Complex sentence: The Presidential quarters were enlarged on the front along J.P. Laurel, destroying the small garden and driveway leading to the private entrance, while a new dining room and expanded guest suites were built on the main entrance front.
Split into simpler sentences: The Presidential quarters were enlarged on the J.P. Laurel front, eliminating the small garden and driveway leading to the private entrance. A new dining room and expanded guest suites were built on the main entrance front.