<P> The subsequent competition for the reconstruction of the Palace was won by the architect Charles Barry , whose design was for new buildings in the Gothic Revival style , specifically inspired by the English Perpendicular Gothic style of the 14th -- 16th centuries . The remains of the Old Palace ( except the detached Jewel Tower ) were incorporated into its much larger replacement , which contains over 1,100 rooms organised symmetrically around two series of courtyards and has a floor area of 112,476 m ( 1,210,680 sq ft ) . Part of the New Palace 's area of 3.24 hectares ( 8 acres ) was reclaimed from the Thames , which is the setting of its nearly 300 - metre long ( 980 ft ) façade , called the River Front . Barry was assisted by Augustus Pugin , a leading authority on Gothic architecture and style , who designed the interior of the Palace . Construction started in 1840 and lasted for 30 years , suffering great delays and cost overruns , as well as the death of both leading architects ; works for the interior decoration continued intermittently well into the 20th century . Major conservation work has been carried out since then to reverse the effects of London 's air pollution , and extensive repairs took place after the Second World War , including the reconstruction of the Commons Chamber following its bombing in 1941 . </P>
<P> The subsequent competition for the reconstruction of the Palace was won by the architect Charles Barry , whose design was for new buildings in the Gothic Revival style , specifically inspired by the English Perpendicular Gothic style of the 14th -- 16th centuries . The remains of the Old Palace ( except the detached Jewel Tower ) were incorporated into its much larger replacement , which contains over 1,100 rooms organised symmetrically around two series of courtyards and has a floor area of 112,476 m ( 1,210,680 sq ft ) . Part of the New Palace 's area of 3.24 hectares ( 8 acres ) was reclaimed from the Thames , which is the setting of its nearly 300 - metre long ( 980 ft ) façade , called the River Front . Barry was assisted by Augustus Pugin , a leading authority on Gothic architecture and style , who designed the interior of the Palace . Construction started in 1840 and lasted for 30 years , suffering great delays and cost overruns , as well as the death of both leading architects ; works for the interior decoration continued intermittently well into the 20th century . Major conservation work has been carried out since then to reverse the effects of London 's air pollution , and extensive repairs took place after the Second World War , including the reconstruction of the Commons Chamber following its bombing in 1941 . </P>
how many rooms in the houses of parliament
how many rooms in the houses of parliament
1,100
1,100