Home/Case Studies/Pre-refurbishment building record
Commercial building · Pre-refurbishment survey

A long-vacant building. One secure digital record. Decisions made from anywhere.

External condition surveys, a surveyor's report, 3D and Revit models, Matterport internal tours, the existing measured survey and historic compliance documents, all brought together in one secure portal before refurbishment began.

Roof & façade imagerySurveyor report3D & Revit modelsMatterport toursMeasured survey filesSecure portal
Interactive 3D model Interactive 3D model of a multi-storey red-brick commercial building and the street around it
Interactive 3D model of the building exterior, with measurement and photo tools.
300+Roof images, in 6 sections
4Façade elevations mapped
2Matterport internal tours
12Datasets in the portal
1Secure building record
Project overview

Creating a complete picture before refurbishment

1The brief

The building had been unoccupied for several years and was due to undergo extensive refurbishment. Before design and construction decisions could progress, the client needed a clear understanding of its current condition, and a practical way to show that condition to overseas owners and other stakeholders.

2The complication

A measured survey had already been completed by a third party, but the files sat separately from the rest of the building information. The client wanted one structured place where new survey data, existing drawings and historic compliance records could be stored, reviewed and shared securely.

3Project objectives

  • Set a visual, surveyor-led baseline of the roof and external façades before works started.
  • Create accurate 3D and Revit building information for design, coordination and future asset use.
  • Capture the accessible internal areas digitally, so overseas stakeholders could inspect the building remotely.
  • Bring the measured survey and historic compliance information into the same controlled, shareable portal.
Aerial view of the roof divided into six colour-coded sections, S01 to S06
Roof sectioning. Six defined roof sections, each traceable to its own image set.
Aerial view of the building with four façade elevations marked EL01 to EL04
Façade elevation mapping. Four referenced elevations, so every image has a known location.
01 · ROOF & FAÇADE

Structured roof and façade surveys, not just photographs

The exterior was captured systematically, divided into defined roof sections and elevations, and organised so every image could be traced back to a known location.

Roof sections

S01S02S03S04S05S06

Façade elevations

EL01EL02EL03EL04

The condition record

  • High-resolution imagery tied back to roof sections and façade elevations
  • Surveyor observations, fault classifications and recommended actions
  • A condition baseline to revisit through design, tendering and refurbishment

Why structure matters

On a building that has stood empty for years, the question is rarely "is there a defect?" but "exactly where is it?". Sections and elevations answer that for every image.

02 · SURVEYOR REPORT

Condition evidence turned into a practical action record

The report translated the image set into a written condition record, giving the client a clear view of defects, risks and remedial priorities before refurbishment began.

Cover of the commercial roof survey condition report
Report cover. Issued through the portal.
Report page showing roof section S01 outlined in red with a written summary
Sectioned summary. Location and overall condition of each area.
Report page showing an annotated defect photograph with a red RAG rating
Defect record. Annotated photographs with RAG status.
From the report · Section S01

Multiple slipped and missing slates were identified, with several slates and detached mortar debris having settled within gutter sections.

RedDefective pointingPhotograph S01_003

Observation. Missing mortar pointing at the mitred junctions between the ridge and hip tiles.

Recommended action. Renew the pointing with an appropriate bedding mortar, and check adjacent ridge and hip tiles for stability.

Report outputs

  • Sectioned summaries showing the location and overall condition of each area
  • Defect photographs with annotations, RAG status and supporting thumbnails
  • Clear descriptions and recommended actions for the refurbishment team
03 · 3D & REVIT

From building capture to 3D and Revit outputs

The captured data was converted into interactive, design-friendly models, so project teams could understand the building spatially as well as visually.

Building capture→3D model→Revit model→Online viewer
Photogrammetric 3D model of the building with measurement tools
3D model. A photogrammetric model with distance, angle and area tools.
Revit model of the building's front elevation
Revit model. Building geometry ready for design coordination.
Revit model shown in the portal's online viewer
Online viewer. The Revit model opens in the portal, with no software to install.

What the models are for

Refurbishment planning, remote review, design coordination and future asset management.

Matterport 3D tour start screen showing a ground floor corridorMatterport view of an internal staircase and reception area
Matterport 3D tours. Remote walkthroughs opened straight from the portal.
Measured survey folder in the portal showing PDF and DWG drawing files
Measured survey. The existing third-party drawings, imported as PDF and DWG files.
04 · INTERNAL RECORD

Matterport tours and the existing measured survey in one place

Matterport gave overseas owners and project stakeholders a remote walkthrough of the accessible internal areas, without needing to attend site.

  • Virtual tours of the reception and basement areas
  • Existing measured survey drawings imported alongside the new tours
  • All internal information kept in a single location

A live building record

The portal became a live home for survey files, model outputs, Matterport access and historic compliance documents, with room for future updates.

Secure online portal showing the roof survey folder and a menu of datasets
The Drone Site Surveys secure portal: new and existing building information in one place.
Key valueStakeholders could open the same live building record without handling large file transfers, losing context or relying on fragmented email chains.
05 · PORTAL & OUTCOME

One secure source of truth for owners, consultants and contractors

Instead of a disconnected transfer of images, drawings and reports, everything was organised into a controlled online portal. The client could review the building, move between datasets and share access selectively.

  1. Roof surveySectioned imagery, close-ups and report evidence
  2. Façade surveyElevation folders and location-referenced image sets
  3. 3D and Revit viewersInteractive model viewing for remote review
  4. Measured surveyExisting third-party drawings kept in the same record
  5. Compliance documentsHistoric documentation, with space for future updates
The result

The client moved from fragmented files and limited visibility of a long-vacant building to a structured digital asset record that supports refurbishment planning, remote decision-making and future updates throughout the building's life.

One visit. Endless insight.

Plan a pre-refurbishment survey →
Planning a refurbishment?

Start with a building record everyone can open

Tell us about the building and who needs to see it. We'll scope the surveys, models and internal capture, and bring your existing drawings and documents into the same portal.

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View an example survey

See exactly what you would receive, before you book.

  • The secure online portal your team would use
  • Roof and façade imagery, organised by section
  • A surveyor's condition report with RAG ratings
  • An interactive 3D model you can measure from
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