What Rønnow Arkitekters does

Rønnow Arkitekter A/S is a privately held Danish architectural practice founded in 1970 (originally as Karsten Rønnows Tegnestue) and headquartered at Ny Kongensgade in Copenhagen. The firm specializes in heritage conservation, restoration, transformation, and sustainable building practices, with ~30 employees as of 2019. Its core technical competencies include color archaeology (farvearkæologi), building condition surveys, cultural environment assessment using SAVE/KIP/SAK methodologies, and the proprietary 'Bæredygtig Byggeskik' framework connecting heritage preservation with sustainability principles, formalized in a 2018 published book.

The firm generates revenue through project-based architectural consultancy fees, acquired via competitive public tenders, multi-year framework agreements (rammeaftaler), and invited architectural competitions. Its primary clients are Danish public-sector and institutional bodies: Bygningsstyrelsen (Royal Building Inspectorate contracts covering 2 of 4 inspektorater since 1982), Kirkeministeriet and Danish church authorities, universities and professional colleges (UCSJ, CBS, Professionshøjskolen Absalon), municipalities (Viborg Kommune), cultural institutions (Det Kongelige Teater, Museum Sydøstdanmark), and social housing associations (AAB). Notable projects include the Holmegaard Værk transformation (Nordens største museum for glas, keramik og design, 2020) and the Retten i Aarhus conversion of Hack Kampmann's former State Library (2021, Snedkerprisen winner). In July 2021 the firm established a joint studio, RØNNOW LETH & GORI, with peer firm LETH & GORI.

The go-to-market is enterprise B2B with no consumer-facing distribution; channels are direct consulting engagement, invited competitions, and professional network referrals. The firm is led by three partners (Camilla Løntoft Nybye, Inge-Lise Kragh, Mette Prip Bonné), with Martin Bloch as CEO and Lisbeth Knudsen as board chair of the joint entity.

Name

Rønnow Arkitekters

Legal name

Rønnow Arkitekter A/S

Website

https://ronnowarkitekter.dk

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

11–50 employees

Short description

Rønnow Arkitekter A/S is a ~30-person Danish architectural practice founded in 1970, specializing in heritage conservation, restoration, and transformation for Danish public-sector and institutional clients, holding 2 of 4 Royal Building Inspectorate contracts since 1982.

Ownership category

akta.pro rank

Product category

Heritage Architectural Services

NAICS

Architectural Services (54131)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Historic Preservation & Conservation Planning (BPAHAKAH)

Keywords

• Heritage architecture services
• Building restoration consultancy
• Cultural heritage conservation
• Sustainable building design
• Adaptive reuse architecture

Headquarters

HQ city

Københoved

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Architectural and Restoration Consultancy: Rønnow Arkitekter generates revenue through project-based architectural consultancy fees on restoration, renovation, transformation, and new-build projects for public and institutional clients. Revenue is earned as fees for architectural services across project phases — from initial surveys, building condition assessments, and master planning through to full design, tender, and construction administration on heritage projects. Work is acquired through public tenders, framework agreements (rammeaftaler), and invited competitions.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Rønnow Arkitekter is a Danish architectural consultancy delivering heritage conservation, restoration, transformation, and sustainable building services for protected and historically significant buildings. The firm serves public-sector and institutional clients via project-based architectural commissions covering surveys, master planning, design, tendering, and construction administration, with specialist capabilities in color archaeology, cultural environment mapping, and Royal Building Inspectorate services for the Danish state.

Product overview

Rønnow Arkitekter is an architectural firm offering a comprehensive suite of services centered on architecture, restoration, transformation, and conservation of historic and protected buildings. Their core offerings include architectural advisory services, restoration and transformation work on heritage buildings, and specialized services as Royal Building Inspector for the Danish state. The firm has developed a signature approach called 'Bæredygtig Byggeskik' (Sustainable Building Practice) that combines sustainability principles with knowledge of the historical building stock. The company operates through both independent operations and a strategic partnership with LETH & GORI under the name RØNNOW LETH & GORI. Their notable projects span museums (Holmegaard Værk), courthouses (Retten i Aarhus), observatories (Brorfelde), religious buildings (Christians Kirke), royal properties (Fredensborg Slot), and educational institutions (University College Sjælland, Professionshøjskolen Absalon campuses).

Differentiator

Problem solved

Functional benefit

Brands

• RØNNOW LETH & GORI: A joint studio partnership established in 2021 between Rønnow Arkitekter and LETH & GORI, creating a workshop and exhibition space for long-term sustainable architecture.

Products and services

• Arkitektrådgivning (Architecture Advisory Services)
• Restaurering og Transformation (Restoration and Transformation)
• Bæredygtig Byggeskik (Sustainable Building Practice)
• Kongelig Bygningsinspektør (Royal Building Inspector Services)
• Kulturarv Registrering (Cultural Heritage Registration)

Quantifiable outcome

• Royal Building Inspectorate frameworks covering ~33 years across multiple contract periods, handling properties including Amalienborg, Fredensborg Slot, Det Kongelige Teater, and churches across multiple Danish dioceses.
• +2 more outcomes

Named customers12 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

23 partnerships are on record, tiered core, major and minor.

