CAD to BIM Services, CAD Modeling & PDF Conversion

Convert legacy CAD drawings, PDF sets, sketches and record documentation into structured architectural, structural and MEP BIM models with coordinated views, schedules and project-defined deliverables.

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2DLegacy Drawing ConversionCAD, PDF, raster, scan and sketch inputs

3DStructured BIM ModelsGeometry, spaces, systems and project information

QCConversion ValidationReferences, dimensions and outputs checked

IFCRequired File FormatsRevit, IFC, DWG, PDF and coordination files

Building project illustrating CAD and PDF to BIM conversion

CAD & PDF to BIM WorkflowFrom Legacy Drawings to Coordinated Digital Building Information

01CAD, PDF, Sketch or Record Drawing

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02Source Review & Model Setup

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03BIM Modeling & Validation

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04Models, Drawings & Exchange Files

SOURCE INFORMATION TRACEDDimensions, levels, references and drawing hierarchy reviewed BIM DELIVERABLES CONTROLLEDModel content, views, schedules and formats aligned to scope

What Is CAD to BIM Conversion?

Transform Disconnected 2D Information into a Coordinated BIM Environment

CAD-to-BIM conversion recreates existing two-dimensional drawings as intelligent three-dimensional models. Instead of redrawing a project only for appearance, the conversion process organizes building elements, levels, grids, spaces, systems and agreed information so the model can support documentation, coordination and future updates.

Structural Drafting Group supports conversion for architectural, structural and MEP requirements. Projects can begin with AutoCAD files, PDF sets, scanned drawings, sketches, record documents or a combination of source formats.

Conversion accuracy depends on the quality and consistency of the source information. Conflicting dimensions, missing sections, unclear revisions and unverified as-built conditions should be identified before final modeling.

Editable Revit models Consistent model views Model-derived drawings Multidiscipline coordination Structured schedules Controlled revisions

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Conversion Services

CAD, PDF, Drawing and Legacy-Information Conversion Options

The correct conversion route depends on the source format, intended model use, required accuracy and downstream deliverables.

2D CAD to BIM Conversion

AutoCAD plans, elevations, sections and details converted into organized architectural, structural or MEP BIM models.

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PDF to BIM Modeling

Vector or scanned PDF drawing sets reviewed and recreated as structured models and model-derived documentation.

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Sketch and Image to BIM

Dimensioned sketches, raster images and marked-up references converted after assumptions and missing information are clarified.

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Architectural CAD to Revit

Walls, spaces, floors, roofs, doors, windows, ceilings, facades, rooms and architectural documentation recreated in Revit.

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Structural CAD to BIM

Structural grids, framing, columns, beams, slabs, foundations and project-defined structural information modeled from drawings.

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MEP CAD to BIM

Mechanical, electrical and plumbing layouts converted into discipline models for coordination and documentation support.

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Legacy Drawing Modernization

Old drawing archives reorganized into current CAD or BIM formats with clearer layers, references, naming and documentation.

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As-Built Drawing to BIM

Verified record drawings and approved redlines converted into existing-condition or handover models.

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Model-Derived Documentation

Plans, sections, elevations, schedules, details and drawing sheets developed from converted BIM models where required.

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Discipline-Specific Conversion

Conversion Support for Architecture, Structure and Building Services

Each discipline uses different model elements, information requirements and validation checks.

Architectural plansStructural framing Concrete and foundationsHVAC layouts Electrical systemsPlumbing and drainage Fire-protection layoutsExisting-condition records

Architectural Conversion

Levels, spaces, rooms, walls, openings, facades, ceilings, finishes and model-derived documentation.

Structural Conversion

Grids, foundations, columns, framing, slabs, structural systems and project-defined element information.

MEP Conversion

Ductwork, piping, trays, fixtures, equipment, service zones, risers and coordination references.

Multidiscipline Coordination

Alignment of converted models, shared coordinates, interfaces, openings, clearances and issue tracking.

Record Documentation

Drawing and model updates based on verified redlines, record sets and approved existing-condition information.

Source Information and Deliverables

Define What Is Available and What the Converted Model Must Support

A conversion project is successful when source hierarchy, modeling assumptions and expected outputs are documented before production.

INTypical Source Inputs

Multiple source types can be combined, but conflicts and differing revision dates must be resolved or clearly documented.

DWG and DXF filesVector PDF drawings Scanned PDF setsHand sketches Raster imagesRecord drawings Survey informationRedlines and markups SpecificationsClient templates

OUTTypical Deliverables

Model, drawing and exchange outputs are agreed around the intended use and the receiving project environment.

Autodesk Revit modelsIFC exchange files Navisworks filesDWG outputs PDF drawing setsPlans and elevations Sections and detailsSchedules Coordination reportsModel-audit notes

Conversion Quality Controls

Validation Before a Converted Model Is Released

The model should be checked against the agreed sources and intended use—not only reviewed visually.

