Turner Construction Project case studies that prove capability. Visit ↗
BYOB New inbox in every project
Construction Website Builder in Madrid
Show Madrid clients your portfolio, certifications, and project timeline before they pick up the phone.
Runs on the stack you trust
Prompt to product
From one-line brief to finished app.
Compare the one-line brief with what BYOB ships. Real layout, data, and deploy status, editable from the same workspace.
TD
Team Tasks
Shared task tracking
Today4
Done11
Streak6d
Open live app ↗
Drag the handle. Or focus it and use the arrow keys.
Get inspired
Sites like this, live today.
Real sites that do it well. Build something like this with BYOB.
Balfour Beatty Project maps and capability proof. Visit ↗
Skanska Large-scale projects and sustainability reporting. Visit ↗
Startup Landing-page builder with strong templates. Visit ↗
Walling Visual thinking tool with a clean product page. Visit ↗
Slater Webflow tooling with editor-led proof. Visit ↗
Local details
What to know before you build here
- Currency
- Euro (EUR €)
- Tax
- VAT (IVA) at 21%
- Payments
- Cards, Bizum
- Domain
- .es
Spanish-first; strong mobile usage and local social proof.
Fresh from the community
See what builders ship, or start from an example.
Live workspace
Code, chat, and preview in one place.
The workspace is built for repeated product work, not disposable demos. Every generated file stays inspectable, every change is visible, and every follow-up can target the exact part of the app you care about.
01 · EDITOR
Generated code, ready to edit.
Every file BYOB writes stays visible and editable. Follow-ups target the exact lines you care about instead of regenerating from scratch.
- Added lines highlighted the moment they land
Code
Act mode TodoPage.svelte
schema.ts
1
<script lang='ts'>2
type Task = { id: string; title: string; done: boolean
}3
let tasks = $state<Task[]>([])4
5
function toggleTask(id: string) {6
task.done = !task.done // just added by BYOB7
}8
</script> main · 0 problems Preview ready
02 · AI COMMAND
Plan, build, and refine in one chat.
Describe the outcome once. BYOB turns it into a build plan, implements it step by step, and keeps every change visible while you iterate.
- Build plan with live progress you can inspect
B BYOB AI
Chat Act
Your prompt
“Build a todo app for beginners”
Build plan
80%- Task list UI + empty state
- Add + toggle actions
- Progress summary…
Add due dates and filter by done…
03 · LIVE PREVIEW
See every change the second it lands.
The preview updates as BYOB works, with deploy status attached, so the path from edit to production stays inspectable.
- Real app state, not a static mockup
Live preview
/TD
Team Tasks
Shared task tracking
Progress 2 of 3 done
- Wireframe landing page
- Task list component
- Responsive polish + QA
Ask BYOB to refine
Deployed · SvelteKit · SSL on
Prompt to app
From first prompt to a workspace you can ship.
Start conversationally, approve the shape, let Tool Mode implement, then refine and deploy from the same workspace.
- 01 Describe the product Start with the outcome, audience, and any constraints. BYOB turns the idea into a practical build plan.
- 02 Shape the UX Review the proposed flows, screens, data needs, and visual direction before code starts moving.
- 03 Generate the app Tool Mode writes SvelteKit code, connects integrations, and keeps each change visible in preview.
- 04 Test and refine Ask for edits, roll back when needed, run checks, and keep the project editable instead of disposable.
- 05 Deploy Ship the finished app, connect domains, and keep iterating from the same workspace.
Agent and backend
Code with your agent, ship with a real backend.
Connect Codex, Claude Code, or Antigravity to your project, then store data and ship to production without leaving the workspace.
- Approve project access from BYOB
- Installs the byob command
- Preview, deploy, git diff, DNS, credits, and code tools
npmnpx -y byob-cli codex installApprove only the projects your agent can touch, then read context, edit files, inspect diffs, test previews, and roll back from your terminal.
- 1
- prompt to start
- 3
- live panes
- 24/7
- edge preview
Loved by builders
Rated 4.9/5 by developers and founders using BYOB to move from idea to shipped product.
Built for shipping
The parts that usually slow you down are already here.
BYOB handles product planning, implementation, preview, testing, database work, and deployment from one focused interface, with coding-agent access and production analytics when you want to keep working from your own terminal.
This part is hands-on. The cards drift until you touch them. Drag to rearrange, or press and hold one to feel it push back.
Agent integrations
Give Codex, Claude Code, or Antigravity scoped access through BYOB CLI or Agent MCP. Your agent reads context, edits code, tests previews, and deploys from your terminal.
Git history and diffs
Every change lands as a commit. Inspect history, compare diffs, and see exactly what changed since the last deploy.
Inbox in every project
Every project ships with an inbox. Collect messages, leads, and feedback from your app without wiring a third party.
Email sending built in
Send magic links, OTP codes, and transactional mail from your own sender address. Resend-backed, no SMTP setup.
Google and magic-link login
Offer Continue with Google plus passwordless email codes. Sessions and callbacks are handled.
Custom domains and SSL
Point your domain at BYOB with guided DNS checks. Certificates are automatic.
