3D BIM Models
(Revit)
Accurate as-built BIM models produced in Autodesk Revit from measured survey and point cloud data — supporting design coordination, refurbishment and project development.
Add photo: bim-hero.jpg
Recommended 1400 x 600pxWhat is a 3D BIM Model?
A 3D BIM (Building Information Model) is a digital model that represents the physical and spatial characteristics of a building. When produced from measured survey and point cloud data, it provides an accurate, data-rich representation of existing conditions that design teams can work directly from.
Unlike CAD drawings, a BIM model is three-dimensional and intelligent — walls, floors, doors, windows and structural elements are modelled as real objects, allowing 2D drawings, sections and schedules to be extracted directly from the model rather than drafted separately.
What We Can Provide
Our BIM modelling services are tailored to suit the requirements of each project. Depending on your needs, we can provide:
- As-built BIM models of existing buildings
- Existing conditions models for refurbishment and retrofit
- Models generated from measured survey and point cloud data
- Level of detail agreed to suit the intended project stage
- 2D/3D drawings extracted from the model (plans, elevations, sections)
- Models structured for practical design team use
- IFC export for open BIM workflows where required
What We Model
- Existing residential and commercial buildings
- Refurbishment and retrofit projects
- Complex architectural layouts
- Heritage and listed buildings
- Industrial and institutional buildings
Level of Detail (LOD)
The level of detail in the BIM model is agreed at the outset to ensure it is appropriate for the project stage and intended use. Typical levels we work to include:
- Concept-level massing models for feasibility and planning
- Detailed as-built models with walls, floors, openings and structural elements
- Coordinated models suitable for design development and clash detection
We discuss LOD requirements with you at enquiry stage — there is no standard approach, and the right level of detail depends entirely on how the model will be used.
Our BIM Process
Accurate Data Capture
BIM models are built from verified survey data — either from a measured building survey, 3D laser scanning, or a combination of both. Using point cloud data as the modelling base ensures the resulting model accurately reflects the existing building geometry.
BIM Modelling & Quality Assurance
Models are developed in Autodesk Revit to the agreed level of detail, with quality checks carried out throughout to ensure accuracy, consistency and correct model structure. All elements are modelled against the verified survey data.
Reliable Delivery
The completed Revit model is issued in agreed formats — RVT, IFC or DWG extracted drawings — within agreed timescales, ready to be used directly within your design team's workflow.
Why Choose SurveyX
Industry-Standard BIM Workflows
All models produced in Autodesk Revit — the industry-standard platform used by architects, engineers and contractors across the UK and internationally.
Survey-Verified Accuracy
Models built from our own measured survey and point cloud data — not scaled from existing drawings or estimated. Every element is referenced against verified site measurements.
Practical, Usable Models
We focus on producing well-structured models that your design team can work with immediately, with clear naming conventions and a logical model organisation.
LOD Agreed at Outset
We agree the level of detail before work starts — ensuring the model is exactly what you need for its intended use, with no unnecessary complexity or missing information.
Experience Across Building Types
We have experience modelling residential, commercial, industrial and heritage buildings — adapting our approach to suit each building's age, condition and complexity.
What is an As-Built BIM Model?
A BIM (Building Information Model) is a three-dimensional digital model of a building where every element — walls, floors, roofs, columns, doors, windows — is represented as an intelligent object with geometry, position and information attached to it.
An as-built BIM model represents a building as it currently exists, produced from measured survey and point cloud data rather than from design intent. This gives design teams an accurate, three-dimensional working environment that reflects real existing conditions — from which floor plans, elevations, sections, schedules and 3D views can all be extracted directly from the model.
All our BIM models are produced using Autodesk Revit — the industry-standard BIM authoring platform used by architects, engineers, contractors and facilities managers across the UK. Models are structured to integrate directly into professional design workflows without significant rework.
What You Receive
An as-built BIM model is a rich, multi-use deliverable. Below are examples of the outputs that can be produced from a Revit model. Add your own project screenshots as your portfolio grows.
Revit 3D view — existing building model from point cloud data
Floor plan extracted from Revit model
Section extracted from Revit model
Elevation extracted from Revit model
Point cloud loaded in Revit — scan-to-BIM workflow
IFC model loaded in open BIM viewer
How We Build Your BIM Model
Our as-built BIM models are built from verified survey data using a disciplined, quality-checked modelling workflow in Autodesk Revit. Here is how we work from survey to delivered model.
Survey data foundation
Every BIM model we produce is built from verified site data — either from our own measured survey, a registered point cloud from laser scanning, or a combination of both. We never model from unverified existing drawings or assumptions. The quality of the model reflects the quality of the survey data beneath it.
Point cloud to Revit
Where laser scan data is available, the registered point cloud is loaded directly into Revit. We model walls, floors, ceilings, roofs, structural elements, doors and windows by tracing and fitting Revit families and components to the scan data — ensuring the model geometry matches the actual building.
Level of Detail (LOD)
The level of detail in the model is agreed at the outset. LOD 200 captures approximate geometry and is suitable for early feasibility. LOD 300 captures specific geometry — exact wall thicknesses, opening sizes, structural element dimensions — for design development and coordination. We discuss and agree the appropriate LOD for your project before work starts.
Model structure and organisation
Models are structured with a clear level and grid setup, logical family naming, and organised views — floor plans, sections, elevations and 3D views — ready for use. We follow Revit best practice to ensure the model works cleanly in your team's software environment.
