[Yamagata Prefecture Housing Warranty Survey] Gap of up to 40 Years in Structural and Waterproofing Guarantees; Interest in Long-Term Warranties Grows, 18% of Existing Customers React Immediately to Longest 55-Year Warranty | Create Lemon
Create Lemon's survey of 15 housing companies in Yamagata Prefecture revealed a gap of up to 40 years in structural and waterproofing warranties. Their longest 55-year warranty also saw an 18% response rate from existing customers, highlighting growing interest in long-term housing maintenance.
📋 Article Processing Timeline
- 📰 Published: April 9, 2026 at 19:00
- 🔍 Collected: April 9, 2026 at 10:31
- 🤖 AI Analyzed: April 20, 2026 at 11:12 (264h 41m after Collected)
Create Lemon Inc. (Headquarters: Yamagata City, Yamagata Prefecture, Representative Director CEO: Tomokazu Oba) conducted an "Independent Survey on Housing Warranties" based on publicly available information as of 2025, targeting 15 custom home builders headquartered within Yamagata Prefecture.
The survey revealed a maximum difference of 40 years in structural and waterproofing warranties among the companies. Furthermore, when their "Longest 55-Year Warranty" was offered to existing customers (OB customers), it recorded an extremely high response rate of approximately 18%. This highlights the growing interest not just in "building" a house, but also in "maintaining it for a long time."
▼ Details of the Longest 55-Year Warranty here:
https://createlemon.jp/warranty
■ Survey Background: The "Longevity of Housing" and the Importance of Warranties
Amidst the trend of extending housing lifespan due to rising construction material costs and environmental awareness, interest in "warranty systems" is growing. To maintain residents' Quality of Life (QOL) over the long term, "warranty systems" that cover future repair risks are indispensable, not just the performance at the time of new construction. Against this backdrop, we investigated the current state of housing warranties in Yamagata Prefecture.
■ Independent Survey of 15 Companies in Yamagata Prefecture: Clear "Years of Warranty" Discrepancy
According to Create Lemon's independent survey, the distribution of "structural and waterproofing warranties" and "equipment warranties" among major custom home builders in Yamagata Prefecture is as follows:
### [Structural and Waterproofing Warranty Period Distribution]
* Maximum 60 years: 5 companies
* Maximum 30 years: 3 companies
* Maximum 20 years: 1 company
* Others (10 years, etc.): 6 companies
※ It was found that there is a gap of up to 40 years.
The survey revealed a maximum difference of 40 years in structural and waterproofing warranties among the companies. Furthermore, when their "Longest 55-Year Warranty" was offered to existing customers (OB customers), it recorded an extremely high response rate of approximately 18%. This highlights the growing interest not just in "building" a house, but also in "maintaining it for a long time."
▼ Details of the Longest 55-Year Warranty here:
https://createlemon.jp/warranty
■ Survey Background: The "Longevity of Housing" and the Importance of Warranties
Amidst the trend of extending housing lifespan due to rising construction material costs and environmental awareness, interest in "warranty systems" is growing. To maintain residents' Quality of Life (QOL) over the long term, "warranty systems" that cover future repair risks are indispensable, not just the performance at the time of new construction. Against this backdrop, we investigated the current state of housing warranties in Yamagata Prefecture.
■ Independent Survey of 15 Companies in Yamagata Prefecture: Clear "Years of Warranty" Discrepancy
According to Create Lemon's independent survey, the distribution of "structural and waterproofing warranties" and "equipment warranties" among major custom home builders in Yamagata Prefecture is as follows:
### [Structural and Waterproofing Warranty Period Distribution]
* Maximum 60 years: 5 companies
* Maximum 30 years: 3 companies
* Maximum 20 years: 1 company
* Others (10 years, etc.): 6 companies
※ It was found that there is a gap of up to 40 years.