• LETH & GORIcoreStrategic or Co-development Partner · 1 July 2021Rønnow Arkitekter and LETH & GORI established a joint studio under the name RØNNOW LETH & GORI in July 2021. The partnership also establishes a workshop and exhibition space for long-term sustainable architecture (værksted for langtidsholdbar arkitektur) grounded in both firms' expertise in historical building stock and cultural heritage. Both firms continue as independent companies within the jointly owned studio. The leadership consists of Rønnow's three partners (Camilla Løntoft Nybye, Mette Prip Bonné, Inge-Lise Kragh), LETH & GORI's two partners (Uffe Leth, Karsten Gori), and Martin Bloch as CEO, with Lisbeth Knudsen as chairman.
• MOE (M.O.E. A/S)majorImplementation/ SI/ Consulting PartnerRønnow Arkitekter partners with MOE as engineering sub-consultant on major Royal Building Inspectorate projects, including winning the Kongelige Bygningsinspektør contract for Inspektorat 3 (covering Amalienborg, Fredensborg Slot, Det Kongelige Teater, Statens Museum for Kunst, Den Hirschsprungske Samling, and churches in Ribe and Haderslev Stift).
• Eduard Troelsgård Rådgivende IngeniørermajorImplementation/ SI/ Consulting PartnerLongstanding engineering partner of Rønnow Arkitekter on Royal Building Inspectorate contracts and heritage projects including the Kongelige Bygningsinspektør framework, the Faklen formidlingsbygning at Mindelunden, and the Frederiks Bastion escape staircase on Holmen.
• Professionshøjskolen AbsalonmajorOthersRønnow Arkitekter serves as architectural advisor on multiple campus development projects for Professionshøjskolen Absalon, including the Biotek Campus in Kalundborg (with Rambøll), Campus Slagelse (with CC Contractor, Cubo Arkitekter, Marianne Levinsen Landskab, ÅF), and campus developments in Roskilde. The firm manages the ~13,000 m² interior design project for Campus Slagelse.
• VandkunstenmajorStrategic or Co-development PartnerRønnow Arkitekter and Vandkunsten (with Henry Jensen) were pre-qualified together for the conversion of Psykiatrisk Hospital (Bindesbøll-byen) in Risskov, Aarhus into ~18,000 m² of social housing for AAB. Also pre-qualified together for renovation and conversion of the listed Christiansfeld gl. Skole.
• BasconmajorImplementation/ SI/ Consulting PartnerRønnow Arkitekter partnered with Bascon and C.F. Møllers Landskabsarkitekter as part of the team pre-qualified for the holistic renovation of the listed Skolen ved Sundet and construction of a new after-school facility.
• C.F. Møllers LandskabsarkitektermajorImplementation/ SI/ Consulting PartnerPartnered with Rønnow Arkitekter and Bascon in the pre-qualification team for Skolen ved Sundet renovation project.
• G2RmajorStrategic or Co-development PartnerRønnow Arkitekter and G2R were pre-qualified together for the restoration and conversion of former school buildings in Flensborg (Duburger Straße) as part of the 'Skolehaven' project, involving transformation and modernization of listed buildings for housing.
• Rambøll Danmark A/SmajorImplementation/ SI/ Consulting PartnerRambøll serves as sub-consultant alongside MOE on Royal Building Inspectorate contracts. Also partnered with Rønnow as engineering consultant on the Biotek Campus Kalundborg project for Professionshøjskolen Absalon. On the Hofteatret project, Rambøll is the lead consultant (totalrådgiver) with Rønnow as building inspection authority.
• BygningsstyrelsencoreOthersBygningsstyrelsen is the primary government client commissioning Rønnow's Royal Building Inspectorate services. The framework agreements cover state-owned heritage properties and involve procurement of architectural services over multi-year contract periods.
• H+ ArkitektermajorImplementation/ SI/ Consulting PartnerRønnow Arkitekter partnered with H+ Arkitekter and Tækker Rådgivende Ingeniører on the renovation and conversion of Retten i Aarhus (Smykkeskrinet). Also partnered with H+ Arkitekter on the Skolen ved Sundet project and on the By & Havn framework agreement.
• Cubo ArkitektermajorImplementation/ SI/ Consulting PartnerPartnered with Rønnow Arkitekter and CC Contractor on Campus Slagelse for Professionshøjskolen Absalon.
• CC ContractormajorImplementation/ SI/ Consulting PartnerCC Contractor partnered with Rønnow Arkitekter as contractor on Campus Slagelse for Professionshøjskolen Absalon.
• Marianne Levinsen LandskabminorImplementation/ SI/ Consulting PartnerLandscape architecture partner on Campus Slagelse alongside Rønnow Arkitekter, CC Contractor, and Cubo Arkitekter.
• ÅFminorImplementation/ SI/ Consulting PartnerEngineering partner on Campus Slagelse project alongside Rønnow Arkitekter, CC Contractor, and Cubo Arkitekter.
• COWImajorImplementation/ SI/ Consulting PartnerRønnow Arkitekter partnered with COWI as engineering consultants and won the total consultancy contract for restoration and renovation of the listed Nørrebro Station (designed by Knud Thangaard Seest, 1930).
• By & HavnmajorOthersRønnow Arkitekter, as sub-consultant to H+ Arkitekter, won By & Havn's framework agreement for total consultancy covering ~100 properties (~390,000 m²) including listed and heritage buildings in Copenhagen's Nordhavn area. Other partners include Oluf Jørgensen Rådgivende Ingeniører and Cubic Group.
• Oluf Jørgensen Rådgivende IngeniørerminorImplementation/ SI/ Consulting PartnerEngineering sub-consultant alongside Rønnow in the H+ Arkitekter team that won the By & Havn framework agreement.
• Cubic GroupminorImplementation/ SI/ Consulting PartnerEngineering sub-consultant alongside Rønnow in the H+ Arkitekter team that won the By & Havn framework agreement.
• Nationalmuseet (National Museum of Denmark)minorImplementation/ SI/ Consulting PartnerCollaborated with Nationalmuseet on color archaeological research for the Brede Hovedbygning restoration and on a poster about restoration work at Det Kongelige Teater's Gamle Scene, presented at the APR conference in New York.
• ICOMOS DanmarkcoreOthersRønnow Arkitekter partner Camilla Løntoft Nybye has served as Chair of ICOMOS Danmark since March 2015. ICOMOS (International Council on Monuments and Sites) is UNESCO's expert body on cultural heritage conservation. This represents Rønnow's deep embedding in the international heritage preservation community.
• RealdaniaminorOthersRealdania supported the launch of ICOMOS Danmark's new website and is a key funding partner for Holmegaard Værk transformation. Rønnow has received support from Realdania for cultural heritage projects and publications.
• Tækker Rådgivende IngeniørermajorImplementation/ SI/ Consulting PartnerEngineering partner on the Retten i Aarhus (Smykkeskrinet) project alongside Rønnow Arkitekter and H+ Arkitekter.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• COWI: Major Danish engineering and architecture consultancy. Serves as sub-consultant to Rønnow on Royal Building Inspectorate contracts and competes for public-sector tenders at much larger scale, representing a broader incumbent in the heritage space.
• Vilhelm Lauritzen Arkitekter: Danish architectural practice with heritage and cultural institution portfolio including theatres and museums. Comparable project types but operates at broader scale with wider service offering.
• KHR Arkitekter: One of Denmark's largest architectural practices with broad portfolio spanning residential, commercial, and institutional work. Overlaps with Rønnow on heritage and public-sector commissions but at materially larger scale.

