Approximately 60% of Detached House Owners Express Dissatisfaction with Summer Heat and Winter Cold; What Housing Performance is Important for Reducing Utility Costs?

Is Your Home Okay with Summer Heat and Winter Cold Problems?

When choosing a home, people tend to focus on location, design, and price. However, "insulation performance" greatly influences comfort after you start living there.

In recent years, severe summer heat and winter cold have continued, increasing reliance on air conditioners. Consequently, many people are concerned about the burden of utility costs.

Therefore, in collaboration with Cuore Home Co., Ltd., we conducted a survey targeting 400 men and women nationwide who answered in a preliminary survey that they "currently live in a detached house they own" regarding "Housing Insulation Performance and Indoor Comfort."

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**"Housing Insulation Performance and Indoor Comfort Survey" Overview**

**Survey Method: Internet-based questionnaire**

**Survey Period: March 10, 2026 – March 25, 2026**

**Survey Target: Nationwide men and women who answered in a preliminary survey that they "currently live in a detached house they own."

**Valid Responses: 400 samples**

**Questionnaire Content:**

**Question 1: Have you ever felt dissatisfied with "summer heat" or "winter cold" in your current home?**

**Question 2: Specifically, in what situations do you feel dissatisfied?**

**Question 3: How much did you research (or plan to research) the insulation performance of your home before purchasing (or before moving in)?**

**Question 4: Please tell us the reason.**

**Question 5: What image do you have of "high-airtightness, high-insulation homes"? (Multiple answers possible)**

**Question 6: What points do you want to prioritize in terms of housing performance to reduce utility costs? (Multiple answers possible)**

*In principle, values are rounded to the second decimal place, so the total may not be 100%.

Keywords: Survey, Questionnaire, Custom-built homes, Detached houses, Housing performance, Utility costs, Insulation performance, High airtightness, High insulation