BIM-Based Building Renovation

BIM-Based Renovation of Administrative Building

Chemijos St. 4 – Kaunas​​​​​​​

🟡 Project Summary

This project demonstrates a BIM-based renovation workflow applied to an existing administrative building in Kaunas, Lithuania.

Using Autodesk Revit, Autodesk Navisworks, and Dynamo with Python, the coordination process identified 2927 clashes, which were reduced by 29% through automated clash resolution workflows.

The BIM model was further used for construction planning, cost estimation, and financial feasibility analysis, confirming the project viability with IRR 10%, ROI 51.3%, and Benefit/Cost ratio of 1.5.

🔵 Introduction

Renovation project converting an administrative building into a mixed-use development with commercial and residential units using BIM workflows.

Tools : Autodesk Revit - Autodesk Navisworks - Dynamo for Revit - Python - Twinmotion - ArcGIS

🔵 Project Objectives

Project goals included:

1- Adaptive reuse of an underutilized administrative building

2- Mixed-use development (commercial + residential)

3- Achieving energy efficiency class A++

4- Integration of green spaces and community facilities

5- Ensuring financial feasibility of the project

🟣 Site Analysis

Site analysis of the project area in Kaunas using GIS tools to identify surrounding infrastructure, access roads, and nearby facilities.

The building is located in an urban area with good connectivity to residential zones and public transportation.

🟢 Architectural Design

The design converts the existing administrative building into a mixed-use development.

The ground floor is dedicated to commercial spaces, while the upper floors contain residential studio apartments arranged around a central corridor.

🟡 BIM Modeling

A detailed BIM model was developed using Revit to represent the architectural layout, spatial organization, and building components.

The model served as the foundation for coordination, quantity takeoff, and project analysis.

🟠 Clash Detection

Model coordination was performed using Navisworks to detect conflicts between building components.

Clash detection helped identify potential construction issues early and improve design coordination

Initial clashes detected: 2927

🔴 BIM Automation

Developed a Dynamo + Python automation workflow to process clash detection results and assist in clash resolution, and to reduce manual coordination effort and accelerate clash review.

Initial clashes: 2927Clashes after optimization: 2068Reduction: 29%

🔵 4D Planning

Project schedule developed using Microsoft Project including:

• Work Breakdown Structure (WBS)• Task dependencies and sequencing• Labor allocation• Public holidays and working calendars• Salary and resource cost calculations

The schedule integrates project duration, workforce planning, and financial implications of labor costs.

🟣 Cost Estimation

Material quantities were extracted from the BIM model to generate construction cost estimates.

The analysis included building components such as walls, doors, windows, structural elements, and site works.

🟢 Financial Analysis

Project financial evaluation included construction costs, demolition and renovation works, materials and labor, marketing expenses, risk management allocation, and bank financing.

Key Results

IRR: 10%ROI: 51.3%Benefit / Cost Ratio: 1.5

The analysis confirmed the financial viability of the proposed development.

Unit prices were determined using a multi-criteria evaluation based on market price per square meter, floor level, view quality, and unit characteristics.

Visualization

Architectural visualization created using Twinmotion to present the final design proposal and illustrate the building after renovation.

Full project documentation available upon request

Developed as part of the Construction Management Master’s Program at Kaunas University of Technology(KTU).