How to increase your property’s value through design: expert advice for international investors
Why interior design matters for investors
A prime location and good structure are essential — but they won’t maximise your returns without smart, strategic design. Whether you plan to rent your property or sell it at a premium, interior design has a direct impact on speed, price, and appeal.
In this episode of Homely Property Chats, Magdalena speaks with interior designer Bárbara Siegfried of Siegfried Interiorismo, known for her turnkey renovation projects across Spain. With a special focus on functionality, light, and Mediterranean charm, Bárbara works with international investors to unlock the hidden value of even the most ordinary spaces.
Design isn’t just an expense — it’s an investment that pays off in faster sales, higher rental yields, and happier tenants.
Watch the full interview on YouTube
The three must-have elements of a high-performing home
If you're wondering where to start with your renovation, focus on these three elements:
Warm, layered lighting: It transforms a space, making it feel inviting and homely — even if the layout is simple.
Functional layout: A well-distributed space improves usability and makes even small properties feel spacious.
Proportional furniture: Oversized or poorly placed furniture instantly ruins flow and comfort.
“Lighting… must be functional and warm. This is basic.”
Homes that incorporate these features rent and sell more quickly — and command higher prices.
Light and orientation: the deal-breakers
When it comes to Spanish properties, natural light is one of your biggest assets. According to Bárbara, southwest-facing homes offer the best light exposure throughout the day, making them more attractive to buyers and renters alike.
“A home with light and without light, for me… It’s double the price.”
If you’re considering a darker property, be prepared to work harder to create brightness using mirrors, lighting plans, and layout changes. But where possible, prioritise orientation and daylight — it’s a non-negotiable for many international clients.
Mediterranean design that adds instant appeal
Design that reflects the local climate and culture resonates most with today’s buyers and renters. Mediterranean styling is both timeless and highly sought-after, especially among international investors looking for a coastal or holiday-home vibe.
Top design tips for a Mediterranean look:
Materials: Use clay, ceramics, cotton, and linen — they’re breathable and natural.
Colours: Soft neutrals like beige and sand, with accents of sea blue, olive green, and warm yellows.
Textures: Incorporate natural fibres and wood for a relaxed, elegant finish.
“In short: blue, green, sand and yellow… the colour of the sun.”
The result is a home that feels calming, fresh, and undeniably Spanish — perfect for both short-term guests and long-term residents.
Budgeting for a smart renovation
Not every project requires a full structural overhaul. If the bones are good, a simple facelift can make a world of difference — and often for less than investors expect.
A typical light renovation for a two-bedroom apartment starts from €30,000, depending on materials and finishes. This covers:
Kitchen upgrade: around €10,000
Bathroom renovation: approx. €6,000
Furniture and styling: functional pieces that are both affordable and stylish
You don’t need a luxury budget to create an inviting, high-yield space. Mixing well-chosen IKEA items with a few bespoke or design pieces can deliver fantastic results.
Where to invest: kitchens, bathrooms and layout
Buyers and renters consistently focus on kitchens and bathrooms — so they should take priority in any budget. These rooms are more expensive to renovate, but they offer a high return on investment.
“Kitchen and bathroom are… the rooms of the home that are going to take the most part of the budget.”
Additionally, Bárbara emphasises the importance of redistributing space to maximise light and function. Even a small flat can feel luxurious with the right layout.
How do remote turnkey projects work?
Worried about managing a renovation from abroad? Bárbara’s turnkey service is designed for international investors who want a seamless, reliable process — without being on-site.
Her process includes:
An in-depth consultation to understand your goals and budget
Visual plans and moodboards tailored to your project
Pre-selected furniture and materials for you to approve
Video calls for feedback and updates
Full coordination of local contractors and construction partners
“In business, clients only have to worry about letting me know their needs and budget, and I'm taking care of the rest.”
Clear communication and real-time visual updates help keep the project on track — and stress-free.
Instagram @siegfried_interiorismo
Personal homes vs. investment properties: the design difference
Designing a personal home requires an entirely different approach to styling an investment property. For private homes, Bárbara dives deep into the owners’ lifestyle, habits, and preferences. Everything is tailored — from how they cook to how they unwind.
For investment properties, the focus shifts. The design is based on market needs and future tenants or guests.
“You're going to design, bearing in mind the use of that home.”
From co-living units to luxury short lets, each use-case demands a different layout, finish, and furnishing style.
Why choose Bárbara Siegfried?
Bárbara has completed full-scale renovations across Madrid, Valencia, Costa Brava and Alicante, with a special focus on creating beautiful spaces that perform.
Her standout projects include:
A converted farmhouse near Madrid that’s now featured in ads for Zara Home, Elle, and McDonald’s
Coastal properties transformed into relaxing Mediterranean escapes
Inner-city apartments turned into profitable short-term rentals
“For me it's not the size, it's the cosiness of your home.”
Her approach is rooted in function, light, and warmth — creating spaces that are not only beautiful but make financial sense.
🎬 Step inside Bárbara’s beautifully redesigned ho me in Madrid – watch the full video!
Final thoughts
If you’re investing in Spain, don’t overlook the power of interior design. A thoughtfully designed home — with the right light, layout and finishes — will always rent or sell faster, and often at a better price.
At Homely Valencia, we connect investors with top-tier professionals like Bárbara who understand both international expectations and local execution. Whether you're transforming a holiday flat or preparing a long-term rental, the right design decisions will boost your return.
Ready to design your Spanish property?
📩 Contact us today to book a free consultation.
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