Andrew and Mary are qualified architects and property investors with over 20 years of combined experience delivering high-end residential projects. With a track record spanning luxury homes and investment properties, they now specialise in designing HMOs and buy-to-lets that maximise space, appeal to tenants, and increase rental returns. In our latest podcast episode, they share actionable tips for investors looking to avoid costly design mistakes and create properties that stand out in a crowded rental market.
Common design mistakes that are costing you rent
When it comes to HMOs and buy-to-let properties, layout and design mistakes can be the reason you’re not filling your rooms. Andrew and Mary emphasise thinking like the tenant: how will they use the space, and what first impression will they get when they walk in?
- Focal walls matter. A well-placed feature wall can immediately create “wow appeal” without adding extra cost.
- Open-plan communal spaces. Tenants want social areas that feel generous and inviting, perfect for shared living in HMOs.
- Practical details make a difference. Things like not placing light switches behind the door, ensuring doors don’t block access, or making kitchens and bathrooms functional can dramatically improve tenant satisfaction.
By avoiding these common mistakes, landlords can increase occupancy rates, attract higher-quality tenants, and boost long-term returns.


Trends to follow and those to avoid
Staying current with property and interior design trends is key, but it’s also important not to get caught up in short-lived fads. Andrew and Mary warn that certain styles will date quickly, impacting tenant appeal and resale value.
- Trendy colours like walnut may soon be outdated. Stick to timeless finishes that feel modern but won’t feel tired in a few years.
- Focus on durability and usability. While a bold statement might look great in photos, tenants ultimately value functional, low-maintenance spaces.
By combining timeless design choices with careful trend selection, investors can ensure their HMOs and buy-to-lets stay appealing for years.



Maximising space and avoiding emotional design decisions
Investors often fall into the trap of designing a property as if they were going to live there, which can inflate costs without increasing rental returns. Andrew and Mary stress the importance of thinking like a tenant and designing efficiently:
- Maximise usable space. Clever storage, well-planned layouts, and multifunctional rooms create a sense of spaciousness without expensive renovations.
- Avoid emotional over-specification. Focus on finishes and layouts that tenants appreciate, rather than what would suit your personal taste.
- Create communal “social hubs.” Shared areas like living rooms and kitchens should feel open and sociable, which drives tenant satisfaction and referrals.
These practical strategies help landlords design HMOs and buy-to-lets that are functional, attractive, and profitable.
Want to hear Andrew and Mary break down their tips in detail, including how to assess deal potential and create properties tenants can’t resist? Listen to the full podcast episode here and start designing smarter today.



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