[{"data":1,"prerenderedAt":685},["ShallowReactive",2],{"sanity-1MfbnHAseR":3,"sanity-swdrfLWKzJ":30,"sanity-rL6AzE7Ccq":583,"sanity-i8JUreSf1a":607,"sanity-26lUdxxEPw":675,"sanity-oxZyK26MyS":683},[4],{"_createdAt":5,"_id":6,"_rev":7,"_system":8,"_type":6,"_updatedAt":11,"office_address":12,"office_contact":19,"office_hours":24},"2024-10-21T15:31:56Z","options","o0Z5oBPzurFYWa77gcSjxF",{"base":9},{"id":6,"rev":10},"LKL3bigAMfl2dNRmYc1OCn","2026-04-10T20:49:49Z",{"_type":13,"city":14,"country":15,"name_number":16,"postcode":17,"street":18},"address","Scorrier, Redruth","United Kingdom","Warvena Construction","TR16 5FG","Unit 2, Cornwall Business Park West, Space to Work",{"_type":20,"email":21,"instagram":22,"phone":23},"contact","info@warvenaconstruction.co.uk","https://www.instagram.com/warvena_construction/","01872 300856",[25],{"_key":26,"_type":27,"day":28,"times":29},"cdf4a287633d","office_hours_item","Monday to Friday","9am to 5pm",[31],{"_createdAt":32,"_id":33,"_rev":34,"_system":35,"_type":38,"_updatedAt":39,"components":40,"excerpt":575,"seo":576,"slug":579,"title":582},"2026-06-05T20:09:47Z","9e412b1c-8363-4b8f-b893-f903ff92245d","g0TwJNxt7ZcHN9os7dDHG5",{"base":36},{"id":33,"rev":37},"g0TwJNxt7ZcHN9os7dCcKD","blog","2026-06-05T20:26:09Z",[41,53,102,153,201,249,289,321,361,368,450],{"_key":42,"_type":43,"content":44,"media":49,"size":51,"type":52},"bc2d8eb4cfac","hero",{"text":45,"text_align":46,"title":47,"title_size":48},"The weeks before the first machine arrives on site are the quietest of any build — and the most decisive. This is what actually happens between signing the contract and breaking ground, and why getting it right protects everything that follows.","left","What Happens Before Construction Starts? A Cornwall Builder's Guide","small",{"media_type":50},"image","large","default",{"_key":54,"_type":55,"content":56,"layout":94},"f13325fcf4cd","content_area",{"animate_title":57,"text":58,"title_size":48},false,[59,70,78,86],{"_key":60,"_type":61,"children":62,"markDefs":68,"style":69},"67c1cc22a46d","block",[63],{"_key":64,"_type":65,"marks":66,"text":67},"b8aa0e4c7b62","span",[],"There's a moment in every build that nobody photographs. The contract is signed, the excitement is real, and the client expects to see diggers within days. Instead, for several weeks, almost nothing visible happens.",[],"normal",{"_key":71,"_type":61,"children":72,"markDefs":77,"style":69},"478871a3e611",[73],{"_key":74,"_type":65,"marks":75,"text":76},"cf360579cd08",[],"This is the pre-construction phase — and it is the most misunderstood part of building a home. To a client watching from the outside, it can feel like delay. To an experienced builder, it's the most important work of the entire project. Everything that goes well on site was set up here. And almost everything that goes wrong on site can be traced back to something that was rushed, skipped, or assumed during these weeks.",[],{"_key":79,"_type":61,"children":80,"markDefs":85,"style":69},"523700ceb1f4",[81],{"_key":82,"_type":65,"marks":83,"text":84},"85f4372f4539",[],"Here's what actually happens before construction starts on a Cornish build — and why this quiet phase is the one that protects your budget, your programme, and your sanity.",[],{"_key":87,"_type":61,"children":88,"markDefs":93,"style":69},"61b8a2ba816a",[89],{"_key":90,"_type":65,"marks":91,"text":92},"5c8f624d99ae",[],"→ How long does a bespoke build take in Cornwall? → /blog/how-long-to-build-a-house-cornwall",[],{"spacing":95,"theme":99},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":57,"section_padding_bottom":97,"section_padding_top":98},"spacing","section-padding-bottom","section-padding-top",{"_type":100,"theme":101},"theme","theme-light bg-white",{"_key":103,"_type":55,"content":104,"layout":147},"10b1df739dcf",{"animate_title":57,"text":105,"title":146,"title_size":48},[106,114,122,130,138],{"_key":107,"_type":61,"children":108,"markDefs":113,"style":69},"bd0721e54ee7",[109],{"_key":110,"_type":65,"marks":111,"text":112},"3bf0ab4525b3",[],"Before anyone designs a foundation or prices groundworks, you need to know what's actually under and around the site. On a Cornish plot, this matters more than almost anywhere in the UK.",[],{"_key":115,"_type":61,"children":116,"markDefs":121,"style":69},"0a06f73c3761",[117],{"_key":118,"_type":65,"marks":119,"text":120},"ab805d19c353",[],"A topographic survey maps the exact levels, boundaries and features of the site. A ground