Direct peers

• Cubo Arkitekter: Danish architecture firm collaborating with Rønnow on Professionshøjskolen Absalon campus projects. Comparable in size with overlapping expertise in educational and adaptive-reuse architecture.
• Vandkunsten: Danish architecture firm with deep expertise in social housing, urban planning, and adaptive reuse of heritage buildings. Has partnered with Rønnow on pre-qualifications for residential conversions of listed properties in Risskov and Christiansfeld.
• Erik Brandt Dam Arkitekter: Danish heritage architecture firm specializing in restoration, transformation, and cultural buildings. Directly comparable to Rønnow Arkitekter in size, niche focus, and client base across Danish public and institutional heritage projects.
• LETH & GORI: Copenhagen-based architectural practice and Rønnow's joint-studio partner since July 2021 under RØNNOW LETH & GORI. Operates in adjacent heritage and contemporary architecture territory and is the closest comparison for capability profile.
• H+ Arkitekter: Danish architectural practice that partners frequently with Rønnow on heritage projects including Retten i Aarhus, Skolen ved Sundet, and the By & Havn framework. Comparable in scale and Danish heritage focus.
• Gottlieb Paludan Arkitekter: Danish heritage and transformation architecture firm specializing in cultural buildings, restoration, and listed-property work. Direct peer in the Danish heritage-conservation consultancy segment.

Emerging players

• Dorte Mandrup Arkitekter: Copenhagen-based architectural firm recognized for cultural and heritage-sensitive projects. Comparable on project typology (museums, cultural buildings) though with a more contemporary design profile than Rønnow's restoration specialization.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/ronnowarkitekter
• LinkedInlinkedin.com/company/r-nnow-arkitekter-a-s
• Instagraminstagram.com/ronnowarkitekter

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

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 Rønnow Arkitekters