custom Odoo manufacturing module built by Softomate. Real-time work centre data capture eliminated end-of-shift manual data entry.

Operator time-to-work-order accuracy improved from 70 per cent to 97 per cent within four weeks of go-live. Quality checkpoint records for customer audit evidence were generated automatically on job completion.

65 per centreduction in job card processing time

70 to 97 per centoperator time-to-work-order accuracy within four weeks of go-live

Figures reported for a real Softomate project. Client identity is anonymised per NDA; results are specific to that project.

Property management · London · 120 leasehold units across four blocks

Service charge allocation automated for 120 units

A London residential property management company replaced a spreadsheet-based service charge system with a custom Odoo property module. It calculated service charge allocations by lease percentage, raised quarterly invoices automatically and linked maintenance purchase orders to the correct service charge account.

Tenant disputes over service charge calculations reduced by 80 per cent as all allocation logic was transparent and auditable within the module.

3 weeks to 2 daysyear-end reconciliation time

80 per centfewer tenant disputes over service charge calculations

Figures reported for a real Softomate project. Client identity is anonymised per NDA; results are specific to that project.

SaaS · London B2B company · 400 subscribers

Subscription billing errors eliminated

A London B2B SaaS company replaced a manual billing process involving Stripe exports and Excel calculations with a custom Odoo subscription billing module. Proration on mid-period plan changes, failed payment dunning with three-attempt retry logic and subscriber self-service plan changes were all handled automatically.

Billing errors that previously affected 8 per cent of invoices each month fell to zero within two months of go-live.

8 per cent to zeroinvoices affected by billing errors each month, within two months of go-live

12 hours to under 90 minutesfinance billing preparation time per month

Figures reported for a real Softomate project. Client identity is anonymised per NDA; results are specific to that project.

Professional services · London management consultancy · 50 people

Vendor invoice processing 75 per cent faster

A 50-person London management consultancy processing 300 vendor invoices per month deployed a custom Odoo document AI module that extracted line items, VAT amounts and supplier references from incoming PDF invoices. The data populated Odoo vendor bill fields and routed bills to the correct approver based on amount and cost centre.

The accounts payable team of two handled the same volume with one day per week of processing time instead of three and a half days.

75 per centless accounts payable staff time on invoice processing within thirty days

1 day per weekinstead of three and a half days

Figures reported for a real Softomate project. Client identity is anonymised per NDA; results are specific to that project.

Delivery timeline

How long does bespoke Odoo development take?

Timelines depend on the complexity of the functional specification and the number of API integrations required. A discovery workshop at the start of every project produces a milestone-level delivery plan with specific dates before build begins.

Focused single-module build

3-5 weeks

From discovery sign-off to UAT-ready delivery, with a clear functional specification.

Mid-complexity module build

5-8 weeks

Multiple related models, custom UI views and one or two API integrations.

Complex multi-module system

8-14 weeks

Machine learning layers and multi-API integrations.

Planning information, not a delivery guarantee. Development runs in short two-week sprints with a client demo at the end of each, so feedback is incorporated continuously rather than batched at the end.

Pricing and running costs

How much does custom Odoo module development cost?

A focused single-module build starts from £3,500 for implementation. Optional monthly care starts from £199/month. Prices exclude VAT; required licences, hosting and usage are confirmed separately before you commit.

Starting prices excluding VAT

Small Odoo custom extensionFrom £3,500

One-off implementation. One defined extension with testing and deployment; major migrations and multiple modules separate.

Optional monthly careFrom £199/month

Care is optional after client-managed handover and forms part of the fee while we manage your chosen service. We agree the monitoring, maintenance and technical assistance covered by your plan.

Costs to allow for separately

Licences, hosting and usage
Your proposal identifies any required software licences, hosting and usage charges. These can include your existing Odoo subscription, suitable custom-module hosting where required and selected IAP, API or hosting consumption. There is no automatic AI charge.
Larger scope and later development
Most engagements, from focused configuration to full custom development, typically cost £3,500 to £25,000 and take two to fourteen weeks depending on complexity. Additional development is quoted separately.

Any starting prices exclude VAT. We identify licences, hosting and usage separately, reuse suitable existing subscriptions and charge shared platform access once for the agreed account.

