Not a giant fan of windows behind the range, but it is what it is...so...most exhaust fan manufacturers and range manufacturers have determined the required air flow (cubic feet per minute - CFM) as well as the optimum distance from top of cooking surface to bottom of hood. Start by checking the specifications for CFM and distance from cooktop with the range manufacturer. Not sure of your location, but here in the States the IRC requires exhaust fans for kitchen, bath and laundry. Some areas, although they have adopted the Code, do not enforce it. But if broiling pork chops ever happens at your place...you sort of want it.

My downdraft is great with outside motor so not too noisy. Having said that I would also have been happy with a ceiling extractor if I had the space above for the venting.

I agree with havingfun, thicken the supports and have something growing trailing up them. I didn't even notice there was a pergola until the close up. Right now it blends in too well with the house color, consider painting it a different color. I don't know your usda zone but classic climbers for a pergola include clematis, wisteria, grape https://www.houzz.com/photos/santa-ynez-valley-mediterranean-porch-santa-barbara-phvw-vp~2485412 or go for a modern look You can also hang string lights, planters or something from the beams. Also agree lighten the front door.

Hi there! Based on what you've shared, it seems like you're facing a dilemma when it comes to the placement of your bathroom and laundry. If natural light and ventilation are a concern, I would recommend considering the use of highlight glazing in both rooms. By doing so, you can allow natural light to filter through both spaces, and the laundry's internal windows could provide additional light to the hallway. However, without seeing more of the floor plan and understanding the adjacent spaces, it's difficult to make more specific recommendations. While external windows are ideal for wet areas, it's not always feasible to add them to every room. But, there are other solutions to consider, such as frosted glazing in internal doors, that can still provide some level of natural light. Ultimately, I suggest consulting with a design professional to help you weigh your options and find a solution that works best for your needs and preferences. Good luck with your project!