# Harold

> Find sites, run the numbers and progress deals around your mandate, models and ways of working. Harold is an AI platform for UK property teams: land, development and investment. It finds sites, appraises them, files email and documents to the right Site, runs your workflows and keeps every figure tied to its source.

Harold is built by Harold AI Property Ltd (company number 17139812, registered in England and Wales). AI processing runs in the EU with zero data retention, and each organisation's data is isolated.

## Platform

- [Harold Assistant](https://tryharold.com/platform/assistant): Harold reads your Sites, documents and inbox, answers in plain English and cites the record behind every figure.
- [Harold Contacts](https://tryharold.com/platform/crm): Contacts, companies and relationship pipelines, with canvassing campaigns that run from first letter to Site.
- [Harold Deal Finder](https://tryharold.com/platform/deal-finder): Search the land market in plain English, save what your buyers are looking for and let Harold screen new listings against it.
- [Harold Inbox](https://tryharold.com/platform/inbox): Your own mailbox in Harold, with each thread matched to its Site, the tasks inside it found, and your day alongside.
- [Harold Monitors](https://tryharold.com/platform/monitors): Describe what to watch and Harold checks for it on your schedule, judges what matters and tells you why.
- [Harold Reports](https://tryharold.com/platform/reports): Board papers, gateway reports and landowner letters built from the Site's live figures on templates your team already uses.
- [Harold Sites](https://tryharold.com/platform/sites): Every Site on one board with its boundary, appraisal, documents and tasks, appraised the same way every time.
- [Harold Spaces](https://tryharold.com/platform/spaces): Share Sites, files, workflows and reports with a client by link, never by copy, and let them sign in to see only what you shared.
- [Harold Vault](https://tryharold.com/platform/vault): One home for every Site's files, read in the background so you can ask a folder anything and get the page it came from.
- [Harold Workflows](https://tryharold.com/platform/workflows): Turn the steps your team repeats into workflows Harold runs on every Site, with people in the loop where it matters.

## Integrations

- [Harold Connectors](https://tryharold.com/connectors): Connect the email, files, CRM and property data your team relies on to Harold.

## Security and legal

- [Harold Security](https://tryharold.com/platform/security): How Harold keeps confidential property work private: AI processing in the EU with zero retention, isolation by organisation, encrypted connections and a person approving every action.
- [Harold Privacy policy](https://tryharold.com/privacy)
- [Harold Terms and conditions](https://tryharold.com/terms)

## Company

- [About Harold](https://tryharold.com/about)
- [Harold Careers](https://tryharold.com/careers): Help us redefine how the world runs property deals. Open roles at Harold.
- [Harold Blog](https://tryharold.com/blog): Field notes on the property business from the team building Harold.
- [Harold Press kit](https://tryharold.com/press): Harold logos, product screenshots, founder photos and brand guidance, ready to download.
- [Request a Harold demo](https://tryharold.com/contact)

## Open roles

- [AI Engineer](https://tryharold.com/careers/ai-engineer): Make Harold smarter. Ship the intelligence layer. Work at the frontier.
- [Founding Engineer](https://tryharold.com/careers/founding-engineer): Build the product. Own the outcome. Be here from the start.
- [Founding Growth Marketer](https://tryharold.com/careers/founding-growth-marketer): Build Harold’s audience, campaigns and distribution, and turn interest into qualified customer conversations.
- [Founding Sales Executive](https://tryharold.com/careers/founding-sales-executive): Own outbound sales and new business for Harold, from the first call through demos and closing.
- [Head of Growth](https://tryharold.com/careers/head-of-growth): Put Harold on the map. Build the brand. Own the pipeline.

