Chamber music without piano
Violin solo
| 1921 | Phantasie |
| 1922 | Three Suites op. 68a |
| Three Sonatas op. 68b |
Cello solo
| 1927 | Zwei Rhapsodien über amerikanische Negro Songs |
| 1928 | Drei Sonaten für eine Bass-stimme (Violoncell ad lib.) |
| 1930 | Sonate |
| Suite I | |
| Suite II Schwedische Volksweise |
Two string instruments
| 1864 | 4 Kleine Stücke für 2 Violinen |
| 1869 | Duett für Violine und Viola |
| 1925 | Sonate B minor für Violine und Violoncell |
| Variationen und Finale über ein Thema von Karl Michael Bellmann (1740-1795), für Violine und Violoncell |
Trios for violin, viola and cello
| 1915 | String trio D major op. 76 |
| 1918 | Trio A minor |
| 1919 | Trio E minor |
| Walzer Suite D major | |
| 1920 | Trio B minor |
| Trio F-sharp minor | |
| Trio G major | |
| 1923 | Trio A major |
| Trio A-flat major | |
| Trio F minor | |
| 1925 | Trio G minor |
| Trio A major | |
| Trio A major | |
| 1928 | Trio C minor |
| 1929 | Trio C minor (Auto Trio) |
| 1930 | Trio C-sharp minor |
Various trios
| 1917 | Trio for flute, oboe en bassoon op. 86 |
| 1923 | Terzet for flute, violin and viola |
| 1927 | Ariel-trio por flûte, cor et harpe |
String quartets
| 1867 | Quartet G major |
| 1874 | Quartet A major |
| 1877 | Quartet C minor Quartet F-sharp minor |
| 1880 | Quartet A minor (3rd part is identical to the quartet from 1874) |
| 1908 | Adagio [3rd part] und Allegro giocoso [4th part] zum unvollendeten Streichquartett F major (1891) von Edvard Grieg nach Skizzen ausgearbeitet von Julius Röntgen |
| 1916-1917 | 6 Quartettinos (E-flat major, E minor, F major, F minor, A major, E-major; no. 2, 3 and 5 revised 1931) |
| 1917 | 3 Quartets: A major (also for piano four hands, 1917), G minor 1st version, C major |
| Quartet G minor 2nd version (Fancy) | |
| 1922 | Quartet C-sharp minor (Halewijn) |
| Quartet E minor | |
| Quartet E-flat minor | |
| Quartet E-flat major | |
| Bauener Quartettino, A minor | |
| 1924 | Quartet F minor (also for piano four hands, 1925) |
| 1925 | Quartett C major |
| 1927 | Quartet F-sharp minor Quartet G-sharp minor |
| 1928 | Quartet E-flat minor |
| 1929 | Quartet F-sharp minor (also for piano four hands, 1929) Quartet B minor (also for piano four hands, 1929) |
| 1931 | Quartet C minor |
| 1932 | Quartett nach Beethovens Sonate op. 101 |
String quintets
| 1877 | Nur ein alla dutta Sätzchen für die Feiertage, Adagio A-flat major (motto: 'Wenig mit Liebe') |
| Quintet C major | |
| Quintet C minor (in one part) |
Various quintets
| 1917 | Hirtenlied for oboe and string quartet |
| 1928 | Serenade for flute, oboe, clarinet, French horn and bassoon |
| Scherzo for flute, oboe, clarinet, French horn and bassoon |
Larger chamber music ensembles
| 1877 | Serenade for wind instruments in A major op. 14, for flute, oboe, clarinet, two French horns and two bassoons |
| 1931 | Sextett G major für zwei Violinen, zwei Bratschen und zwei Violoncellos |