Approximately 28% of custom home buyers experienced a significant difference between estimates and total costs; about 87% had a difference of over 1 million yen.

■ Do you know what the final price of a custom-built home will be?

While custom-built homes offer the appeal of freely designing layouts and specifications, they are also a purchase where it is difficult to grasp the final total cost.

The amount stated in the estimate and the amount actually paid.

For those who are about to build a house, it is probably a point of concern that these two amounts do not always match.

It is not uncommon for additional expenses that are hard to see before signing a contract, such as optional costs, various fees, and extra construction work, to accumulate, causing the final total to inflate.

Therefore, we (NEXER Co., Ltd.), in collaboration with Quore-Home Co., Ltd., conducted a survey on "Price and Cost Transparency of Custom Homes" targeting 140 men and women nationwide who responded in a preliminary survey that they had "purchased a custom home."

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"Survey on 'Price and Cost Transparency' of Custom Homes" Overview

Survey method: Online questionnaire

Survey period: April 7, 2026 - April 15, 2026

Target respondents: Men and women nationwide who responded in a preliminary survey that they had "purchased a custom home."

Valid responses: 140 samples

Questions:

Question 1: When considering a custom home, what was your biggest concern regarding pricing?

Question 2: At the time of home purchase, have you ever experienced the final total cost differing significantly from the initial estimate?

Question 3: How much was the difference?

Question 4: To what extent do you value "transparency" in a housing company's pricing system?

Question 5: Does having optional costs clearly presented before the contract increase your sense of security?

Question 6: Please tell us why.

*As a general rule, percentages are rounded to one decimal place, so the total may not always be 100%.

■ 27.1% responded that their biggest concern regarding pricing was "the possibility of additional costs arising."

First, we asked about their biggest concern regarding pricing when considering a custom home.

The most common answer was "the possibility of additional costs arising" at 27.1%.

This was followed by "difficulty in seeing the total amount" at 22.9%, and "not knowing how much optional costs would be needed" at 12.1%.

The top three items all relate to anxieties about "unseen costs," totaling over 60%.

It can be seen that concerns about additional costs and options that cannot be fully grasped at the estimate stage are major worries when considering a custom home.

■ 27.9% responded that they "have experienced the final total cost differing significantly from the initial estimate."

Next, we asked if they had ever experienced the final total cost differing significantly from the initial estimate at the time of home purchase.

As a result, 27.9% answered "yes" and 72.1% answered "no."

While the majority said "no," a certain number of people experienced costs that could not be fully anticipated at the estimate stage.

■ 46.2% responded that the difference from the estimate was "less than 1 million to 3 million yen."

Next, for those who experienced a difference from the estimate, we asked how much that difference was.

The most common answer was "less than 1 million to 3 million yen" at 46.2%.

This was followed by "less than 3 million to 5 million yen" at 30.8%, "less than 1 million yen" at 12.8%, and "less than 5 million to 10 million yen" at 10.3%.

Those who experienced a difference of 1 million yen or more totaled 87.3%.

It is clear that many who felt a discrepancy between the estimate and the actual total cost experienced a not-insignificant amount of deviation.

■ 66.4% responded that they "very much value" transparency in a housing company's pricing system.

Next, we asked to what extent they value "transparency" in a housing company's pricing system.

As a result, "very much value" was the most common answer at 66.4%, followed by "somewhat value" at 30.0%, and "not very much value" at 3.6%.

Combining "very much value" and "somewhat value" totals 96.4%, showing that almost everyone values price transparency. Against the backdrop of anxiety about additional costs and estimate discrepancies, clear pricing is considered an important criterion for choosing a housing company.

■ 63.6% responded that "a clear presentation of optional costs before the contract greatly increases a sense of security."

Finally, we asked if a clear presentation of optional costs before the contract would increase their sense of security.