Business Details
29 Years
experience
Luxury Interior Design & Architectural Excellence in London
Established in 1997, Callender Howorth has emerged as a leader in luxury interior design and architectural services, delivering bespoke solutions across the UK, Europe, and North America. Our multidisciplinary team of award-winning designers and architects specialises in transforming residential and commercial spaces, combining creative vision with meticulous project management. With over 25 years of experience, we have cultivated a reputation for excellence through projects ranging from historic London townhouses to contemporary villas on the French Riviera. Our approach prioritises client collaboration, ensuring each design reflects individual lifestyles while integrating cutting-edge technology and sustainable practices. Headquartered in London, we maintain a global presence with offices in New York and a dedicated English-speaking build team in the Cte dAzur.Our commitment to innovation is underscored by in-house stylists who curate the latest global design trends and materials. Every project benefits from dedicated project managers who guarantee adherence to timelines and budgets without compromising on quality. This client-centric philosophy has fostered long-term relationships and repeat commissions from discerning clients worldwide. Our expertise extends to luxury renovations, interior architecture, and smart home integration, positioning us at the forefront of the industry. This enduring dedication to craftsmanship, functionality, and aesthetic excellence continues to define our work as we celebrate over a quarter-century of transformative design.
Services
Interior Design
Architectural Design
Luxury Renovations
Project Management
Smart Home Integration
Details
- Year established: 1997
Highlights and features
- We have over 25 years of experience in luxury interior design and architectural projects.
- Our award-winning multidisciplinary team delivers bespoke, client-focused solutions globally.
- In-house stylists source exclusive global materials and design elements.
- We lead in smart home technology integration for modern luxury spaces.
- Dedicated project managers ensure all projects complete on time and within budget.
What people say
Renovation went smoothly
Quirky design ideas
Perfect villa transformation
Rose-fuelled meetings
Services
Interior Design
Our interior design service creates bespoke spaces that reflect individual client personalities and lifestyles. Combining artistic vision with functional planning, we curate premium materials and innovative layouts to transform residential and commercial properties. With global expertise spanning London, Paris, and Los Angeles, we deliver timeless elegance through tailored colour schemes, lighting solutions, and custom furnishings.
Architectural Design
Specialising in luxury architectural design, we reimagine spaces through structural transformations and modern adaptations. Our team integrates historical preservation with contemporary elements, creating harmonious layouts that enhance property value and functionality. Projects range from listed London townhouses to avant-garde Manhattan penthouses, always maintaining strict budget and timeline controls.
Luxury Renovations
We execute comprehensive renovations that balance aesthetic enhancement with technical precision. Our process includes spatial reconfiguration, material selection, and smart technology integration while preserving architectural integrity. From Cte dAzur villas to Essex mansions, each project receives meticulous attention to detail through dedicated project management teams ensuring seamless execution.
Project Management
Our full-service project management guarantees timely and budget-conscious delivery across international locations. Coordinating all aspects from concept to completion, we provide transparent communication and quality control for complex renovations. This service ensures cohesive implementation of design visions while addressing logistical challenges inherent in luxury property transformations.
Smart Home Integration
We incorporate cutting-edge smart home systems that enhance comfort and security without compromising aesthetic appeal. Our specialists integrate automation, audio-visual equipment, and energy-efficient technologies seamlessly into luxury interiors. This service transforms living spaces into technologically advanced environments while maintaining the sophisticated design language our clients expect.
People
Mark Howorth
Founder & Lead Designer
Award-winning interior designer with 25+ years experience, established Callender Howorth in 1997. Recognised for blending British tradition with modern elegance across global projects from London to California.
Questions
What areas do you serve for interior design projects?
We operate across the UK, Europe (particularly Paris and the Côte d’Azur), and North America with dedicated teams in London and New York.
What types of properties do you specialise in?
We handle luxury residential projects including villas, townhouses, and penthouses, as well as commercial spaces requiring bespoke design solutions.
How do you ensure project timelines are met?
Dedicated project managers oversee every assignment, implementing strict scheduling controls and regular progress monitoring to guarantee timely completion.
Can you incorporate smart home technology into designs?
Yes, we specialise in integrating advanced smart home systems including automation, security, and entertainment solutions while maintaining aesthetic cohesion.
What makes your design approach unique?
Our combination of in-house stylists, architectural expertise, and global material sourcing creates distinctive spaces that reflect client personalities rather than generic trends.
How do you handle international projects?
We maintain an English-speaking build team in the Côte d’Azur and a full design office in New York to support seamless execution across different time zones and regulations.