investigation — trial pits or boreholes — reveals what's beneath the surface. And in Cornwall, what's beneath the surface is rarely predictable. Granite bedrock can sit at 300mm in the west of the county, demanding rock-breaking equipment and reshaping the entire foundation strategy. River valley sites can hide made ground, soft clay, or a high water table. Old mining areas carry their own complications entirely.",[],{"_key":123,"_type":61,"children":124,"markDefs":129,"style":69},"fd04f505d5c5",[125],{"_key":126,"_type":65,"marks":127,"text":128},"9869a8adcb8e",[],"The cost of a ground investigation is small. The cost of discovering difficult ground after you've priced and started groundworks is not. This survey is the single most valuable piece of information in the whole pre-construction phase — it's what turns a guessed foundation cost into a real one.",[],{"_key":131,"_type":61,"children":132,"markDefs":137,"style":69},"b5de174b3ad0",[133],{"_key":134,"_type":65,"marks":135,"text":136},"9e4282444a4c",[],"Ecology surveys also happen here. Cornwall's protected species — bats, dormice, nesting birds — have survey windows that only open at certain times of year. Miss the window and you can lose months waiting for the next one.",[],{"_key":139,"_type":61,"children":140,"markDefs":145,"style":69},"cf33ff00deb6",[141],{"_key":142,"_type":65,"marks":143,"text":144},"a78c7e49bf01",[],"→ How much does it cost to build a house in Cornwall? → /blog/cost-to-build-a-house-cornwall",[],"1. Surveys and site investigations — knowing what you're building on",{"spacing":148,"theme":152},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":149,"section_padding_bottom":150,"section_padding_top":151},true,"section-padding-bottom-xs","section-padding-top-xs",{"_type":100,"theme":101},{"_key":154,"_type":55,"content":155,"layout":198},"9d5905e24aa24e50027fa1d5913f7fb4",{"animate_title":57,"text":156,"title":197,"title_size":48},[157,165,173,181,189],{"_key":158,"_type":61,"children":159,"markDefs":164,"style":69},"55992b1f1ccd",[160],{"_key":161,"_type":65,"marks":162,"text":163},"d8c2e4f27cae",[],"Here's something most first-time builders don't realise: getting planning permission does not mean you're allowed to start building.",[],{"_key":166,"_type":61,"children":167,"markDefs":172,"style":69},"a0f0eb7cc62b",[168],{"_key":169,"_type":65,"marks":170,"text":171},"96d39fedbfed",[],"Almost every planning consent in Cornwall comes with conditions attached — and many of them are pre-commencement conditions, meaning they must be formally discharged by Cornwall Council before a single spade goes in the ground. These cover things like drainage strategy, materials approval, archaeological investigation, ecological mitigation, and construction management plans.",[],{"_key":174,"_type":61,"children":175,"markDefs":180,"style":69},"96f1f943663a",[176],{"_key":177,"_type":65,"marks":178,"text":179},"4f2dbb699a6a",[],"Each condition has to be satisfied, submitted, and signed off. That process takes time — often six to eight weeks, sometimes longer if the council requests further information. Builders who treat this as an afterthought get caught out. Builders who plan for it map every condition the moment consent is granted and work through them in parallel, so the discharge is complete by the time the site is ready.",[],{"_key":182,"_type":61,"children":183,"markDefs":188,"style":69},"e62b4b9737df",[184],{"_key":185,"_type":65,"marks":186,"text":187},"5b4fc028743f",[],"This is exactly the kind of thing that's handled during a well-run pre-construction phase — and it's why early contractor involvement saves so much time later.",[],{"_key":190,"_type":61,"children":191,"markDefs":196,"style":69},"9d02ee891883",[192],{"_key":193,"_type":65,"marks":194,"text":195},"4cb1ad926309",[],"→ Pre-Construction & Early Contractor Involvement → /blog/pre-construction-cornwall",[],"2. Discharging planning conditions — permission isn't the finish line",{"spacing":199,"theme":200},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":149,"section_padding_bottom":150,"section_padding_top":151},{"_type":100,"theme":101},{"_key":202,"_type":55,"content":203,"layout":246},"29419b386850ede1a4ca96a5595796fa",{"animate_title":57,"text":204,"title":245,"title_size":48},[205,213,221,229,237],{"_key":206,"_type":61,"children":207,"markDefs":212,"style":69},"396496b6a06b",[208],{"_key":209,"_type":65,"marks":210,"text":211},"41c08fb17a47",[],"This is where experience