## Optional

- [Land Founders: How Speed Replaced Skill as the Deciding Factor in British Land](https://tryharold.com/blog/ai-land-founders): Why the small UK land firms losing share weren't the bad ones, and what speed has to do with it. The market hasn't been rewarding skill alone for years.
- [Call for Sites Is Not a Filing Exercise: How to Build a Submission That Survives SHELAA](https://tryharold.com/blog/call-for-sites-submission-checklist): What a credible Call for Sites submission needs to show about suitability, availability, achievability and delivery.
- [What is AI site appraisal?](https://tryharold.com/blog/can-you-trust-ai-with-a-land-appraisal): AI site appraisal uses planning, ownership, constraints and appraisal evidence to produce a structured first-pass land review. It helps teams review assumptions faster, but it still needs professional judgement.
- [Claude can do a lot for a land team. Here's where it stops.](https://tryharold.com/blog/claude-vs-harold-for-land-teams): Claude and ChatGPT are genuinely useful on land work. Here are the three points where a chat window stops being enough, and where an analyst trained on your own deals begins.
- [The screening morning](https://tryharold.com/blog/cost-of-manual-site-screening): Every land team has one: the recurring morning lost to first-stage screening. Here's what it actually costs across a year, and why the tools built to fix it keep getting binned.
- [For Developer Land Teams: Why You're Losing First-Refusal Sites to the Promoters You Used to Buy From](https://tryharold.com/blog/developer-first-refusal-sites): The conversation no developer land director wants to have, with the promoter who got to your landowner three months before you did. Why the first-refusal economy has flipped.
- [What Inputs Do You Need for a Development Appraisal?](https://tryharold.com/blog/development-appraisal-inputs-checklist): A practical checklist of the site, planning, value, cost, programme, finance and profit inputs needed for a development appraisal in the UK.
- [How Do You Appraise a Development Site from a Brochure or Listing?](https://tryharold.com/blog/development-site-appraisal-from-brochure-or-listing): A first-pass workflow for turning an agent brochure or property listing into a source-backed development appraisal without treating marketing assumptions as confirmed facts.
- [What Should a Development Viability Sensitivity Analysis Test?](https://tryharold.com/blog/development-viability-sensitivity-analysis): A practical guide to sensitivity analysis in development appraisals, including which variables to test and how to identify the assumptions that can change a site decision.
- [Digital Local Plans: The Data Trail Land Teams Should Start Using Now](https://tryharold.com/blog/digital-local-plan-data-land-teams): Plan and timetable data is becoming structured, but context still decides whether it is useful. This is the minimum evidence trail to preserve.
- [The 20% Buffer Has Arrived: What the July 2026 Housing Land Supply Change Means for Land Teams](https://tryharold.com/blog/five-year-housing-land-supply-20-percent-buffer-2026): A practical guide to the 20% five-year housing land supply buffer applying from 1 July 2026, which authorities it affects and how land teams should review their pipeline.
- [The Four Stages of Local-Plan Site Selection, and the Evidence a Promoter Should Keep at Each One](https://tryharold.com/blog/four-stages-local-plan-site-selection-evidence): Identification, assessment, draft selection and confirmation are different decisions. Here is the evidence trail to keep as a promoted site moves through them.
- [Gateway 1 Is the Starting Gun: What Land Teams Should Watch Before the Clock Begins](https://tryharold.com/blog/gateway-1-local-plan-land-teams): Gateway 1 starts the 30-month process, but the first useful signals arrive months earlier. Track the timetable, notice and scoping work properly.
- [Grey Belt Site Triage: A Practical First-Pass Checklist for Land Teams](https://tryharold.com/blog/grey-belt-site-triage-checklist): An eight-part first-pass process for assessing whether a Green Belt site merits proper grey-belt planning work.
- [Harold × Planlift: Site Intelligence to Share-Ready Visuals](https://tryharold.com/blog/harold-planlift-partnership): Harold and Planlift are building a closer partnership for land teams, with more coming for clients on both sides: site intelligence, appraisal context and developed visuals ready to share.
- [Harold raises £1.15M at a £10.5M valuation to build frontier AI for real estate](https://tryharold.com/blog/harold-raises): Harold has raised £1.15M at a £10.5M valuation to build frontier AI for real estate.
- [Harold and TrustedLand Announce Strategic Partnership](https://tryharold.com/blog/harold-trustedland-strategic-partnership): Harold has been announced as the official AI Partner of TrustedLand, bringing practical property AI and compounding intelligence to more developers, land teams and property professionals.
- [Should you just give the whole team ChatGPT?](https://tryharold.com/blog/harold-vs-chatgpt-and-general-ai): Rolling a general AI out across the firm scales access to a chatbot, not your way of working. What ChatGPT, Gemini and Copilot do for a land team, and what they don't.
- [How can land teams monitor historic sites?](https://tryharold.com/blog/historic-land-opportunity-review): Historic site monitoring helps land teams watch rejected and paused opportunities for planning, ownership, access and viability changes that could justify reopening them.
- [What Happened to the Homes England Development Appraisal Tool in 2026?](https://tryharold.com/blog/homes-england-development-appraisal-tool-2026): Homes England removed its Development Appraisal Tool in April 2026. Here is what changed, what the old DAT was used for and how teams should replace the workflow safely.
- [How Do You Calculate Residual Land Value?](https://tryharold.com/blog/how-to-calculate-residual-land-value): The residual land value formula explained with a worked example, sensitivity checks and the difference between RLV, market value and planning benchmark land value.
