What to Know Before Building with Marku & Co. Developments
Considering a high-end home renovation, extension or new build in London? Below are answers to the most common questions our clients ask before starting their projects — so you can plan with clarity and confidence.
General Questions
What type of projects do you specialise in?
We deliver luxury residential construction projects across Central and Greater London, including:
— Full home renovations
— High-end house extensions and loft conversions
— Turnkey new builds
— Bespoke kitchen and bathroom refurbishments
— Period and listed property restorations
We do not undertake commercial works, cosmetic-only refurbishments or low-spec developments.
— Full home renovations
— High-end house extensions and loft conversions
— Turnkey new builds
— Bespoke kitchen and bathroom refurbishments
— Period and listed property restorations
We do not undertake commercial works, cosmetic-only refurbishments or low-spec developments.
Do you work with listed buildings or home in conservation areas?
Yes — it's one of our specialties. We work closely with heritage consultants, conservation officers and planning authorities to ensure all listed buildings or conservation area works meet legal requirements while honouring the property's character.
Can I contact you before I apply for planning permission?
Absolutely. We regularly advice clients before any applications are made. We can help assess feasibility, explore permitted development rights and identify whether your project needs planning permission or falls under building regulations.
Can you work with my architect or designer?
Yes — we frequently collaborate with external professionals. If you don't yet have one, we offer access to in-house architects and interior designers, or can recommend experienced partners for a fully integrated design-and-build service.
Which London areas do you cover?
We work across London's prime neighbourhoods, including:
Chelsea • Kensington • Fulham • Notting Hill • Hampstead • Belgravia • Marylebone • Wimbledon • Knightsbridge • St John's Wood
Chelsea • Kensington • Fulham • Notting Hill • Hampstead • Belgravia • Marylebone • Wimbledon • Knightsbridge • St John's Wood
Process, Timelines & Planning
How long do high-end home renovations or extensions take?
Every build is unique, but typical timeframes are:
— Kitchens: 4 - 8 weeks
— Bathrooms: 3 - 6 weeks
— Full refurbishments: 4 - 6 months
— Loft or rear extensions: 3 - 5 months
— New builds: 9 -14 months
We provide project-specific schedules during the pre-construction phase and update you consistently throughout the build.
— Kitchens: 4 - 8 weeks
— Bathrooms: 3 - 6 weeks
— Full refurbishments: 4 - 6 months
— Loft or rear extensions: 3 - 5 months
— New builds: 9 -14 months
We provide project-specific schedules during the pre-construction phase and update you consistently throughout the build.
Do you offer fixed-price building quotes?
Yes — wherever possible. After the scoping phase, we provide a detailed, fixed-price proposal outlining inclusions, exclusions and allowances. This ensures cost transparency from day one and protects your budget throughout.
Who manages the day-to-day construction work?
You'll have a dedicated project manager overseeing the build — your main point of contact throughout. They handle scheduling, subcontractors, quality control and all communication, ensuring your project runs smoothly and efficiently.
Can I live in my property during the renovation?
It depends on the scale of the works.
— Smaller upgrades (like bathroom or kitchen refurbishments): Often possible with adjustments.
— Full renovations or structural builds: We typically recommend temporary relocation for safety and speed.
We can help source short-term accommodation if needed.
— Smaller upgrades (like bathroom or kitchen refurbishments): Often possible with adjustments.
— Full renovations or structural builds: We typically recommend temporary relocation for safety and speed.
We can help source short-term accommodation if needed.
Materials, Finishes & Design Support
Can you help with finishes, materials and interior design?
Yes. We offer a full interior specification service, helping you select finishes, fittings and furnishings — including access to trade-only suppliers. Whether you're specifying natural stone, choosing micro-cement or furnishing your home, we provide tailored guidance.
What brands do you work with?
We specify and install products from high-performance, design-led brands, including:
— Appliances: Gaggenau, Miele, Sub-Zero, Wolf
— Fixtures & Sanitaryware: VOLA, Dornbracht, Gessi, Boffi
— Surfaces: Calacatta marble, Caesarstone, Dekton, micro-cement
— Smart Systems: Lutron, Control4, Sonos, Quooker
— Appliances: Gaggenau, Miele, Sub-Zero, Wolf
— Fixtures & Sanitaryware: VOLA, Dornbracht, Gessi, Boffi
— Surfaces: Calacatta marble, Caesarstone, Dekton, micro-cement
— Smart Systems: Lutron, Control4, Sonos, Quooker
Do you offer energy-efficient or eco-conscious building solutions?
Yes. Sustainability is integral to our approach. We can integrate:
— MVHR systems
— Solar PV prep and battery storage
— Triple-glazed or heritage sash windows
— Smart heating and cooling systems
— Low-VOC paints and natural insulation
These solutions are implemented without compromising on aesthetics or luxury.
— MVHR systems
— Solar PV prep and battery storage
— Triple-glazed or heritage sash windows
— Smart heating and cooling systems
— Low-VOC paints and natural insulation
These solutions are implemented without compromising on aesthetics or luxury.
Aftercare & Warranties
What kind of warranties do you provide?
All projects include a 12-month defect liability period, plus manufacturer warranties on all installed systems and appliances. For new builds, we can provide 10-year structural warranties (NHBC, Premier Guarantee, etc.) upon request.
What if something goes wrong after handover?
We take post-project care seriously. If any issues arise — cosmetic or mechanical — our team responds quickly and professionally. We also offer optional maintenance packages for ongoing peace of mind.
Can I speak to past clients or see completed homes?
Yes. With prior approval, we can arrange:
— Client references
— Site visits of completed projects
— In-depth case studies with material breakdowns
This helps you experience our craftsmanship and detail firsthand.
— Client references
— Site visits of completed projects
— In-depth case studies with material breakdowns
This helps you experience our craftsmanship and detail firsthand.
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