genuinely separates a smooth build from a stalled one.",[],{"_key":214,"_type":61,"children":215,"markDefs":220,"style":69},"b07af92e8388",[216],{"_key":217,"_type":65,"marks":218,"text":219},"9f7707c2eb75",[],"Some materials sit on a shelf and arrive in days. Others are made to order and take months. On a bespoke Cornish home, the long-lead items are often the ones the whole programme depends on. Bespoke triple-glazed, coastal-rated windows commonly take 20 to 24 weeks from order to delivery. Certified Passive House MVHR units, engineered timber frames, and specialist structural steel carry similar lead times.",[],{"_key":222,"_type":61,"children":223,"markDefs":228,"style":69},"8264116198ef",[224],{"_key":225,"_type":65,"marks":226,"text":227},"c7af9d208255",[],"The logic is simple but easy to get wrong: these items must be identified and ordered early — ideally the moment planning consent is confirmed — so they arrive exactly when the build needs them. Order them late and they don't just delay themselves; they stall the weather-tight milestone that the entire interior programme depends on.",[],{"_key":230,"_type":61,"children":231,"markDefs":236,"style":69},"535b00911020",[232],{"_key":233,"_type":65,"marks":234,"text":235},"a8dd088e87db",[],"Good pre-construction procurement is essentially a race against the calendar, run quietly in the background while the rest of the setup happens.",[],{"_key":238,"_type":61,"children":239,"markDefs":244,"style":69},"0cfe1e92e79d",[240],{"_key":241,"_type":65,"marks":242,"text":243},"23e86bfa5a4a",[],"→ Timber Frame & Modern Construction Methods Cornwall → /blog/timber-frame-cornwall",[],"3. Procurement — ordering the things that take longest first",{"spacing":247,"theme":248},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":149,"section_padding_bottom":150,"section_padding_top":151},{"_type":100,"theme":101},{"_key":250,"_type":55,"content":251,"layout":286},"0b4db079d4dd57946ac5a68a1771d975",{"animate_title":57,"text":252,"title":285,"title_size":48},[253,261,269,277],{"_key":254,"_type":61,"children":255,"markDefs":260,"style":69},"6b8ef1772a96",[256],{"_key":257,"_type":65,"marks":258,"text":259},"0d535c7cd007",[],"Temporary works are everything built to enable the permanent build — structures that exist only for the duration of construction and are then removed. They're invisible in the finished home, but without them, nothing safe or efficient happens on site.",[],{"_key":262,"_type":61,"children":263,"markDefs":268,"style":69},"e7df308e2160",[264],{"_key":265,"_type":65,"marks":266,"text":267},"537becc25ce4",[],"On a Cornish site this can include site access roads capable of carrying heavy plant onto an awkward or sloping plot, scaffolding designed for an exposed coastal elevation, temporary propping and shoring for excavations, ground stabilisation, and welfare facilities for the team. On steep or coastal sites — which describes a great many of Cornwall's most desirable plots — temporary works planning is a significant undertaking in its own right.",[],{"_key":270,"_type":61,"children":271,"markDefs":276,"style":69},"8cf316dba9c2",[272],{"_key":273,"_type":65,"marks":274,"text":275},"383751be43c0",[],"It's planned before construction because getting it wrong is both dangerous and expensive. A site that can't safely receive a concrete lorry or a crane on the day it's needed costs time and money the moment that becomes apparent.",[],{"_key":278,"_type":61,"children":279,"markDefs":284,"style":69},"e5f4aee42132",[280],{"_key":281,"_type":65,"marks":282,"text":283},"e0b4398ca845",[],"→ Coastal construction in Cornwall → /services#coastal-construction",[]," 4. Temporary works — the things that make the real work possible",{"spacing":287,"theme":288},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":149,"section_padding_bottom":150,"section_padding_top":151},{"_type":100,"theme":101},{"_key":290,"_type":55,"content":291,"layout":318},"d14b2e0b3573af4767f2f32c3049e9ef",{"animate_title":57,"text":292,"title":317,"title_size":48},[293,301,309],{"_key":294,"_type":61,"children":295,"markDefs":300,"style":69},"b31d3db041c6",[296],{"_key":297,"_type":65,"marks":298,"text":299},"74e324ecfc3a",[],"Sequencing is the master plan: the precise order in which every trade, delivery and inspection happens, mapped against the calendar. It's the difference between a site where work flows and one where trades arrive to find they can't start because the previous task isn't