What ADDITION DESIGN OFFICE LTD does

Addition Design Office Ltd is a privately held UK consultancy incorporated in 2023, operating from Rugby, Warwickshire, with a stated reach across Warwickshire, Northamptonshire, London, and Surrey. The firm operates two distinct service lines under a single engineering umbrella: (1) Addition Aviation Services — bespoke aircraft interior engineering including cabin modification guidance, seat selection analysis, aircraft interior refurbishment, indicative LOPA (Layout of Passenger Accommodation) generation, and project management, and (2) Addition Property Design Services — residential architectural design, planning submissions, structural engineering calculations, building regulations compliance, and project support for extensions, remodeling, new builds, loft and garage conversions across the four UK regions. The technical work is delivered through a four-stage process (Advise, Design, Ensure, Support) and combines architectural, structural, and regulatory expertise in a single integrated package.

The company's core technology is human-delivered design and engineering services rather than a software platform: it produces design drawings, structural calculations, planning portal submissions, and building regulations documentation. There is no proprietary software, no disclosed APIs or integrations, and the digital presence is a Wix-hosted website. The only registered certification is GDPR compliance, documented through a published privacy policy.

The business model is project-based professional services. Acquisition is sales-led and direct-to-client: free onsite consultation, fixed-price quotation within 24 hours, and delivery via phone (01788 316448), email ([email protected] / [email protected]), and onsite visits. Revenue is generated per project rather than via subscriptions or recurring contracts. Marketing is limited to a blog (covering Victorian cottage renovations, design briefs, and planning-phase topics) and social media profiles on Facebook, Twitter, LinkedIn, and Instagram. There are no disclosed funding rounds, institutional investors, parent companies, partnerships, patents, trademarks, awards, or acquisitions; the firm appears to be founder/owner-operated by Chris Latham, who is both the principal designer and the content author for the company blog.

Name

ADDITION DESIGN OFFICE LTD

Legal name

Addition Design Office Ltd

Website

https://adtndesign.com

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

Addition Design Office Ltd is a UK-based consultancy providing aviation cabin interior engineering and residential property design services — extensions, remodeling, building regulations, and planning — to SMB clients across Warwickshire, Northamptonshire, London, and Surrey.

Ownership category

akta.pro rank

Product category

Architectural and Engineering Design Services

NAICS

Interior Design Services (54141), Architectural Services (54131), Other Specialized Design Services (54149)

SIC

Aircraft Parts & Auxiliary Equipment, Nec (3728), Aircraft & Parts (3720)

akta.pro primary industry

Interiors MRO (Cabin Refurbishment & IFE) (IMABALAH)

akta.pro secondary industries

Interior Design Services (BPAHAKAB), Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Second-Story Additions (HSAPADAB)

Keywords

• Aviation cabin engineering
• Residential property design
• Architectural design services
• Building regulations consulting
• Structural engineering consultancy

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Professional Design Services: Project-based consulting fees for bespoke aircraft interior engineering and property design services. Services include design, planning, structural calculations, and project management.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Addition Design Office provides bespoke aviation cabin interior engineering consulting (cabin modification guidance, seat selection analysis, aircraft interior refurbishment, indicative LOPA generation, and project management) and residential property design services (architectural design, planning submissions, structural engineering calculations, building regulations documentation, and builder introduction) for clients in the UK. Services are delivered as integrated, project-based consultancy packages backed by nearly two decades of combined engineering experience.

Product overview

ADDITION DESIGN OFFICE LTD offers two core service lines: Addition Property Design Services and Addition Aviation Services. Property Design encompasses architectural design, planning, structural engineering, building regulations, and construction services with a four-stage process (Advise, Design, Ensure, Support). Aviation Services provides bespoke aircraft interior engineering including cabin modifications, seat selection analysis, refurbishment, and LOPA generation. Both services share a unified engineering approach and project management methodology developed from almost two decades of aerospace and property industry experience.

Differentiator

Problem solved

Functional benefit

Products and services

• Addition Property Design Services Integrated property design package covering architectural design, planning permission submissions, structural engineering calculations, building regulations documentation, and builder introduction. Specialises in extensions, building remodeling, new builds, kitchen extensions, loft conversions, garage conversions, garden rooms, and home offices for residential property owners and developers across Warwickshire, Northamptonshire, London, and Surrey.
• Addition Aviation Services Bespoke aircraft interior engineering service for aviation industry clients, offering cabin modification guidance, seat selection analysis, aircraft interior refurbishment, indicative LOPA generation, and project management. Delivered as a project-based consultancy grounded in nearly two decades of aerospace engineering experience.

Named customers1 record

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves5 records

Expansion highlights3 records

Others

• HomeOwners Alliance: UK consumer platform connecting homeowners with architects, designers, and builders for extensions and renovations — adjacent ecosystem participant that channels demand toward (or away from) boutique firms like Addition.

Broad incumbents

• Foster + Partners: Global UK-headquartered architectural firm offering full-service design across residential, commercial, and aviation-adjacent projects — represents the scaled incumbent that Addition would not realistically compete with on enterprise mandates.

Direct peers

• Teague: US-based design consultancy with a major aviation practice delivering cabin interiors, seat programmes, and IFE concepts for airlines and OEMs — comparable in capability to Addition's aviation offering.
• Acumen Design Associates: Specialist aviation cabin interior design firm providing LOPA, seat selection, and refurbishment support to airlines, lessors, and MROs — closely aligned with Addition's aviation cabin engineering scope.
• Resi: UK home extension design platform offering fixed-price architectural services, planning, and building regulations across the UK — directly competes with Addition's property design service line on price transparency and accessibility.
• PriestmanGoode: London-based design consultancy specialising in aviation and transport interiors, including cabin design, seat concepts, and LOPA work — directly comparable to Addition's aviation cabin engineering offering.
• Design Q: UK-based aviation interior design consultancy focused on cabin concepts, refurbishments, and seat programmes; offers similar LOPA, seat selection, and cabin modification services to Addition's aviation line.
• Tangerine: London-headquartered design consultancy with a long-standing aviation interiors practice covering cabin concepts, IFE, and seat design — a direct competitor for aviation cabin engineering mandates.
• JPA Design: Aviation-focused design consultancy covering cabin interiors, branding, and seat programmes; competes for similar boutique airline and lessor refurbishment advisory work.

Emerging players

• Stirling Mayfield: Small UK architectural practice offering bespoke residential extensions, planning, and building regulations services — comparable in scale and service scope to Addition's property design line.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/Wix
• Facebookfacebook.com/wix
• LinkedInlinkedin.com/company/addition-design-office
• Instagraminstagram.com/wix

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ADDITION DESIGN OFFICE LTD