Making improvements to the look of a leased space is a normal part of getting ready for business. The generic layout and design that comes with such leased space may not fit with a business and must be redesigned to suit the needs of a specific company. Such customization may include redesigning the walls, changing the lighting, or customizing the LAN connections. Before proceeding with such an undertaking, there is always the question as to what alterations can be done on a leased/rented commercial office space. Lease Agreement Allowances Before any improvements are made, the owner should be consulted about any plans to alter existing office space. The best way to handle such a contingency is to be sure that the ability to alter the space is included in the lease agreement before it is signed. If an agreement has already been signed and did not include any details regarding improvements, the express consent - in writing - must be received from the building owner and then the existin...