Document and Entity Information
| Document and Entity Information | May 22, 2024 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001631256 |
| Document Type | 8-K |
| Document Period End Date | May 22, 2024 |
| Entity Registrant Name | KBS GROWTH & INCOME REIT, INC. |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 000-56050 |
| Entity Tax Identification Number | 47-2778257 |
| Entity Address, Address Line One | 800 Newport Center Drive |
| Entity Address, Address Line Two | Suite 700 |
| Entity Address, City or Town | Newport Beach |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92660 |
| City Area Code | (949) |
| Local Phone Number | 417-6500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |