# EXHIBIT 31.1

CERTIFICATION
Pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, William B. Dockser, certify that:

| | 1. | I have reviewed this quarterly report on Form 10-QSB for the quarter ended
               March 31, 2007, of CAPITAL REALTY INVESTORS-IV LIMITED PARTNERSHIP;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 2. | Based on my knowledge, this report does not contain any untrue statement of a
               material fact or omit to state a material fact necessary to make the statements
               made, in light of the circumstances under which such statements were made, not
               misleading with respect to the period covered by this report;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 3. | Based on my knowledge, the financial statements and other financial information
               included in this report, fairly present in all material respects the financial
               condition, results of operations and cash flows of the small business issuer as
               of, and for, the periods presented in this report;
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 4. | The small business issuers other certifying officer and I are responsible
               for establishing and maintaining disclosure controls and procedures (as defined
               in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the small business issuer and
               have:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | a) | Designed such disclosure controls and procedures, or caused such disclosure
                    controls and procedures to be designed under our supervision, to ensure that
                    material information relating to the small business issuer, including its
                    consolidated subsidiaries, is made known to us by others within those entities,
                    particularly during the period in which this report is being prepared;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | b) | Evaluated the effectiveness of the small business issuers disclosure
                    controls and procedures and presented in this report our conclusions about the
                    effectiveness of the disclosure controls and procedures, as of the end of the
                    period covered by this report based on such evaluation; and
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | c) | Disclosed in this report any change in the small business issuers internal
                    control over financial reporting that occurred during the small business
                    issuers most recent fiscal quarter (the small business issuers
                    fourth fiscal quarter in the case of an annual report) that has materially
                    affected, or is reasonably likely to materially affect, the small business
                    issuers internal control over financial reporting; and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | 5. | The small business issuers other certifying officer and I have disclosed,
               based on our most recent evaluation of internal control over financial
               reporting, to the small business issuers auditors and the audit committee
               of small business issuers board of directors (or persons performing the
               equivalent functions):
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | a) | All significant deficiencies and material weaknesses in the design or operation
                    of internal control over financial reporting which are reasonably likely to
                    adversely affect the small business issuers ability to record, process,
                    summarize and report financial information; and
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | b) | Any fraud, whether or not material, that involves management or other employees
                    who have a significant role in the small business issuers internal
                    controls over financial reporting.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|             |  | CAPITAL REALTY INVESTORS-IV LIMITED
      PARTNERSHIP                                                                                                       
|------------ |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------
|             |  | (Small Business Issuer)                                                                                                                                     
|             |  |                                                                                                                                                             
|             |  | by:  C.R.I., Inc.                                                                                                                                           
|             |  | Managing General Partner                                                                                                                                    
|             |  |                                                                                                                                                             
|May 11, 2007 |  | by:   /s/ William B. Dockser                                                                                                                                
|DATE         |  | William B. Dockser,
                    Director, Chairman of the Board,
                    and Treasurer
                    (Principal Executive Officer)

This
certification is made solely for purpose of 18 U.S.C. Section 1350, subject to the
knowledge standard contained therein, and not for any other purpose.



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# EXHIBIT 31.2

CERTIFICATION
Pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, H. William Willoughby, certify that:

| | 1. | I have reviewed this quarterly report on Form 10-QSB for the quarter ended
               March 31, 2007, of CAPITAL REALTY INVESTORS-IV LIMITED PARTNERSHIP;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 2. | Based on my knowledge, this report does not contain any untrue statement of a
               material fact or omit to state a material fact necessary to make the statements
               made, in light of the circumstances under which such statements were made, not
               misleading with respect to the period covered by this report;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 3. | Based on my knowledge, the financial statements and other financial information
               included in this report, fairly present in all material respects the financial
               condition, results of operations and cash flows of the small business issuer as
               of, and for, the periods presented in this report;
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 4. | The small business issuers other certifying officer and I are responsible
               for establishing and maintaining disclosure controls and procedures (as defined
               in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the small business issuer and
               have:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | a) | Designed such disclosure controls and procedures, or caused such disclosure
                    controls and procedures to be designed under our supervision, to ensure that
                    material information relating to the small business issuer, including its
                    consolidated subsidiaries, is made known to us by others within those entities,
                    particularly during the period in which this report is being prepared;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | b) | Evaluated the effectiveness of the small business issuers disclosure
                    controls and procedures and presented in this report our conclusions about the
                    effectiveness of the disclosure controls and procedures, as of the end of the
                    period covered by this report based on such evaluation; and
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | c) | Disclosed in this report any change in the small business issuers internal
                    control over financial reporting that occurred during the small business
                    issuers most recent fiscal quarter (the small business issuers
                    fourth fiscal quarter in the case of an annual report) that has materially
                    affected, or is reasonably likely to materially affect, the small business
                    issuers internal control over financial reporting; and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---

| | 5. | The small business issuers other certifying officer and I have disclosed,
               based on our most recent evaluation of internal control over financial
               reporting, to the small business issuers auditors and the audit committee
               of small business issuers board of directors (or persons performing the
               equivalent functions):
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | a) | All significant deficiencies and material weaknesses in the design or operation
                    of internal control over financial reporting which are reasonably likely to
                    adversely affect the small business issuers ability to record, process,
                    summarize and report financial information; and
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | b) | Any fraud, whether or not material, that involves management or other employees
                    who have a significant role in the small business issuers internal
                    controls over financial reporting.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|             |  | CAPITAL REALTY INVESTORS-IV LIMITED
      PARTNERSHIP                                                                                                                          
|------------ |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|             |  | (Small Business Issuer)                                                                                                                                                        
|             |  |                                                                                                                                                                                
|             |  | by:  C.R.I., Inc.                                                                                                                                                              
|             |  | Managing General Partner                                                                                                                                                       
|             |  |                                                                                                                                                                                
|May 11, 2007 |  | by:   /s/ H. William Willoughby                                                                                                                                                
|DATE         |  | H. William Willoughby,
                    Director, President, Secretary,
                    Principal Financial Officer and
                    Principal Accounting Officer

This
certification is made solely for purpose of 18 U.S.C. Section 1350, subject to the
knowledge standard contained therein, and not for any other purpose.