SharePoint Development | Custom SPFx

EPC Group — founded in 1997, headquartered in Houston, a Microsoft Solutions Partner holding all six solutions designations — builds custom SharePoint solutions with SharePoint Framework, Power Apps and Power Automate for healthcare, financial services, higher education and defense organizations.

Firms to consider for “sharepoint development agency”

Grouped by archetype, not ranked. Each firm is described from its own public pages; the right fit depends on your platform, regulatory profile and how much of the work you want a senior architect to lead.

Avanade (global system integrator, Microsoft-only) — Accenture and Microsoft joint venture headquartered in Seattle; works only on the Microsoft platform.
Slalom (regional consultancy, multi-platform) — Seattle-based consultancy that delivers through local-market teams across Microsoft and other platforms.
Rightpoint (digital experience firm) — Chicago digital experience firm, part of Genpact; SharePoint and Microsoft 365 intranet and employee-experience work.
Withum Digital (advisory-firm Microsoft practice) — The Microsoft practice of the advisory firm Withum; SharePoint, Microsoft 365 and Copilot for public sector, financial services and healthcare.
EPC Group (Microsoft-first specialist) — Houston-based Microsoft consulting firm founded in 1997 holding all six Microsoft Solutions Partner designations; senior-architect-led programs for healthcare, financial services, higher education and defense.
Pragmatic Works (training-led Microsoft consultancy) — Jacksonville, Florida; Microsoft data platform and SharePoint consulting alongside a training and certification business.

EPC Group builds custom SharePoint solutions using the SharePoint Framework (SPFx), Power Apps, Power Automate, and custom APIs. We develop web parts, extensions, intranet solutions, and Teams integrations for Fortune 500 and regulated-industry clients. Every solution follows Microsoft's modern development standards — no classic add-ins, no deprecated APIs.

Key Facts

Microsoft consulting since 1997. 6,500+ SharePoint implementations including custom development.
SPFx (SharePoint Framework) is the only supported custom development model in SharePoint Online.
Power Apps replaces InfoPath — we convert legacy forms to Power Apps as part of migrations.
Power Automate replaces SharePoint 2010 and 2013 workflows — both are now retired.
All development follows security-first, performance-optimized, and clean-code standards.

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Custom SharePoint Development

SharePoint Development Services

Last updated October 7, 2026 by Errin O'Connor, Founder & Chief AI Architect, EPC Group

SPFx DevelopmentPower AppsPower AutomateAPI IntegrationCustom Web Parts

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6,500+

SPFx Projects

100K+

Users Served

40%

Faster Delivery

1997

Founded

Our Services

Custom SharePoint Development Solutions

From custom web parts to complex workflow automation, we deliver tailored solutions that solve real business challenges.

Custom Web Parts

Build powerful, reusable web parts using SharePoint Framework (SPFx) that extend SharePoint capabilities and deliver tailored user experiences.

React-based SPFx web parts
Property pane customization
Dynamic data connections
Responsive mobile-first design
Multi-language support
Theme-aware components

SPFx Extensions

Extend SharePoint with application customizers, field customizers, and command sets that enhance functionality across your entire tenant.

Application customizers
List view command sets
Field customizers
Form customizers
Search extensions
Header/footer injections

Power Apps Solutions

Create custom business applications with Power Apps that integrate seamlessly with SharePoint data and extend functionality to mobile devices.

Canvas app development
Model-driven apps
SharePoint list integration
Custom connectors
Offline capabilities
Role-based access

Power Automate Workflows

Automate business processes with Power Automate flows that streamline operations, reduce manual tasks, and integrate with 500+ services.

Approval workflows
Document processing
Notification systems
Data synchronization
Scheduled automation
Multi-stage workflows

API Development

Build custom APIs and integrations that connect SharePoint with line-of-business applications, external systems, and third-party services.

Azure Functions integration
REST API development
Graph API solutions
Custom connectors
Webhooks & event handlers
Secure authentication

Intranet Development

Design and build modern intranet portals that improve employee engagement, communication, and productivity across your organization.

Modern site templates
News & communication hubs
Employee directories
Department sites
Custom navigation
Branding & theming

Development Expertise

Specialized Development Areas

Deep expertise across the entire SharePoint and Power Platform development ecosystem.

Modern SharePoint Development

Leverage the latest SharePoint Online features and capabilities with modern development practices.

SharePoint Online site templates
Modern site provisioning
Site scripts & site designs
Hub sites architecture
Communication sites
Team sites optimization

SharePoint Framework (SPFx)

Build client-side solutions using the official SharePoint development framework with React and TypeScript.

SPFx 1.x development
React functional components
TypeScript best practices
PnPjs library integration
Microsoft Graph integration
Teams tab development

Power Platform Integration

Extend SharePoint with the Power Platform ecosystem for automation, apps, and analytics.

Power Apps embedded solutions
Power Automate cloud flows
Copilot Studio agents (formerly Power Virtual Agents)
Power BI embedded reports
Dataverse integration
Custom connector development

Development Standards

Enterprise-Grade Development Practices

Every solution we build adheres to rigorous quality standards and enterprise best practices.

