Case study
BTR Optimization [K38]
EOLOS DESIGN LAB optimized two apartments in the same building for the long-term rental market (Build-to-Rent). The mission was to create a scalable BTR model that maximizes net operating income and sustainability over time through consistent design choices.
Industry: Real estate investment & BTR
Services: Total renovation, Tenant adaptation, Interior architecture
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_01.webp)
Challenge and goal
To transform two outdated units into high-yield investment properties.
- Standardize material selection to lower future maintenance costs (OPEX).
- Maximize living space (BOA) through smarter floor plans and removal of corridors.
- Create an attractive product for long-term, stable tenants with a willingness to pay.
- Increase the rent level through higher perceived standards.
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_08.webp)
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_02.webp)
Solution
A strategy based on ”Systematic Design”. We applied the same high standards and material palette in both units to simplify management.
Concept & Layout
Open social areas for better light flow and space, making the apartments more attractive on the market.
Materials & Surfaces
Durable floors and robust joinery adapted for the rental market, chosen to minimize wear and tear over time.
Energy efficiency
Upgrading windows and insulation in the units for lower energy costs and better indoor climate.
Fixed Interior
Site-built kitchens and storage optimized for function and durability.
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_072.webp)
Results and effectst
The project has delivered measurable results for the property owner:
- Increased Rent Level: Significant increase in rent/square meter after renovation.
- Long-term Sustainability: Material selection that withstands wear and minimizes maintenance requirements.
- Quick Rental: Attractive design that minimizes vacancy risk.
- Effective Management: Standardized solutions make operations easier.
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_05.webp)
“K38 proves that strategic design choices and robust materiality directly drive returns in the rental portfolio.”
— EOLOS DESIGN LAB
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_04.webp)
Highlights
- Scalable BTR design.
- Maintenance-free materials.
- Optimized operating net income.
- High standard of accommodation.
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_03_.webp)
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_06.webp)
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_07.webp)
![BTR Optimization [K38]](https://eolos.se/wp-content/uploads/2026/06/k38_09.webp)
This is a selection of our work. Additional projects, documentation and references can be shared during a private meeting.
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