finished.",[],{"_key":302,"_type":61,"children":303,"markDefs":308,"style":69},"38d967ba7bde",[304],{"_key":305,"_type":65,"marks":306,"text":307},"9256e801696a",[],"A good sequence accounts for the things unique to Cornwall. It schedules heavy groundworks and roofing away from the worst of the Atlantic storm season, because a substructure programme that should take six weeks can drift to ten if it lands in saturated winter ground. It builds in the lead times of the long-lead items. It coordinates the inspections that have to happen before work is concealed. And it maps the critical path — the chain of tasks that directly determines your completion date — so everyone knows which delays matter and which don't.",[],{"_key":310,"_type":61,"children":311,"markDefs":316,"style":69},"fad4f2544c28",[312],{"_key":313,"_type":65,"marks":314,"text":315},"d3ab14157122",[],"This is the quiet intellectual work of building. It doesn't look like much on paper, but a well-sequenced project feels effortless on site, and a badly sequenced one feels like a series of small emergencies.",[]," 5. Sequencing — the order everything happens in",{"spacing":319,"theme":320},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":149,"section_padding_bottom":150,"section_padding_top":151},{"_type":100,"theme":101},{"_key":322,"_type":55,"content":323,"layout":358},"4b1b3bd19a40336d89602d9fa8048b2a",{"animate_title":57,"text":324,"title":357,"title_size":48},[325,333,341,349],{"_key":326,"_type":61,"children":327,"markDefs":332,"style":69},"54017de55014",[328],{"_key":329,"_type":65,"marks":330,"text":331},"7087b92c946a",[],"Here's the honest truth that good builders want clients to understand: the pre-construction phase is where your money is best spent and your risk is best managed.",[],{"_key":334,"_type":61,"children":335,"markDefs":340,"style":69},"05352c108089",[336],{"_key":337,"_type":65,"marks":338,"text":339},"75a3e87a30d4",[],"Every problem caught here is caught on paper, where it's cheap to fix. Every problem missed here is discovered on site, where it's expensive, disruptive, and stressful to resolve. A client who understands this stops seeing the quiet weeks before groundwork as delay, and starts seeing them for what they are — the foundation of a build that runs the way it should.",[],{"_key":342,"_type":61,"children":343,"markDefs":348,"style":69},"87a44aeea51f",[344],{"_key":345,"_type":65,"marks":346,"text":347},"9966ccad1947",[],"This is exactly how Warvena work. As TrustMark registered, Passivhaus-listed builders based in Redruth, we treat pre-construction as the most important phase of any project — because in our experience, it's the phase that determines whether everything that follows goes to plan. If you're planning a build in Cornwall and want it to start on solid ground, we'd be glad to talk.",[],{"_key":350,"_type":61,"children":351,"markDefs":356,"style":69},"661e470aaa3d",[352],{"_key":353,"_type":65,"marks":354,"text":355},"8b1362ea7ab1",[],"→ PCSA agreements explained → /blog/pcsa-agreement-cornwall",[]," Why this phase builds trust — and protects you",{"spacing":359,"theme":360},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":149,"section_padding_bottom":97,"section_padding_top":151},{"_type":100,"theme":101},{"_key":362,"_type":55,"content":363,"layout":365},"6ca2963a0ac7",{"animate_title":57,"title":364,"title_size":48}," Frequently asked questions",{"spacing":366,"theme":367},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":57,"section_padding_bottom":97,"section_padding_top":98},{"_type":100,"theme":101},{"_key":369,"_type":370,"accordion":371,"content":445,"layout":447},"0ee2772349c6","accordion",[372,385,397,409,421,433],{"_key":373,"_type":374,"text":375,"title":384},"8c5b78468e25","accordion_item",[376],{"_key":377,"_type":61,"children":378,"markDefs":383,"style":69},"1a9a43b70fb3",[379],{"_key":380,"_type":65,"marks":381,"text":382},"166ffa0aab9c",[],"Before construction starts, a series of essential tasks take place: site surveys and ground investigations, discharge of pre-commencement planning conditions, procurement of long-lead materials, planning of temporary works, and detailed sequencing of the build programme. On a Cornish build, this phase typically takes several weeks to a few months and is the most important period for protecting the budget and programme. Almost everything that goes well on site is set up during this phase.",[],"What happens before construction starts on a