Visual editing
Click any element in the live preview and describe the change. Copy, spacing, color, behavior.
AI testing agent
Run full-site or feature checks and get implementation-level feedback you can apply in one step.
Version rollback
Step between saved states or redeploy a known commit when an experiment goes sideways.
One-click deploy
Builds publish to production hosting in one step. Deploys can auto-save the project state first.
Deployment analytics
Worker traffic, errors, CPU timing, subrequests, and custom-domain status from the workspace.
Supabase aware
Connect Supabase and BYOB reads schemas, drafts migrations, and generates types that match your app.
Team collaboration
Invite people in and keep sessions coordinated so work never overwrites work.
- Vision inputs
- Voice coding
- Project templates
- SEO-ready output
- Context tracking
- Model lock
Simple pricing
Start with credits, upgrade when usage is steady.
Pay as you go when you are exploring. Move to Pro or Max when BYOB becomes part of your regular build workflow.
Pay as you go
$0
$1 = 100 credits
Pro
$25
2,000+ credits/mo
Max
$79
8,000+ credits/mo
Live estimator
What will your app cost?
Try the cost calculator. Drag the pages slider, toggle the options, and watch the agency quote vs BYOB update instantly.
Open full cost calculator →Number of pages: 5
Traditional agency estimate
$5,750 upfront
Yearly maintenance
~$1,150 / year
BYOB estimate
~$45 in credits
BYOB builds the same site from one prompt and hosts it on the edge. Planning estimates, not quotes.
See BYOB plansView full pricing
Need white-label and SSO? Talk to us →
BYOB helps Madrid construction firms publish a Spanish-first, mobile-friendly website with project galleries, service pages and a quote request form. Show renovation work from Salamanca to Carabanchel, quote in euros with 21% IVA handled clearly, accept Bizum and cards, and connect a.es domain to win local trust.
Spanish first for Madrid's mobile buyers
Madrid clients browse on their phones, often while standing in the flat they want to renovate. A site that opens in English or half-translated Spanish feels foreign, so write in natural Castilian Spanish and design for a small screen first. Keep the phone number tappable, the quote form short and the project photos light enough to load on a patchy connection. Trust grows from visible local detail: the barrio you work in, the tipo de obra you specialise in and the names of nearby streets. Direct, concrete Spanish communicates professionalism.
Reformas, licences and building rules
Renovating a piso in Madrid usually means dealing with a comunidad de propietarios, a licencia de obra from the ayuntamiento and rules about noise and waste. A website that explains these steps in clear Spanish, and says which parts you handle, reassures owners who are nervous about bureaucracy. Describe the kinds of reforma you take on — integral, cocina, baño, local comercial — and note whether you coordinate architects or aparejadores where a project needs them. Showing that you know the paperwork turns a cautious enquiry into a serious conversation.
Presupuestos, IVA and Bizum payments
Spanish clients expect a clear presupuesto before signing anything, with materials, labour and timelines broken out. State whether your figures include IVA at 21% or add it, and keep that consistent between the website and the estimate. Many customers now pay deposits or settle smaller jobs with Bizum, while cards and bank transfer remain common for larger contracts. Publishing your payment stages reduces misunderstandings. A short FAQ covering permits, rubbish removal and access to the building saves time on the phone and shows that you run an organised operation.
Covering barrios across Madrid
Madrid is a collection of distinctive barrios, and clients want a builder who knows their building stock. A flat in Salamanca has different constraints from a piso in Lavapiés, Carabanchel or Tetuán, and a chalet on the outskirts brings its own questions. Create a short service-area page naming the districts you cover and, where possible, link a project to each. This helps neighbours recognise your work and supports local search. Keep the list truthful and revisit it as your teams take on jobs in new parts of the city.
Reviews and references that earn trust
In a city where work often arrives through word of mouth, visible references carry real weight. Collect written reviews from past clients, ask permission to name the barrio or building type, and reply politely to every comment. A page of references from owners, administrators or shopkeepers does more than a wall of logos. Where clients agree, before-and-after photos with a short note about scope and duration make the work believable. Keep the language modest and specific; Madrid buyers are quick to notice exaggeration and quick to reward honesty.
FAQ
Frequently Asked Questions
Do I need a Spanish-language site for Madrid?
Yes. Clients search and read in Spanish, and a natural Castilian tone builds far more confidence than an English site or clumsy translation. Mobile layout matters just as much.
How should I show IVA on a presupuesto?
IVA in Spain is 21% on standard construction services. Say whether your figures include it or add it, and keep that wording identical on the website, the quote and the invoice.
Can I list the barrios I serve?
A service-area page naming districts such as Salamanca, Lavapiés or Carabanchel helps nearby clients find you. Keep it honest and update it as your work extends.
What payment methods do Madrid clients use?
Bizum is common for deposits and smaller jobs, while cards and bank transfers suit larger contracts. Listing your payment stages helps clients plan.
Should I publish client references on my site?
With permission, references and before-and-after photos are persuasive in a referral-driven market. Keep them specific and modest so they read as genuine.
Build the first version today.
Start with one clear prompt. BYOB will help turn it into a product you can inspect, edit, test, and ship.