- [Introducing Harold Land: one workspace for every land opportunity](https://tryharold.com/blog/introducing-harold-land): Harold Land turns a few words or a title number into a structured site review, then keeps watch across thousands of historic sites and past appraisals to surface deals when the evidence changes.
- [How can developers review historic appraisals?](https://tryharold.com/blog/knowledge-going-stale): Developers can review historic appraisals by comparing old assumptions and source evidence against current planning, ownership, technical and market conditions.
- [What is your firm worth without you?](https://tryharold.com/blog/land-firm-value-without-founder): A land promotion firm's real assets are its relationships, its judgement and its deal history. If all three live in the founder's head, the firm has no value he can ever step back from. A piece on succession for founders who built the thing themselves.
- [The job you trained for](https://tryharold.com/blog/land-manager-admin-trap): You trained to read sites and do deals. Your week is re-keying, chasing consultants and rebuilding packs. A piece for the land manager whose job became admin, and what to do about it.
- [Why your approach letters read like everyone else's](https://tryharold.com/blog/landowner-approach-letters): The week a call for sites opens, a landowner can receive five promoter letters. Four go in the bin together. Here's what the fifth one does differently, and why volume forced everyone into templates.
- [Life-changing money, then silence](https://tryharold.com/blog/landowner-communication-promotion): A landowner signs a promotion agreement expecting life-changing money, then hears nothing for months. Here's what that silence costs promoters, and why it happens to good firms.
- [A Head of Land's Guide to the Landowner Who Goes Quiet, Then Comes Back Eight Weeks Later](https://tryharold.com/blog/landowner-re-engagement): Most land teams lose more sites in the twenty minutes after a landowner re-engages than in any bidding war. Where the time leaks, and what the fast teams do differently.
- [Legacy or New Local-Plan System? How to Tell Which Rules Apply in 2026](https://tryharold.com/blog/legacy-vs-new-local-plan-system-2026): Legacy and new plan-making routes are running in parallel. Use this decision tree before interpreting an authority's stage or deadline.
- [The line a data tool can't cross](https://tryharold.com/blog/line-a-data-tool-cant-cross): A sourcing platform finds the site and levels the field on facts. The part where your firm actually competes sits past a line the tool was never built to cross.
- [Stop Treating the Local-Plan Timetable as a PDF: Build a Promotion Calendar From It](https://tryharold.com/blog/local-plan-timetable-promotion-calendar): The new timetable data is useful only when milestones become internal decisions, evidence cut-offs and named actions for promoted sites.
- [The New Local Plan System Is Live: A 30-Month Operating Guide for Land Teams](https://tryharold.com/blog/new-local-plan-system-30-month-guide-land-teams): The new process is faster, more visible and easy to misread. Here is the authority-level operating record land teams need from notice to adoption.
- [The pipeline you stopped watching](https://tryharold.com/blog/pipeline-you-stopped-watching): While you are heads down on the live deal, the rest of your pipeline keeps moving. The sites lost this way were already yours.
- [The planning pack nobody has time to read properly](https://tryharold.com/blog/planning-pack-nobody-reads): The paragraph that changes your position is on page 94 of a document that gets skimmed on a phone at six o'clock. The pack did its job. The hours to read it properly were not there.
- [How can AI monitor planning and ownership changes?](https://tryharold.com/blog/planning-policy-watchlist-land-teams): AI can monitor planning and ownership changes by checking trusted source feeds, matching updates to sites and explaining which assumptions need professional review.
- [How Do Section 106, CIL and Affordable Housing Affect Development Viability?](https://tryharold.com/blog/section-106-cil-affordable-housing-development-viability): How affordable housing, Section 106 and CIL affect development value, costs and residual land value, and what land teams should check before relying on an appraisal.
- [SHELAA, Allocation or Permission? What Each Status Actually Tells a Land Team](https://tryharold.com/blog/shelaa-allocation-planning-permission): The commercial and planning difference between evidence-base inclusion, local-plan allocation and planning permission.
- [For Land Directors: 'Sites Assessed Per Head' Is the Only Metric That Matters Now](https://tryharold.com/blog/sites-assessed-per-head): Two land teams. Same headcount. One assesses nine sites a month; the other assesses three. The metric most directors aren't yet measuring, and why it now decides which teams compound.
- [The founder who became the bottleneck](https://tryharold.com/blog/the-founder-who-became-the-bottleneck): A firm built around one person works for years, then hits a ceiling. The quiet cost of being the bottleneck, and how to get the firm out of your head without losing control.
- [The slow ones](https://tryharold.com/blog/the-slow-ones): The firm that beat you to that site probably wasn't better. It was faster. Why lean land teams lose to bigger ones, and what actually closes the gap.
- [What Is a Development Viability Appraisal?](https://tryharold.com/blog/what-is-a-development-viability-appraisal): A practical UK guide to development viability appraisals: GDV, costs, profit, residual land value, sensitivity and the evidence land teams should review.
- [What should land-acquisition pipeline software include?](https://tryharold.com/blog/why-proptech-loses-to-spreadsheets): Land-acquisition pipeline software should combine opportunities, owners, evidence, assumptions, decisions and next actions in one auditable workflow.