Discuss your requirements →

Why Softomate and aftercare

Why choose Softomate for custom Odoo development in London?

Fixed-price delivery, native modules, UK GDPR built in and upgrade planning in every project.

Software development work shown on the Softomate homepage

Fixed price on a signed functional specification

Every project is delivered at a fixed price based on a signed functional specification covering the data model, business logic, access controls, API integrations and acceptance criteria before any code is written.

Discovery is free, and the fixed-price proposal is delivered within 5 working days of the discovery session. Scope changes go through a formal change request with a written cost and timeline impact, so there are no surprise invoices.

A property management tenancy module replacing two disconnected spreadsheets was delivered at £7,200 fixed price. Rent schedule automation saved 18 hours per month for a 4-person team.

Native modules with an AI layer on request

Modules are built within the Odoo ORM and framework, so they appear in the standard UI, respond to standard Odoo access controls and are accessible through the REST API like core modules.

Softomate combines Odoo framework expertise with machine learning, NLP and document AI development, so lead scoring, document processing or email classification can be added as modular layers in the same project.

Document extraction, lead scoring or demand forecasting can be added to custom module data without a second vendor.

UK GDPR and upgrade planning in every project

Every module is designed with field-level access controls, retention schedules and subject access request deletion pathways, mapped during discovery. A UK GDPR compliance review is included before delivery, with ICO-aligned data processing documentation.

FCA-regulated, SRA-regulated and healthcare sector clients get sector-specific compliance controls on the custom data model and permission structure.

An upgrade path assessment is included with every delivery, identifying API changes, ORM deprecations and JavaScript framework updates expected in the next two major Odoo releases. Ongoing support retainers include annual upgrade path reviews as standard.

FAQs

Questions before your custom Odoo project

Further guidance

Explore the project details

More answers on scope, use cases and the decisions behind a custom Odoo build. Open the areas relevant to your team.

More questions about custom Odoo modules
What custom Odoo modules can Softomate build for London businesses?

Softomate builds custom Odoo modules in Python for any business process a London organisation needs to manage within the Odoo framework. Custom module types built for London clients include property tenancy management covering tenancy agreements, rent schedules, break clause tracking, deposit management and section 21 notice logging; legal matter management with court deadline tracking, document versioning and client portal access; subscription billing with proration, dunning, failed payment retry and subscriber portal; manufacturing job card management with real-time work centre tracking, operator time capture and quality checkpoint recording; custom HR modules covering specialised absence policies, skills matrix management and performance review workflows; and AI-powered document processing that extracts line items from PDF invoices and purchase orders into Odoo vendor bills automatically. Every custom module is built within the Odoo ORM and framework so it behaves identically to native Odoo features, appears in the standard Odoo UI and is accessible through the standard Odoo REST API.

How does custom Odoo development differ from standard Odoo configuration?

Standard Odoo configuration adjusts the behaviour of existing Odoo modules using the built-in settings, Odoo Studio no-code tools, automated actions and approval rules available to any Odoo user without writing code. This covers renaming fields, adding custom fields, adjusting workflow stages, setting up automated email triggers and creating basic approval chains. Custom Odoo development goes further by writing Python code within the Odoo framework to create entirely new data models that do not exist in any standard module, implement business logic that the Odoo automated action engine cannot express, build custom UI components using Odoo JavaScript OWL framework, and create API endpoints that expose or consume data in formats that the standard Odoo REST API does not support. The distinction matters for scope and cost: most engagements, from focused configuration to full custom development, typically cost £3,500 to £25,000 and take two to fourteen weeks depending on complexity. Softomate scopes each project during discovery to recommend the minimum level of customisation required, avoiding unnecessary custom code where configuration suffices.

What custom Odoo development includes

Custom modules integrate natively into the Odoo framework, so they behave identically to standard Odoo features, appear in the standard UI and are accessible through the Odoo REST API. Softomate builds them for London businesses across professional services, property, manufacturing, legal, subscription e-commerce and regulated financial services sectors.

The service covers new data model creation, business logic implementation, custom UI development using the Odoo OWL JavaScript framework, and REST API integrations with Salesforce, Stripe, HMRC and other third-party systems. AI augmentation layers add machine learning to Odoo data flows for lead scoring, document classification and demand forecasting.