Source Hierarchy

Confirm which drawing set, revision, markups and specifications control when references conflict.

Geometry & Dimensions

Review levels, grids, dimensions, alignments, element positions and major spatial relationships.

Model Standards

Check templates, naming, families, categories, worksets, links, coordinates and project organization.

Deliverable Verification

Confirm requested views, schedules, sheets, exchange files, model health and revision identification.

Conversion Process

A Controlled Workflow from File Review to BIM Delivery

Each stage reduces uncertainty before information is used for coordination, documentation or future design work.

Input Assessment

Review source types, quality, revisions, dimensions, missing information and intended model use.

Project Setup

Confirm software, templates, coordinates, levels, grids, standards, disciplines and deliverables.

BIM Conversion

Create model elements, systems, spaces, information, views and required project documentation.

Validation & Coordination

Compare model content to sources, review interfaces, document assumptions and complete QA/QC.

Delivery & Updates

Issue agreed files and incorporate approved comments through controlled model revisions.

Project Applications

Conversion Support for New, Existing and Renovation Projects

The conversion scope is adapted to the building type, available records and expected downstream use.

Residential buildingsCommercial projects Industrial facilitiesHealthcare buildings Educational projectsHospitality developments Renovation and retrofitRecord-document digitization

Software and Exchange Formats

Software versions and interoperability requirements are agreed before conversion to avoid incompatibility during handover.

Autodesk RevitAutoCAD NavisworksAutodesk Construction Cloud IFCDWG / DXF NWC / NWDPDF Documentation

Project requirements may also include client families, shared coordinates, worksets, naming conventions, model-health rules and formal BIM execution procedures.

Why Structural Drafting Group?

Conversion Support Built Around Downstream Model Use

Our teams combine CAD drafting, discipline modeling, BIM coordination and controlled documentation within one workflow.

✓

CAD and BIM Capability

Legacy drafting knowledge combined with architectural, structural and MEP modeling experience.

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Project-Specific Standards

Conversion aligned to the client’s software version, templates, intended uses and deliverable requirements.

✓

Documented Assumptions

Missing, unclear or conflicting source information identified rather than silently interpreted.

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Scalable Delivery

Support for single drawing sets, large archives, recurring conversion volumes and multidisciplinary projects.

Reusable Digital ModelsLegacy drawings become editable model information for future coordination and updates.

Improved DocumentationPlans, sections, elevations and schedules can be generated from one model environment.

Better CoordinationConverted discipline models can be aligned and reviewed together before downstream use.

Archive ModernizationOlder project records become easier to access, review, update and exchange.

Frequently Asked Questions

CAD and PDF to BIM FAQs

Common questions about source files, conversion accuracy, model content and deliverables.

What is CAD to BIM conversion?

CAD-to-BIM conversion recreates two-dimensional CAD drawings as structured three-dimensional BIM models. The model may include building elements, systems, spaces, agreed information, views, schedules and documentation based on the intended project use.

Can scanned PDF drawings be converted into BIM?

Yes. Scanned PDFs can be used, but their scale, image quality, completeness and dimensional reliability should be assessed. Clear dimensions and supporting sections improve conversion accuracy.

Which disciplines can be converted?

Architectural, structural, mechanical, electrical, plumbing and fire-protection information can be converted, subject to the available source documentation and defined model requirements.

How is CAD-to-BIM different from Scan-to-BIM?

CAD-to-BIM primarily uses drawings, PDFs and design documents as source information. Scan-to-BIM uses point-cloud or laser-scan data representing measured existing conditions. Some existing-building projects use both sources together.

Can drawings and schedules be generated from the converted model?

Yes, when included in scope. Typical outputs may include plans, elevations, sections, details, room information and component schedules generated from the model.

How is conversion accuracy verified?

The model is compared with the agreed source hierarchy, dimensions, levels, grids and reference drawings. Unclear or conflicting information should be raised for clarification or recorded as an assumption.

Which file formats can be delivered?

Typical outputs include Revit, IFC, Navisworks, DWG and PDF files. Software versions, exchange requirements and required documentation should be confirmed before work begins.

What information is needed for a quotation?

Share sample source files, total sheet count, disciplines, building size or number of floors, intended model use, required detail, software version, deliverables, standards and expected schedule.

Internal Service Pathways

Continue to the Relevant BIM or Drafting Service

These contextual internal links connect conversion requirements with specialist modeling and documentation services.

Need CAD, PDF or Legacy Drawings Converted into BIM?

Share sample source files, the number of drawings, required disciplines, intended model use, software version and expected outputs. Our team will review the information and recommend an appropriate conversion workflow.

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