{"id":13990,"date":"2025-12-11T09:31:42","date_gmt":"2025-12-11T09:31:42","guid":{"rendered":"https:\/\/www.in-ex.hu\/?p=13990"},"modified":"2026-02-10T08:39:13","modified_gmt":"2026-02-10T08:39:13","slug":"what-is-the-fundamental-difference-between-additional-and-supplementary-work","status":"publish","type":"post","link":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/","title":{"rendered":"What is the fundamental difference between additional and supplementary work?"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

One of the greatest difficulties for designers during design projects is determining when requests arising from the client\u2019s expectations or designs prepared based on the contract between the parties can be considered additional or supplementary work.<\/p>\n","protected":false},"author":4,"featured_media":14031,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-13990","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nWhat is the fundamental difference between additional and supplementary work? - STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda<\/title>\n<meta name=\"description\" content=\"Distinguishing between additional and extra work in design contract performance. Difference between additional and supplementary work.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Difference between additional and supplementary work.\" \/>\n<meta property=\"og:description\" content=\"Distinguishing between additional and extra work in design contract performance. Difference between additional and supplementary work.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/\" \/>\n<meta property=\"og:site_name\" content=\"STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-11T09:31:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-10T08:39:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.in-ex.hu\/wp-content\/uploads\/2025\/11\/jogblogszurke.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"851\" \/>\n\t<meta property=\"og:image:height\" content=\"315\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"kata.moro\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"kata.moro\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/\"},\"author\":{\"name\":\"kata.moro\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/#\\\/schema\\\/person\\\/4a1e210cf21f15a2ed1304b0f5ed6688\"},\"headline\":\"What is the fundamental difference between additional and supplementary work?\",\"datePublished\":\"2025-12-11T09:31:42+00:00\",\"dateModified\":\"2026-02-10T08:39:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/\"},\"wordCount\":10,\"image\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.in-ex.hu\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/jogblogszurke.jpg\",\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/\",\"url\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/\",\"name\":\"What is the fundamental difference between additional and supplementary work? - STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.in-ex.hu\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/jogblogszurke.jpg\",\"datePublished\":\"2025-12-11T09:31:42+00:00\",\"dateModified\":\"2026-02-10T08:39:13+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/#\\\/schema\\\/person\\\/4a1e210cf21f15a2ed1304b0f5ed6688\"},\"description\":\"Distinguishing between additional and extra work in design contract performance. Difference between additional and supplementary work.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.in-ex.hu\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/jogblogszurke.jpg\",\"contentUrl\":\"https:\\\/\\\/www.in-ex.hu\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/jogblogszurke.jpg\",\"width\":851,\"height\":315},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/home\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What is the fundamental difference between additional and supplementary work?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/\",\"name\":\"STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda\",\"description\":\"\u00c9p\u00edt\u00e9szet \u00e9s m\u00e9rn\u00f6ks\u00e9g piacvezet\u0151 BIM szaktud\u00e1ssal\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/#\\\/schema\\\/person\\\/4a1e210cf21f15a2ed1304b0f5ed6688\",\"name\":\"kata.moro\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6c5a726c7538b28cac7a667c698617fb77fecb4f1843be3cd8af4e8b78531a6e?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6c5a726c7538b28cac7a667c698617fb77fecb4f1843be3cd8af4e8b78531a6e?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6c5a726c7538b28cac7a667c698617fb77fecb4f1843be3cd8af4e8b78531a6e?s=96&d=mm&r=g\",\"caption\":\"kata.moro\"},\"url\":\"https:\\\/\\\/www.in-ex.hu\\\/en\\\/author\\\/kata-moro\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is the fundamental difference between additional and supplementary work? - STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda","description":"Distinguishing between additional and extra work in design contract performance. Difference between additional and supplementary work.