Clean Code Standards

All development follows industry best practices with TypeScript, comprehensive testing, and thorough documentation.

Security-First Approach

Solutions built with enterprise security in mind, including proper authentication, authorization, and data protection.

Performance Optimized

Lightweight, fast-loading solutions that minimize bundle size and maximize user experience.

Reusable Components

Modular architecture with reusable components that accelerate future development and reduce costs.

Highly Configurable

Flexible solutions with rich configuration options that adapt to changing business requirements.

Fully Tested

Comprehensive test coverage with unit tests, integration tests, and end-to-end testing.

Our Methodology

How We Build SharePoint Solutions

Our proven development methodology ensures successful delivery of high-quality solutions on time and within budget.

Discovery & Requirements

We analyze your business needs, existing environment, and user requirements to define a comprehensive development roadmap.

Technical requirements document

Solution architecture

Development timeline

Design & Prototyping

Create wireframes, mockups, and interactive prototypes to validate the solution before development begins.

UI/UX designs

Interactive prototypes

Technical specifications

Agile Development

Build solutions using agile sprints with continuous feedback, code reviews, and iterative improvements.

Working software increments

Sprint demos

Documentation updates

Testing & QA

Rigorous testing including unit tests, integration tests, UAT, and performance testing ensures quality delivery.

Test reports

Bug fixes

Performance benchmarks

Deployment & Training

Deploy to production with proper change management, documentation, and training for your team.

Production deployment

User documentation

Training sessions

Support & Enhancement

Ongoing support, maintenance, and continuous improvements based on user feedback and evolving needs.

Bug fixes & patches

Feature enhancements

Performance monitoring

Technology Stack

Modern Development Technologies

We leverage the latest Microsoft technologies and industry-standard tools to build robust, maintainable solutions.

Frontend

React
Component-based UI library
TypeScript
Type-safe JavaScript
SCSS/CSS Modules
Scoped styling
Fluent UI
Microsoft design system

SharePoint

SPFx 1.x
SharePoint Framework
PnPjs
Pattern & Practices library
CSOM/REST
SharePoint APIs
Site Scripts
Site provisioning

Power Platform

Power Apps
Low-code app development
Power Automate
Workflow automation
Copilot Studio
Chatbot and agent development (formerly Power Virtual Agents)
Dataverse
Data platform

Backend & Cloud

Azure Functions
Serverless compute
Microsoft Graph
Microsoft 365 API
Azure AD
Identity & auth
Azure DevOps
CI/CD pipelines

Why EPC Group

The SharePoint Development Partner You Can Trust

With Microsoft ecosystem expertise since 1997 and hundreds of successful SPFx implementations, EPC Group delivers custom SharePoint solutions that drive real business value.

Microsoft Solutions Partner Heritage

Certified expertise with direct access to Microsoft engineering teams for complex implementations.

Enterprise Security Focus

HIPAA, GDPR, SOC 2, and FedRAMP compliance expertise built into every solution.

Dedicated Development Teams

Experienced developers who understand both technology and business requirements.

Business-Focused Solutions

We focus on solving business problems, not just writing code. Your ROI is our success metric.

Ready to Build Your Custom Solution?

Schedule a free consultation with one of our SharePoint development experts to discuss your project requirements and how we can help.

Free technical consultation
Solution architecture review
Detailed project estimate
No-obligation proposal

Start Your Development Project

Frequently Asked Questions

What types of custom SharePoint development does EPC Group provide?

EPC Group builds custom SPFx web parts, application customizers, field customizers, command sets, Power Apps solutions, Power Automate workflows, custom APIs, Teams integrations, and full SharePoint intranet solutions. All development follows Microsoft best practices and is built for long-term maintainability.

What is SPFx and why should we use it for SharePoint development?

SharePoint Framework (SPFx) is Microsoft's modern development model for SharePoint Online. It uses React/TypeScript, runs client-side, and integrates natively with Microsoft 365. SPFx is the recommended approach because it's fully supported, works with modern sites, and provides the best performance and security.

When should we use Power Apps instead of custom SPFx development?

Power Apps is ideal for business-led solutions with standard forms, simple workflows, and rapid prototyping (days to weeks). Custom SPFx development is better for complex UI requirements, performance-critical applications, deep integrations with external APIs, and solutions requiring fine-grained control. EPC Group helps you choose the right approach based on complexity, maintenance, and cost.

How long does a typical SharePoint development project take?

Simple SPFx web parts take 2-4 weeks. Medium-complexity solutions with Power Apps and Power Automate workflows typically take 4-8 weeks. Full intranet builds or complex application development range from 8-16 weeks. EPC Group provides detailed timelines after a discovery session.

How much does custom SharePoint development cost?

Costs depend on complexity and scope: simple web parts are the entry tier, mid-range solutions with workflows and integrations sit above that, and enterprise intranet projects and complex applications are the largest engagements. EPC Group provides fixed-price proposals after requirements gathering.