Custom development can be combined with our full Odoo ERP implementation service and AI process automation. We also deliver business process automation and API development and system integration for processes that extend beyond the Odoo boundary.

Which London businesses need custom Odoo module development?

Custom Odoo development is needed by London businesses whose operational workflows cannot be served by standard Odoo configuration options or the existing module catalogue. These are the most common custom module builds Softomate delivers for London and UK clients.

Custom manufacturing workflow module

London manufacturers needing real-time job card tracking, operator time capture against work orders, custom quality checkpoint records and machine utilisation dashboards get a module that extends Odoo Manufacturing beyond the standard work order and routing features. It adds real-time floor data capture, tooling and fixture tracking, scrap reason codes with corrective action workflows, and live production versus plan dashboards for operations managers.

Property management module

London property management companies and residential landlords manage tenancy agreements, rent schedules, deposit protection, break clause dates, section 21 notices, maintenance requests and service charge allocation. The module links to Odoo Accounting so rent receipts, service charge invoices and contractor purchase orders post to the correct nominal accounts automatically. Landlord reporting packs are generated as scheduled PDF reports from within the module.

Legal matter management module

London law firms and legal technology businesses add court deadline tracking with automatic reminder workflows, document versioning with checkout controls, client portal access for document sharing, billing narrative management and SRA compliance flags to standard Odoo CRM and project functionality. The module links to Odoo Accounting for disbursement billing and WIP reporting, and SRA matter numbering conventions and client ID verification steps are built into matter onboarding.

Subscription billing module

London SaaS companies and subscription service businesses use custom billing modules that handle proration on mid-period plan changes, dunning sequences on failed payments with configurable retry schedules, a subscriber self-service portal with plan upgrade and downgrade, volume discount tier calculation and usage-based billing. Stripe and GoCardless integrations process payments and update subscriber status in Odoo automatically.

Custom HR and workforce management module

For workforce requirements that Odoo HR does not cover out of the box: skills matrix management, multi-tier authorisation for annual leave in organisations with complex reporting lines, specialised absence category tracking for regulated sectors, contractor timesheet capture with IR35 determination flags, and performance review workflows with 360-degree input forms. The module integrates with Odoo Payroll for gross pay calculation based on custom absence and overtime rules.

AI-powered document processing module

London businesses processing large volumes of PDF invoices, purchase orders and supplier contracts use a custom document processing module that extracts line items, VAT amounts, supplier references and payment terms using document AI models. The extracted data populates Odoo vendor bill fields, flags discrepancies against purchase order values and routes the bill to the correct approver based on amount and cost centre rules.

Custom module or Odoo Enterprise upgrade?

Odoo Enterprise licence costs increase with user count and with access to premium modules. A focused custom module built for Community edition delivers specific functionality at a one-time development cost without requiring an Enterprise licence upgrade.

For businesses using four to six Odoo modules and needing one bespoke workflow, a custom Community module typically costs less over three years than upgrading to Enterprise for a single advanced module. Softomate scopes each project to recommend the minimum licence level required before custom development begins.

Related services and reading

AI process automation

Add machine learning, document AI and NLP automation layers to custom Odoo modules for lead scoring, demand forecasting, document classification and AI-powered reporting inside the ERP platform. See business process automation in London.

Odoo ERP implementation

Full Odoo ERP implementation covering core module configuration, data migration from Sage or Xero, UK MTD compliance and third-party API integrations for London businesses replacing legacy systems. See Odoo ERP implementation in London.

Guides

Odoo Migration Guide UK covers planning a data migration into Odoo from Sage, QuickBooks or spreadsheets: records, history, reconciliation and cutover.

What clients say

"From understanding requirements and offering solutions, to implementing functionality accurately and very promptly, your business is in great hands."

R. Nagpal, Google review

Work with us

Let's scope your custom Odoo module

Bespoke Python modules, REST API integration with Salesforce and Stripe and AI augmentation layers can be scoped and quoted from a free discovery workshop.

Deen Dayal Yadav, founder of Softomate Solutions

Deen Dayal Yadav

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