{"id":62,"date":"2026-10-19T13:52:05","date_gmt":"2026-10-19T13:52:05","guid":{"rendered":"https:\/\/dvplumbingandgas.co.uk\/blogs\/?p=62"},"modified":"2026-10-19T14:17:54","modified_gmt":"2026-10-19T14:17:54","slug":"how-much-does-a-new-boiler-cost-installed-in-portsmouth","status":"publish","type":"post","link":"https:\/\/dvplumbingandgas.co.uk\/blogs\/how-much-does-a-new-boiler-cost-installed-in-portsmouth\/","title":{"rendered":"How Much Does a New Boiler Cost, Installed, in Portsmouth?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"275\" height=\"206\" src=\"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-content\/uploads\/2026\/10\/bb.avif\" alt=\"\" class=\"wp-image-82\" style=\"width:728px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A new combi boiler supplied and fitted typically costs \u00a32,500 to \u00a34,000 for a straightforward like-for-like replacement, based on current UK trade pricing. Converting from a system or conventional boiler to a combi usually pushes that to around \u00a34,000 or more, because it involves extra pipework and removing the old cylinder, not just swapping one unit for another.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That range is the honest starting point. The real number for your home depends on which boiler type you\u2019re replacing it with, whether it\u2019s staying in the same spot, and what condition your existing pipework and flue are in.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>New Boiler Cost by Type \u2014 Supplied and Fitted<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Boiler Type<\/strong><\/td><td><strong>Like-for-Like Replacement<\/strong><\/td><td><strong>Converting to This Type<\/strong><\/td><\/tr><tr><td>Combi<\/td><td>\u00a32,500\u2013\u00a34,000<\/td><td>Around \u00a34,000+<\/td><\/tr><tr><td>System<\/td><td>Around \u00a33,000<\/td><td>Varies by existing setup<\/td><\/tr><tr><td>Conventional\/Regular<\/td><td>Around \u00a33,000<\/td><td>Varies by existing setup<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These figures are drawn from current UK trade pricing guides (Checkatrade) and should be read as a planning range, not a quote \u2014 the only way to get an accurate figure is a survey of your specific property.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What Size Boiler Do You Need?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Boiler output is measured in kW, and the right size depends on your property, not a fixed number everyone should ask for. As a general guide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 bed, 1 bathroom, up to 5 radiators: 9\u201318kW<\/li>\n\n\n\n<li>2 bed, 2 bathroom, 5\u201310 radiators: 24\u201327kW<\/li>\n\n\n\n<li>3 bed, 3 bathroom, 10\u201320 radiators: 28\u201334kW<\/li>\n\n\n\n<li>4+ bed, 4+ bathroom, 20+ radiators: 35\u201343kW<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">An undersized boiler struggles to heat the property and runs inefficiently; an oversized one costs more upfront without the benefit. This is one of the reasons a proper survey matters more than a quote based on a phone description alone.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Is It Cheaper to Replace Like-for-Like?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, usually. Replacing a combi with a combi in the same location is the cheapest route because it reuses the existing gas supply, flue route, and pipework. Switching boiler type \u2014 combi to system, or system to combi \u2014 adds cost because it typically means new pipework, removing or adding a hot water cylinder, and sometimes a different flue route entirely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your current boiler type suits your home\u2019s hot water demand, like-for-like is usually the lower-cost and faster option. If it doesn\u2019t \u2014 for example, a combi struggling to supply hot water to two bathrooms at once \u2014 the extra cost of converting can be worth it long-term, but it\u2019s a different financial decision than a simple swap.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What Pushes the Cost Up?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Beyond the boiler type itself, these are the main factors that move the price above the baseline range:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Moving the boiler to a new location.<\/strong>&nbsp;This typically adds \u00a3500\u2013\u00a31,400 on top of the unit cost, according to UK trade pricing, depending on how far it\u2019s moving and how much pipework and flue rerouting is involved. A straightforward move within the same room costs less than relocating to a loft or garage.<\/li>\n\n\n\n<li><strong>A magnetic filter.<\/strong>&nbsp;Often \u00a3110\u2013\u00a3310 supplied and fitted, protecting the new boiler from debris already in your heating system.<\/li>\n\n\n\n<li><strong>A smart thermostat or upgraded controls.<\/strong>&nbsp;Around \u00a3150 for the unit, before installation.<\/li>\n\n\n\n<li><strong>A powerflush.<\/strong>&nbsp;Roughly \u00a31,000 including VAT, recommended when the existing system has a build-up of sludge that could shorten the new boiler\u2019s life.<\/li>\n\n\n\n<li><strong>Access and disposal.<\/strong>&nbsp;Difficult access to the current boiler, or removing and disposing of an old cylinder, adds labour time.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A quote that doesn\u2019t itemise these separately is harder to compare against another quote \u2014 ask whether removal of the old boiler, a magnetic filter, and any making-good work are included before accepting a price.