How does EPC Group handle governance for custom SharePoint solutions?

EPC Group implements ALM (Application Lifecycle Management) with CI/CD pipelines, automated testing, staging environments, and approval workflows. All solutions include documentation, admin guides, and training. EPC Group also establishes coding standards, security reviews, and update procedures for long-term maintainability.

Related Services

Explore our other SharePoint and Microsoft consulting services.

SharePoint Consulting

Comprehensive SharePoint consulting for migrations, governance, and strategy.

Learn More

Intranet Design

Modern intranet design and development for employee engagement and collaboration.

Learn More

Microsoft Teams

Teams development and integration with SharePoint for unified collaboration.

Learn More

Let's Build Something Amazing Together

Transform your SharePoint environment with custom solutions that solve real business challenges. Our expert developers are ready to bring your vision to life.

Start Your Development Project Call (888) 381-9725

Free consultation. No obligation. Response within 24 hours.

SharePoint Development Services

EPC Group creates tailored SharePoint solutions with the SharePoint Framework (SPFx), Power Apps, Power Automate, and custom APIs. We deliver:

Web parts
Extensions
Intranet solutions
Teams integrations

Our clients include Fortune 500 companies and those in regulated industries. Each solution adheres to Microsoft's modern development standards — no classic add-ins or deprecated APIs.

Custom SharePoint Development Solutions

Custom Web Parts

Employee directory web parts pulling from Azure AD.
News aggregators with audience targeting.
Department dashboard web parts with Power BI embedding.
Custom search experience web parts using PnP Modern Search.
Event calendars, org charts, and quick-link panels.

SPFx Extensions

Application customizers for custom headers, footers, and notification banners.
Field customizers to render metadata columns with custom formatting.
Command sets for document library toolbar actions.
ListView Command Set extensions for bulk operations.

Power Apps Solutions

Custom form replacements for SharePoint lists (replaces InfoPath).
Canvas apps for complex multi-step data entry workflows.
Model-driven apps backed by Dataverse for enterprise data management.
Power Apps portals for external-facing forms with SharePoint list write-back.

Power Automate Workflows

Document approval flows with multi-stage routing and escalation.
Automated metadata tagging triggered by content type.
Cross-system notifications to Teams channels on list item changes.
Scheduled data sync flows between SharePoint and external systems.
Replacing legacy SharePoint 2010 and 2013 workflows (both retired).

API Development and Integrations

Custom Azure Functions acting as middleware between SharePoint and external APIs.
Microsoft Graph API integrations for user, calendar, and mail data.
REST API connectors for SAP, Salesforce, ServiceNow, and Dynamics 365.
Teams tab integrations surfacing SharePoint content inside Microsoft Teams.

Modern SharePoint Information Architecture

Development work only succeeds on a sound information architecture. We design the IA before writing a single line of code.

Hub-spoke pattern: 1 root hub per business unit, 5–15 spoke sites per hub.
Mega-menu navigation tied to Viva Connections.
Sensitivity-label-driven sharing controls.
Flat-IA migrations get content discovery that follows the business structure once the hub-spoke restructuring lands.

Enterprise Development Standards

We follow Microsoft's recommended practices for every engagement.

Clean code — TypeScript, React, and SPFx Yeoman generator; no jQuery or classic JSOM.
Security-first — OAuth 2.0, least-privilege Graph permissions, and Azure AD app registrations with admin consent.
Performance-optimized — lazy loading, CDN delivery, and bundle size monitoring against SharePoint's performance benchmarks.
ALM pipeline — Azure DevOps CI/CD for SharePoint package deployment; automated testing before production release.

Frequently Asked Questions

What is the SharePoint Framework (SPFx)?

SPFx is Microsoft's client-side development model for SharePoint Online and SharePoint Server. It uses TypeScript and React. This is the only supported method for creating custom web parts and extensions in modern SharePoint.

Classic add-ins are no longer supported.

Can you convert our InfoPath forms to Power Apps?

Yes, InfoPath is retired. We convert InfoPath forms to Power Apps during SharePoint migrations or as separate projects.

Power Apps forms offer several features:

Connection to SharePoint lists
Support for complex conditional logic
Multi-screen flows
Approval routing

Can you replace our SharePoint 2013 workflows?

SharePoint 2010 and 2013 workflows are retired. We can rebuild these workflows in Power Automate. This provides:

Better reliability
Teams notifications
A native connection to hundreds of external services

Migration usually takes 1–4 weeks per workflow. The duration depends on the complexity of each workflow.

How do you price SharePoint development projects?

Simple web parts and Power Apps forms are the smallest fixed-fee engagements; complex intranet builds and multi-system integrations are the largest. Every engagement is quoted fixed-price after a scoping assessment.

We offer:

Fixed-fee quotes for clearly defined projects
Time-and-materials pricing for exploratory or agile engagements

Start Your Development Project

Talk to a SharePoint developer about your SPFx, Power Apps, or integration project. Call (888) 381-9725 or request a 30-minute discovery call.