Common use of Commencement and Permitting of the Tenant Improvements Clause in Contracts

Commencement and Permitting of the Tenant Improvements. Tenant shall, subject to the other provisions of the Lease and this Work Letter, commence construction of the Tenant Improvements upon obtaining and delivering to Landlord a building permit (the “TI Permit”) authorizing the construction of the Tenant Improvements consistent with the TI Construction Drawings approved by Landlord. The cost of obtaining the TI Permit shall be payable from the TI Fund. Landlord shall assist Tenant in obtaining the TI Permit. Prior to the commencement of the Tenant Improvements, Tenant shall deliver to Landlord a copy of any contract with Tenant’s contractors (including the TI Architect), and certificates of insurance from any contractor performing any part of the Tenant Improvement evidencing industry standard commercial general liability, automotive liability, “builder’s risk”, and workers’ compensation insurance. Tenant shall cause the general contractor to provide a certificate of insurance naming Landlord, Alexandria Real Estate Equities, Inc., and Landlord’s lender (if any) as additional insureds for the general contractor’s liability coverages required above. Notwithstanding the foregoing, Tenant shall have no right to enter onto the Premises or the Project unless and until Tenant shall deliver to Landlord evidence reasonably satisfactory to Landlord demonstrating that any insurance reasonably required by Landlord in connection with such pre-commencement access (including, but not limited to, any insurance that Landlord may require pursuant to the Lease) is in full force and effect. Any entry by Tenant and/or any Tenant Party shall comply with all established safety practices of Landlord’s contractor and Landlord until completion of Landlord’s Work.

Commencement and Permitting of the Tenant Improvements. Tenant shall, subject to the other provisions of the Lease and this Work Letter, shall commence construction of the Tenant Improvements upon obtaining and delivering to Landlord a building permit (the “TI Permit”) authorizing the construction of the Tenant Improvements consistent with the TI Construction Drawings approved by Landlord. The cost of obtaining the TI Permit shall shah be payable from the TI Fund. Landlord shall assist Tenant in obtaining the TI Permit. Prior to the commencement of the Tenant Improvements, Tenant shall deliver to Landlord a copy of any contract with Tenant’s contractors (including the TI Architect), and certificates of insurance from any contractor performing any part of the Tenant Improvement evidencing industry standard commercial general liability, automotive liability, “builder’s risk”, and workers’ compensation insurance. Tenant shall cause the general contractor to provide a certificate of insurance naming Landlord, Alexandria Real Estate Equities, Inc., and Landlord’s lender (if any) as additional insureds for the general contractor’s liability coverages required above. Notwithstanding Within 10 days after Landlord’s request (but in no event prior to 22 weeks after the foregoingdate of this Work Letter), Tenant shall have no right to enter onto the Premises or the Project unless at its expense complete and until Tenant shall deliver to Landlord evidence reasonably satisfactory to Landlord demonstrating that submit any insurance reasonably documentation required by Landlord in connection with such pre-commencement access the applicable Governmental Authority (including, but not limited to, any insurance that Landlord may require pursuant the Washington Suburban Sanitary Commission (“WSSC”)) for the issuance of a plumbing authority (or comparable) permit relating to laboratory water and wastewater usage at the Lease) 8000 VIVIR Premises. Such documentation includes, but is in full force and effectnot limited to, an industrial Wastewater Survey on the form specified by WSSC’s Regulatory Services Division, Industrial Discharge Control Section. Any entry by Tenant and/or any Tenant Party shall comply with all established safety practices of At Landlord’s contractor request, Tenant shall also meet with Landlord and Landlord until completion of Landlord’s WorkWSSC personnel at the Project to review cooperatively matters relating to water and wastewater usage, including, but not limited to, laboratory processes.

