75% off first purchase + included premium onboarding.
Estimate Models, Options, Site Work, and Client Changes in One Workflow

Modular Home Builder Software

Erro helps modular home builders organize model pricing, option packages, site-specific scope, client proposals, and approved changes. Build a clearer sales-to-estimate workflow without treating every home as a blank-slate quote.

No credit card required. Create your account immediately.

Solving Real Problems for Your Team

Our platform is designed to address the unique challenges faced by owners, managers, estimators, sales teams, and clients—empowering everyone to achieve better outcomes, together.
Model pricing and job-specific site work need different estimating logic

Use reusable items and assemblies for repeatable model scope, then add the excavation, foundation, utilities, delivery coordination, and other site conditions that belong to the individual project. This makes the structure of the quote easier to review.

  • Create reusable model and option assemblies

  • Separate factory scope from site-built work

  • Keep site-specific allowances visible

  • Review exclusions before sending a proposal

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    Options and upgrades make a standard model difficult for clients to compare

    Organize included specifications, package upgrades, and client choices so the base price is distinct from optional work. A repeatable option structure reduces manual re-entry and gives the client a clearer approval decision.

  • Build reusable finish and upgrade packages

  • Show included and optional scope separately

  • Document allowances and assumptions

  • Preserve the pricing behind each revision

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    Manufacturer updates and local vendor costs can make old quote inputs unreliable

    Assign ownership for regularly reviewed inputs and record the source of meaningful cost changes. For material, freight, or local labor conditions that vary by project, validate the current input before committing to the client price.

  • Maintain a shared library of recurring costs

  • Record supplier or manufacturer price sources

  • Review high-risk costs before proposals

  • Test updates with a representative estimate

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    Client changes require a record that protects the original agreement

    Treat a model revision, site-condition change, or homeowner upgrade as a documented change from the approved estimate. The change-order workflow keeps the added scope, price, and client approval connected to the original record.

  • Create changes from the accepted estimate

  • Explain what was added, removed, or revised

  • Send a clear approval request

  • Keep approved changes visible for billing

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    Sales teams need a clear path from inquiry to proposal and payment

    Connect lead details, model interest, estimate context, proposal status, and invoicing in one workflow. Erro works on desktop and mobile, and a 30-day free trial lets your team test the process with a real opportunity.

  • Organize leads and next follow-up steps

  • Create proposals from estimate context

  • Set invoices and payment milestones

  • Accept online payments through Stripe

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    Construction software solutions by business type

    Explore workflows for the way your team estimates, sells, and manages client changes.

    Construction Estimating Software

    Estimate, propose, manage changes, and invoice from one workspace.

    Commercial Construction Estimating

    For detailed bids, revisions, and commercial proposal workflows.

    Construction Cost Database Software

    For teams that need shared pricing, assemblies, and estimate consistency.

    Construction Marketing Automation

    For lead capture, estimate follow-up, and connected client communication.

    Construction Payment Reminders

    For invoices, payment plans, online payments, and follow-up.

    Construction Profitability Workflows

    For estimates, scope changes, billing, and more informed pricing decisions.

    Trades & Construction

    For specialty contractors and trade businesses.

    Custom Remodelers

    For repeatable scope, material, and change-order pricing.

    Custom Home Builders

    For detailed estimates, selections, and client approvals.

    Modular Home Builders

    For model pricing, option packages, site work, and client changes.

    Design & Build Firms

    For design-build teams that need a connected sales workflow.

    Fabricators & Manufacturers

    For organized estimates, orders, and client change management.

    Agencies & Consultants

    For client-facing teams managing proposals and sales activity.

    Modernizing Sales Teams

    For teams replacing manual sales processes and spreadsheets.

    Ready to estimate and sell more efficiently?

    Start your 30-day free trial, create an account immediately, and build accurate estimates and proposals from desktop or mobile.

    No credit card required. Create your account immediately.

    Everything your team needs to stay in sync.

    From leads to invoices, Erro keeps your team aligned. Built-in CRM and project management tools help you track clients, assign tasks, and stay updated on every job.

    CRM & Contact Forms

    CRM & Contact Forms

    Capture, organize, and manage leads in one place to keep your pipeline moving. Collect leads from web forms, phone calls, and referrals, then track interactions, apply custom tags and statuses, and collaborate with your team to turn more opportunities into conversions.

    CRM & Contact Forms
    Marketing Automation

    Marketing Automation

    Automate outreach to save time and boost conversions. Set up email campaigns, schedule follow-ups, and use custom email templates to maintain a consistent brand presence and streamline communications at scale.

    Marketing Automation
    Product Library

    Product Library

    Centralize all your offerings with up-to-date pricing, tax profiles, and budget tracking. Add items to estimates, proposals, and invoices with accuracy, without relying on spreadsheets or manual calculations.

    Product Library
    Sales Templates

    Sales Templates

    Build reusable templates for all your sales documents, including estimates and proposals. Support complex assemblies, base and option pricing, and item groupings. Save, update, and copy templates to streamline workflows, reduce errors, and accelerate sales cycles.

    Sales Templates
    Estimate Creation

    Estimate Creation

    Create accurate estimates in minutes using templates and live pricing from your product library. Adjust items, quantities, and pricing with confidence, then send proposals directly from your estimates to clients for faster approvals.

    Estimate Creation
    Proposals

    Proposals

    Create, manage, and send professional proposals with ease. Customize templates, track client interactions, and streamline the approval process to close deals faster.

    Proposals
    Invoices & Payments

    Invoices & Payments

    Generate invoices from proposals and record payments seamlessly. Automate billing notifications, track payment status, and manage recurring or scheduled invoices—all from a single dashboard.

    Invoices & Payments
    Change Orders

    Change Orders

    Manage change orders efficiently by linking them directly to estimates and proposals. Track payments and current pricing, update line items easily, and keep your team informed with dashboard visibility and automated approval workflows.

    Change Orders

    Ready to estimate and sell more efficiently?

    Start your 30-day free trial, create an account immediately, and build accurate estimates and proposals from desktop or mobile.

    No credit card required. Create your account immediately.

    Frequently Asked Questions

    • How do I access Erro?

    • How do I get started with Erro?

    • Can I change my subscription plan later?

    • Is Erro suitable for small businesses?

    • How is billing managed?

    • Does Erro offer customer support?

    • Can I import my existing data into Erro?

    • Is Erro Mobile-Friendly?

    • How do I add my lead form to my website?

    • Is my data secure with Erro?