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/","og_locale":"en_US","og_type":"article","og_title":"Difference between additional and supplementary work.","og_description":"Distinguishing between additional and extra work in design contract performance. Difference between additional and supplementary work.","og_url":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/","og_site_name":"STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda","article_published_time":"2025-12-11T09:31:42+00:00","article_modified_time":"2026-02-10T08:39:13+00:00","og_image":[{"width":851,"height":315,"url":"https:\/\/www.in-ex.hu\/wp-content\/uploads\/2025\/11\/jogblogszurke.jpg","type":"image\/jpeg"}],"author":"kata.moro","twitter_card":"summary_large_image","twitter_misc":{"Written by":"kata.moro","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#article","isPartOf":{"@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/"},"author":{"name":"kata.moro","@id":"https:\/\/www.in-ex.hu\/en\/#\/schema\/person\/4a1e210cf21f15a2ed1304b0f5ed6688"},"headline":"What is the fundamental difference between additional and supplementary work?","datePublished":"2025-12-11T09:31:42+00:00","dateModified":"2026-02-10T08:39:13+00:00","mainEntityOfPage":{"@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/"},"wordCount":10,"image":{"@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#primaryimage"},"thumbnailUrl":"https:\/\/www.in-ex.hu\/wp-content\/uploads\/2025\/11\/jogblogszurke.jpg","inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/","url":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/","name":"What is the fundamental difference between additional and supplementary work? - STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda","isPartOf":{"@id":"https:\/\/www.in-ex.hu\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#primaryimage"},"image":{"@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#primaryimage"},"thumbnailUrl":"https:\/\/www.in-ex.hu\/wp-content\/uploads\/2025\/11\/jogblogszurke.jpg","datePublished":"2025-12-11T09:31:42+00:00","dateModified":"2026-02-10T08:39:13+00:00","author":{"@id":"https:\/\/www.in-ex.hu\/en\/#\/schema\/person\/4a1e210cf21f15a2ed1304b0f5ed6688"},"description":"Distinguishing between additional and extra work in design contract performance. Difference between additional and supplementary work.","breadcrumb":{"@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#primaryimage","url":"https:\/\/www.in-ex.hu\/wp-content\/uploads\/2025\/11\/jogblogszurke.jpg","contentUrl":"https:\/\/www.in-ex.hu\/wp-content\/uploads\/2025\/11\/jogblogszurke.jpg","width":851,"height":315},{"@type":"BreadcrumbList","@id":"https:\/\/www.in-ex.hu\/en\/what-is-the-fundamental-difference-between-additional-and-supplementary-work\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.in-ex.hu\/en\/home\/"},{"@type":"ListItem","position":2,"name":"What is the fundamental difference between additional and supplementary work?"}]},{"@type":"WebSite","@id":"https:\/\/www.in-ex.hu\/en\/#website","url":"https:\/\/www.in-ex.hu\/en\/","name":"STUDIO IN-EX - \u00c9p\u00edt\u00e9szeti \u00e9s m\u00e9rn\u00f6ki iroda","description":"\u00c9p\u00edt\u00e9szet \u00e9s m\u00e9rn\u00f6ks\u00e9g piacvezet\u0151 BIM szaktud\u00e1ssal","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.in-ex.hu\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.in-ex.hu\/en\/#\/schema\/person\/4a1e210cf21f15a2ed1304b0f5ed6688","name":"kata.moro","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/6c5a726c7538b28cac7a667c698617fb77fecb4f1843be3cd8af4e8b78531a6e?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/6c5a726c7538b28cac7a667c698617fb77fecb4f1843be3cd8af4e8b78531a6e?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6c5a726c7538b28cac7a667c698617fb77fecb4f1843be3cd8af4e8b78531a6e?s=96&d=mm&r=g","caption":"kata.moro"},"url":"https:\/\/www.in-ex.hu\/en\/author\/kata-moro\/"}]}},"_links":{"self":[{"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/posts\/13990","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/comments?post=13990"}],"version-history":[{"count":9,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/posts\/13990\/revisions"}],"predecessor-version":[{"id":14543,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/posts\/13990\/revisions\/14543"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/media\/14031"}],"wp:attachment":[{"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/media?parent=13990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/categories?post=13990"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.in-ex.hu\/en\/wp-json\/wp\/v2\/tags?post=13990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}