Quality assurance
The completed model is reviewed against the survey data to verify that geometry is correctly represented and that no significant elements have been missed. Discrepancies between the model and the survey data are resolved before delivery.
2D drawing extraction
Floor plans, elevations and sections can be extracted directly from the model as fully annotated DWG drawings — eliminating the need to produce 2D drawings separately and ensuring complete consistency between the model and the drawings.
The Value of an As-Built Revit Model
Design in 3D from day one
An existing conditions model gives your design team a fully three-dimensional working environment from the start of the project — enabling 3D design, clash detection and coordination that is simply not possible with 2D drawings alone.
Extract any drawing instantly
Floor plans, elevations, sections and schedules are all extracted directly from the model. Any change to the model is reflected immediately in all drawings — eliminating inconsistency between drawing sheets.
Coordinate across disciplines
A shared existing conditions model gives all consultants — architect, structural engineer, MEP — a common, accurate reference. Coordinating new design work against a shared model dramatically reduces the risk of inter-discipline clashes.
Enable clash detection
New structural, services and architectural elements can be checked for clashes against the existing building model before construction begins — finding and resolving problems at the design stage rather than on site.
Support future works
An as-built Revit model is a long-term asset. It supports future refurbishment, fit-out, extension and maintenance planning — reducing the need to re-survey the building for subsequent projects.
Satisfy BIM requirements
Many public sector and large commercial projects now mandate BIM deliverables. An as-built Revit model of existing conditions is frequently the first step in meeting a project's BIM requirements.
What Goes Wrong Without an Accurate BIM Model
As-built BIM models are increasingly the norm on refurbishment and retrofit projects. Here are the problems that arise when existing conditions are not properly captured in 3D.
Modelling from unverified drawings
Building a design model on top of existing drawings that have never been verified against the actual building is a significant risk. Errors in the base drawings become embedded in the design — and discovered on site.
2D-only coordination
Coordinating complex refurbishment projects using only 2D drawings leaves a large number of spatial conflicts undetected until construction. Pipes, ducts, structural elements and architectural finishes clash in three dimensions, not two.
Re-modelling for each project
Without a permanent as-built model, each new project involving the same building starts from scratch. Maintaining an accurate Revit model eliminates repeated survey and modelling costs.
Inaccurate energy modelling
Building energy models require accurate geometry. Models produced from unverified drawings or approximate dimensions produce inaccurate energy analysis — undermining decarbonisation and retrofit planning decisions.
Facilities management without spatial data
Facilities and estates teams managing buildings without accurate 3D models lack the spatial context needed to plan works efficiently — leading to wasted time and avoidable costs.
What Affects the Cost
BIM model costs depend on the source data, building size and required level of detail. We agree scope and LOD at the outset so there are no surprises.
Source data
Models produced from existing point cloud data cost less than a combined survey-and-model commission. If you already have scan data, we can model directly from it.
Building size and complexity
Larger buildings with more floors, rooms and complex elements take longer to model. Irregular geometry — curved walls, complex roofs — adds modelling time.
Level of Detail (LOD)
LOD 200 concept models cost less than LOD 300 detailed models. The right LOD depends on how the model will be used — we discuss this with you upfront.
2D drawing extraction
Extracting and annotating a full set of 2D drawings from the model adds time but delivers significantly more value — particularly if the drawings are needed for planning or construction.
IFC export and compatibility work
Preparing the model for IFC export or adapting it for a specific software environment may add a small amount of time to the overall programme.
Turnaround time
BIM modelling is time-intensive. Standard delivery is typically 2–3 weeks from receipt of survey data, depending on building size and complexity.
Get a clear quote
Tell us about your building, what survey data you have and what you need the model for. We'll provide a clear, competitive quote within 1 working day.
Request a Free QuoteBuilt for Design Teams
Architects
Accurate existing condition models to design from — no separate base drawing required.
Structural Engineers
Geometrically accurate 3D models for structural analysis and coordination.
BIM Coordinators
Well-structured existing conditions models ready for multi-discipline coordination.
MEP Engineers
Existing building model to plan services routes and identify spatial constraints.
Developers
Detailed existing conditions models to inform refurbishment feasibility and costing.
Facilities Managers
Accurate as-built models for estates management, maintenance planning and space management.
When You Need an As-Built BIM Model
As-built BIM models are increasingly required on refurbishment and retrofit projects. Here are the most common scenarios where they deliver real value.
Refurbishment & Retrofit
An accurate existing conditions model lets the design team plan proposed works with full spatial awareness — identifying constraints, coordinating services and reducing the risk of on-site surprises.
Multi-Discipline Coordination
A shared BIM model of existing conditions gives all consultants — architect, structural, MEP — a common, accurate reference from which to develop their designs simultaneously.
Clash Detection
Modelling new works within an accurate existing conditions model allows clashes between proposed structure, services and existing building fabric to be identified and resolved before work begins on site.
Planning & Heritage Applications
BIM models can be used to produce accurate and consistent drawings for planning submissions, listed building consent applications and heritage impact assessments.
Facilities & Asset Management
An as-built Revit model of an existing building provides a lasting asset record — supporting space management, maintenance planning and future capital works.
Energy & Environmental Analysis
Accurate building geometry is a prerequisite for meaningful energy modelling and environmental performance analysis — particularly important on retrofit and decarbonisation projects.
Common Questions
Request a BIM Model Quote
Tell us about your project and we'll respond with a clear, competitive quote within 1 working day.