Commencement and Permitting of the Tenant Improvements. At any time on and after the Turnover Condition Date (as defined in the Landlord Work Letter), Tenant shall, subject or prior to such date as provided in the other provisions of the Lease and this Landlord Work Letter, Tenant may, commence construction of the Tenant Improvements upon obtaining and delivering to Landlord a building permit (the “TI Permit”) authorizing the construction of the Tenant Improvements consistent with the Approved TI Construction Drawings approved by LandlordDrawings. The cost of obtaining the TI Permit shall be payable from the TI FundAllowance. Landlord shall shall, at no cost to Tenant, assist Tenant in obtaining the TI Permit. Prior to the commencement of the Tenant Improvements, Tenant shall deliver to Landlord a copy of any contract (i) enter into with Tenant’s contractors the contracts for the construction and performance of the Tenant Improvements, (including the TI Architect)ii) deliver to Landlord true and complete copies of such executed contracts, and (iii) deliver certificates of insurance from any contractor performing any part of the Tenant Improvement evidencing industry standard commercial general liability, automotive liability, “builder’s risk”, and workers’ compensation insurance. Tenant shall cause the general contractor to provide a certificate of insurance naming Landlord, Alexandria Real Estate Equities, Inc., and Landlord’s lender (if any) as additional insureds for the general contractor’s liability coverages required above. Notwithstanding the foregoingWithin 10 days after Landlord’s written request, Tenant shall have no right to enter onto the Premises or the Project unless at its expense complete and until Tenant shall deliver to Landlord evidence reasonably satisfactory to Landlord demonstrating that submit any insurance reasonably documentation required by Landlord in connection with such pre-commencement access the applicable Governmental Authority (including, but not limited to, any insurance that Landlord may require pursuant the Washington Suburban Sanitary Commission (“WSSC”)) for the issuance of a plumbing authority (or comparable) permit relating to laboratory water and wastewater usage at the Lease) Premises. Such documentation includes, but is in full force and effectnot limited to, an Industrial Wastewater Survey on the form specified by WSSC’s Regulatory Services Division, Industrial Discharge Control Section. Any entry by Tenant and/or any Tenant Party shall comply with all established safety practices of At Landlord’s contractor request, Tenant shall also meet with Landlord and Landlord until completion of Landlord’s Work.WSSC personnel at the Project to review cooperatively matters relating to water and wastewater usage, including, but not limited to, laboratory processes. 21001083-v13 ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇—REGENXBIO INC.—Page 80

Commencement and Permitting of the Tenant Improvements. Following the Weather-Tight Building Shell Delivery Date, Tenant shall, subject to the other provisions of the Lease and this Work Letter, shall commence construction of the Tenant Improvements upon obtaining and delivering to Landlord a building permit (the “TI Permit”) authorizing the construction of the Tenant Improvements consistent with the TI Construction Drawings approved by Landlord. The cost of obtaining the TI Permit shall be payable from the TI FundAllowance. Landlord shall assist Tenant in obtaining the TI Permit. Prior to the commencement of the Tenant Improvements, Tenant shall deliver to Landlord a copy of any contract with Tenant’s contractors (including the TI Architect), and certificates of insurance from any contractor performing any part of the Tenant Improvement evidencing industry standard commercial general liability, automotive liability, “builder’s risk”, and workers’ compensation insurance. Tenant shall cause the general contractor to provide a certificate of insurance naming Landlord, Alexandria Real Estate Equities, Inc., and Landlord’s lender (if any) as additional insureds for the general contractor’s liability coverages required above. Notwithstanding anything to the foregoingcontrary in this Lease, Landlord shall grant Tenant shall have no right and its agents and contractors access to enter onto the Premises for purposes of commencing its construction of the Tenant Improvements therein prior to the Weather-Tight Building Shell Delivery Date so long as such entry does not unreasonably interfere with or delay Landlord’s construction of the Project unless Building Shell and until Tenant shall deliver to Landlord evidence reasonably satisfactory to Landlord demonstrating that any insurance reasonably required by Landlord complies with all of Landlord’s reasonable requirements in connection with such pre-commencement access (including, but not limited to, any insurance that Landlord may require pursuant and all of the other provisions of the Lease and this Work Letter except for the obligation to the Lease) is in full force pay Base Rent and effect. Any entry by Tenant and/or any Tenant Party shall comply with all established safety practices of Landlord’s contractor and Landlord until completion of Landlord’s WorkOperating Expenses.