How-to guide · how to insert a north arrow in autocad

How to insert a north arrow in AutoCAD

DWGDXFFree1,112 words

By Sumana Kumar · Published 27 Feb 2024 · Updated 28 Apr 2024

The north arrow is a small block with an outsized job: it orients every site plan, floor plan and roof plan so anyone reading the drawing knows which way the building faces. Insert it carelessly — pointing up the page by default, or rotated differently on each sheet — and you undermine sun-path studies, wind analysis, planning submissions and basic site setting-out. This guide covers inserting a north arrow in AutoCAD and, crucially, rotating it to the correct true-north bearing.

North arrows are unusual among blocks in that they carry no real-world dimensions — their size is graphic, chosen to suit the plot scale, not the world. What matters instead is the angle: the arrow must point to the real north of the site, which is almost never straight up the sheet. We'll place the block, set that angle, and keep it consistent so every plan in the set agrees.

Pick a north arrow that suits the drawing

North arrows come in many styles — a simple arrow with an N, a compass star, a filled half-arrow, an ornate compass rose. Choose one that matches the formality of the drawing: a clean N-arrow for working drawings, a decorative star or rose for presentation site plans. The building-symbols category includes star and arrow north marks ready to insert.

Unlike most blocks, you don't size a north arrow to real dimensions — you size it to read clearly at the plot scale, typically a comfortable height on the printed sheet. So pick the style first; the scale you set on insertion is purely about how big it looks on paper.

Insert the block on a notes or title layer

Run INSERT and browse to the north arrow DWG. Because the block has no functional dimensions, units matter less here — but it's still good practice to insert it on a non-architectural layer such as a title-block, annotation or notes layer, so it never gets caught up when you freeze building elements.

Place it in a consistent corner of the sheet — top-right is a common home — clear of the drawing itself. Set the scale so it reads well on the plotted sheet; if your drawing uses annotation scaling, an annotative north arrow keeps a constant printed size across viewports at different scales, which is ideal for a multi-scale sheet.

Rotate it to true north

This is the step that actually matters. A north arrow inserted straight up the page is almost always wrong, because buildings are rarely drawn with true north pointing up the sheet. You need the site's north bearing — from the survey, the location plan or the title deeds — expressed as the angle north makes relative to the drawing.

Select the arrow and run ROTATE, pick the arrow's base point, and enter the bearing angle (or drag to a known north reference line on the drawing). If your site survey gives north as, say, 23 degrees clockwise from the top of the sheet, rotate the arrow by that amount. Once set, lock it: the whole point is that this angle is fixed and trustworthy.

True north versus project north

Many projects work to a 'project north' — an idealised up-the-page orientation chosen so the building draws square and reads cleanly — while the real building sits at an angle to true north on the actual site. When that's the case, you show two things: the plan drawn to project north (square and tidy), and a north arrow rotated to indicate true north relative to that drawn orientation.

Some offices show both a project-north and a true-north arrow side by side to make the relationship explicit, especially for sun studies and planning. Decide which convention your set uses and apply it consistently — the reader must never be left guessing whether 'up' on the sheet is true north or just project north.

Keep it consistent across every sheet

The deadliest north-arrow mistake is inconsistency: the arrow pointing one way on the ground-floor plan and another on the site plan. Because the building doesn't rotate between sheets, neither should north. The safest approach is to make the rotated north arrow part of your sheet template or title block, so every new plan inherits the same, correct bearing.

If you place it per-sheet instead, copy the same rotated instance from sheet to sheet rather than re-rotating each time, which invites error. A north arrow on a layout viewport should also account for any viewport rotation — if you twist a viewport to align a wing of the building, the north arrow in that viewport must compensate so it still points to real north.

Common north-arrow errors

The most frequent error is leaving the arrow pointing up the page when north is actually at an angle — this silently corrupts every orientation-dependent decision, from window placement for daylight to solar panel layout. Always set the real bearing from the survey, never assume north is up.

A second is inconsistency between sheets, fixed by templating the arrow as described. A third, easy to miss, is a rotated viewport: if you rotate a viewport to frame the drawing but forget to rotate the north arrow to match, the arrow lies about the orientation. Finally, don't bury the north arrow on an architectural layer where it can be frozen off by accident — keep it on annotation, where it's always visible regardless of which building layers are on.

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Questions

Frequently asked

Which way should the north arrow point?+

To the real north of the site, taken from the survey or location plan — almost never straight up the sheet. Insert the block, then ROTATE it by the site's north bearing so it indicates true north relative to the drawn orientation.

What size should a north arrow be?+

It has no real-world size — choose a size that reads clearly on the plotted sheet at your scale. An annotative north arrow keeps a constant printed size across viewports at different scales, which is handy on a multi-scale sheet.

What's the difference between true north and project north?+

True north is the actual geographic north of the site. Project north is an idealised up-the-page orientation chosen so the building draws square and tidy. When they differ, draw the plan to project north and rotate a north arrow to show true north relative to it.

Why is my north arrow wrong on a rotated viewport?+

Rotating a layout viewport to frame the drawing also rotates everything in it. If the north arrow lives inside that viewport, rotate it to compensate so it still points to real north; or place the arrow in paper space and set it to the true bearing independently.

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