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How Long Does Installation Take?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A like-for-like boiler replacement typically takes 4\u20136 hours, often completed in a single day. Converting from a conventional or system boiler to a combi usually takes 1.5\u20133 days, since it involves more extensive pipework changes and removing redundant tanks or cylinders. Moving a boiler to a new location adds time on top of either of these, depending on the distance and complexity involved.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Getting an Accurate Quote for Your Home<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The ranges above get you close, but the actual figure for your home depends on your current boiler type, where it sits, and what your pipework and flue look like now.<a target=\"_blank\" href=\"https:\/\/www.dvplumbingandgas.co.uk\/boilerinstallations\" rel=\"noopener\"><u>&nbsp;<\/u><\/a><a target=\"_blank\" href=\"https:\/\/www.dvplumbingandgas.co.uk\/boilerinstallations\" rel=\"noopener\"><u>DV Plumbing &amp; Gas\u2019s boiler installation service<\/u><\/a>&nbsp;covers combi, system and conventional boiler installation across Portsmouth and the surrounding area, with a property survey before any firm price is given \u2014 not a number guessed over the phone. The team, led by Gas Safe and MCS registered engineer Duncan Vella alongside Rhys Browne, also covers<a target=\"_blank\" href=\"https:\/\/www.dvplumbingandgas.co.uk\/boiler-services\" rel=\"noopener\"><u>&nbsp;<\/u><\/a><a target=\"_blank\" href=\"https:\/\/www.dvplumbingandgas.co.uk\/boiler-services\" rel=\"noopener\"><u>ongoing boiler servicing and repairs<\/u><\/a>&nbsp;once your new boiler is installed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Ready for an Accurate Price on Your New Boiler?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The ranges in this guide will get you close, but the real number depends on your current boiler, your pipework, and what\u2019s actually behind your airing cupboard \u2014 not a UK-wide average. Duncan Vella and the team at DV Plumbing &amp; Gas Services survey your property first, so the price you\u2019re quoted is the price you pay, not a starting figure that grows once work begins.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/www.dvplumbingandgas.co.uk\/contact\" rel=\"noopener\"><strong><u>Get a free boiler installation quote<\/u><\/strong><\/a>&nbsp;and we\u2019ll tell you honestly whether like-for-like replacement or a conversion is the right call for your home.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>FAQ<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Does the boiler installation price include VAT?<\/strong>&nbsp;Check this with whoever quotes you \u2014 some trade quotes are VAT-inclusive and some are not, and it isn\u2019t always stated clearly. Ask directly before comparing two quotes against each other.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is a magnetic filter included in a new boiler installation?<\/strong>&nbsp;Not always as standard. It\u2019s a relatively small additional cost (roughly \u00a3110\u2013\u00a3310 fitted) that protects the new boiler from existing system debris, so it\u2019s worth asking whether it\u2019s included or needs adding separately.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How much more does it cost to move my boiler to a new location?<\/strong>&nbsp;Typically \u00a3500\u2013\u00a31,400 on top of the unit and installation cost, depending on how far it\u2019s moving and how much new pipework and flue work is involved. A same-room move costs less than relocating to a different floor or outbuilding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can I get a fixed price without a survey?<\/strong>&nbsp;A realistic one is unlikely. Boiler cost depends on your current setup, access, and whether you\u2019re staying with the same boiler type \u2014 a firm, accurate price normally needs someone to see the property first, not just hear a description over the phone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new combi boiler supplied and fitted typically costs \u00a32,500 to \u00a34,000 for a straightforward like-for-like replacement, based on current UK trade pricing. Converting from a system or conventional boiler to a combi usually pushes that to around \u00a34,000 or more, because it involves extra pipework and removing the old cylinder, not just swapping one unit for another. That range &hellip;<\/p>\n","protected":false},"author":1,"featured_media":82,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-62","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-boiler-installation"],"_links":{"self":[{"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/comments?post=62"}],"version-history":[{"count":9,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":84,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/posts\/62\/revisions\/84"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/media\/82"}],"wp:attachment":[{"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/media?parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/categories?post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dvplumbingandgas.co.uk\/blogs\/wp-json\/wp\/v2\/tags?post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}