It is a big house, and it would be difficult to remove the arches and make a neat job of the brickwork where it has been cut square. This means that if you do remove the arches you will need to render to disguise the cuts and any new brickwork.

If you do go down this track don't compromise and just render the front facade, as it appears the end of the house is fairly exposed to the street and will need to be rendered as well. The main issue is the brickwork which doesn't have much visual appeal.

If you would like your home to stand-out, and not look like other homes of the period that have been modernised, consider working with what you have, and embracing a contemporary spainish mission style. This would involve not removing the arches, and bagging the brickwork (which is cheaper than render), introducing some wrought iron elements in external lighting, balustrading, and landscaping with succulants and palms. The photo below is a bagged wall where the colour of the brick is disguised by a thin layer, but the outline of the brick can still be seen, whereas a render coat is a lot thicker, with a smoother finish, and completely conceals the brickwork.

Emperors Gate, South Kensington, London · More Info

Your house is large enough to carry off a Spainish Mission makeover (it is already half-way there). If you are not familiar with this style it was used a lot in Hollywood in the 1930's, and there are lots of examples on Houzz if you do a search for Spainish Mission. While a contemporary Spainish Mission makeover is not to popular modern taste it is going to be very much cheaper, a lot more distinctive, conceal that unfortunate brickwork, and give your house a big lift.

Spanish Oaks Hacienda · More Info

Best of luck with whatever direction you decide,

Dr Retro

Lake Home Exterior · More Info