new build?",{"_key":386,"_type":374,"text":387,"title":396},"9875b886d5da",[388],{"_key":389,"_type":61,"children":390,"markDefs":395,"style":69},"29cc74cef1c6",[391],{"_key":392,"_type":65,"marks":393,"text":394},"cac0754d8d56",[],"The pre-construction phase typically takes several weeks to a few months, depending on the complexity of the site and the planning conditions attached to consent. Discharging pre-commencement conditions with Cornwall Council often takes six to eight weeks alone. Ground investigations, ecology surveys, and the ordering of long-lead materials all happen during this period. Rushing it almost always costs more time later than it saves.",[],"How long does the pre-construction phase take in Cornwall?",{"_key":398,"_type":374,"text":399,"title":408},"b41c2caf6fc5",[400],{"_key":401,"_type":61,"children":402,"markDefs":407,"style":69},"8ac55b038f0b",[403],{"_key":404,"_type":65,"marks":405,"text":406},"ffbcd0dfe057",[],"Surveys reveal what you're actually building on. A topographic survey maps the site's levels and boundaries; a ground investigation reveals what's beneath the surface. In Cornwall, ground conditions vary enormously — granite bedrock, made ground, high water tables and old mining areas all affect foundation cost and strategy. A ground investigation turns a guessed foundation cost into a real one, and is the single most valuable piece of information in the whole pre-construction phase.",[],"Why does my builder need surveys before starting?",{"_key":410,"_type":374,"text":411,"title":420},"b209874f637d",[412],{"_key":413,"_type":61,"children":414,"markDefs":419,"style":69},"1092cbb46db3",[415],{"_key":416,"_type":65,"marks":417,"text":418},"ce3a394e2c37",[],"Most planning consents come with conditions attached. Pre-commencement conditions must be formally satisfied and signed off by the local authority before construction can legally begin. These cover things like drainage, materials, archaeology and ecology. Discharging them takes time — often six to eight weeks — and is a common cause of delay when builders treat it as an afterthought rather than mapping it from the moment consent is granted.",[],"What does discharging planning conditions mean?",{"_key":422,"_type":374,"text":423,"title":432},"c7c785ea0175",[424],{"_key":425,"_type":61,"children":426,"markDefs":431,"style":69},"815835d31bef",[427],{"_key":428,"_type":65,"marks":429,"text":430},"f5007122f017",[],"Temporary works are structures built to enable construction that are removed once the permanent build is complete — things like site access roads, scaffolding, excavation propping, ground stabilisation and welfare facilities. They're invisible in the finished home but essential to building it safely and efficiently. On steep or coastal Cornish sites, temporary works planning can be a significant undertaking in its own right.",[],"What are temporary works in construction?",{"_key":434,"_type":374,"text":435,"title":444},"a80e3ae9863d",[436],{"_key":437,"_type":61,"children":438,"markDefs":443,"style":69},"0aafb0675308",[439],{"_key":440,"_type":65,"marks":441,"text":442},"3f67821d5b5d",[],"Because every problem caught before construction is caught on paper, where it's cheap and easy to fix. Every problem missed is discovered on site, where it's expensive, disruptive and stressful. Surveys, planning discharge, procurement and sequencing all happen in this phase, and getting them right protects the budget, the programme and the quality of the finished home. It's the phase that determines whether everything that follows goes to plan.",[],"Why is the pre-construction phase so important?",{"title":446},"        ",{"spacing":448,"theme":449},{"_type":96,"include_section_padding_bottom":57,"include_section_padding_top":57,"section_padding_bottom":97,"section_padding_top":98},{"_type":100,"theme":101},{"_key":451,"_type":55,"content":452,"layout":572},"af9f1e17fcd2",{"animate_title":57,"text":453,"title":571,"title_size":48},[454,507,515,523,535,542,553,560],{"_key":455,"_type":61,"children":456,"markDefs":497,"style":69},"b97cf6972ee4",[457,461,466,470,475,479,484,488,493],{"_key":458,"_type":65,"marks":459,"text":460},"f418d4717a50",[],"Warvena Construction are",{"_key":462,"_type":65,"marks":463,"text":465},"02ce3f547f55",[464],"32830cea3e3e"," TrustMark registered builders",{"_key":467,"_type":65,"marks":468,"text":469},"10c4acf58a1b",[]," based in Redruth, Cornwall. 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